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Luster TG, Dean RS, Trasolini NA, Eichinger JK, Parada SA, Ralston RK, Waterman BR. Predictive factors influencing internal rotation following reverse total shoulder arthroplasty. J Shoulder Elbow Surg 2024; 33:1200-1208. [PMID: 37993091 DOI: 10.1016/j.jse.2023.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 09/29/2023] [Accepted: 10/18/2023] [Indexed: 11/24/2023]
Abstract
BACKGROUND Reverse total shoulder arthroplasty (RTSA) is increasingly used as a treatment modality for various pathologies. The purpose of this review is to identify preoperative risk factors associated with loss of internal rotation (IR) after RTSA. METHODS A systematic review was conducted using Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Ovid MEDLINE, Ovid Embase, and Scopus were queried. The inclusion criteria were as follows: articles in English language, minimum 1-year follow-up postoperatively, study published after 2012, a minimum of 10 patients in a series, RTSA surgery for any indication, and explicitly reported IR. The exclusion criteria were as follows: articles whose full text was unavailable or that were unable to be translated to English language, a follow-up of less than 1 year, case reports or series of less than 10 cases, review articles, studies in which tendon transfers were performed at the time of surgery, procedures that were not RTSA, and studies in which the range of motion in IR was not reported. RESULTS The search yielded 3792 titles, and 1497 duplicate records were removed before screening. Ultimately, 16 studies met the inclusion criteria with a total of 5124 patients who underwent RTSA. Three studies found that poor preoperative functional IR served as a significant risk factor for poor postoperative IR. Eight studies addressed the impact of subscapularis, with 4 reporting no difference in IR based on subscapularis repair and 4 reporting significant improvements with subscapularis repair. Among studies with sufficient power, BMI was found to be inversely correlated with degree of IR after RTSA. Preoperative opioid use was found to negatively affect IR. Other studies showed that glenoid retroversion, component lateralization, and individualized component positioning affected postoperative IR. CONCLUSIONS This study found that preoperative IR, individualized implant version, preoperative opioid use, increased body mass index and increased glenoid lateralization were all found to have a significant impact on IR after RTSA. Studies that analyzed the impact of subscapularis repair reported conflicting results.
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Affiliation(s)
- Taylor G Luster
- Indiana University School of Medicine, Indianapolis, IN, USA
| | - Robert S Dean
- Department of Orthopedic Surgery, Beaumont Health, Royal Oak, MI, USA
| | - Nicholas A Trasolini
- Department of Orthopedic Surgery and Rehabilitation, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Josef K Eichinger
- Department of Orthopedic Surgery, Medical University of South Carolina, Charleston, SC, USA
| | - Stephen A Parada
- Department of Orthopedic Surgery, Medical College of Georgia, Augusta, GA, USA
| | - Rick K Ralston
- Ruth Lilly Medical Library, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Brian R Waterman
- Department of Orthopedic Surgery and Rehabilitation, Wake Forest University School of Medicine, Winston-Salem, NC, USA.
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Ollivier B, Wakelin E, Plaskos C, Vandenneucker H, Luyckx T. Widening of tibial resection boundaries increases the rate of femoral component valgus and internal rotation in functionally aligned TKA. Knee Surg Sports Traumatol Arthrosc 2024; 32:953-962. [PMID: 38444096 DOI: 10.1002/ksa.12118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 02/12/2024] [Accepted: 02/15/2024] [Indexed: 03/07/2024]
Abstract
PURPOSE The purpose of this study was to investigate the influence of increasing the tibial boundaries in functional alignment on femoral component orientation in total knee arthroplasty (TKA). METHODS A retrospective review of a database of robotic-assisted TKAs using a digital joint tensioning device was performed (BalanceBot®; Corin). A total of 692 TKAs with correctable deformity were included. Functional alignment with a tibia-first balancing technique was simulated by performing an anatomic tibial resection to recreate the native medial proximal tibial angle within certain boundaries (A, 87-90°; B, 86-90°; C, 84-92°), while accounting for wear. After balancing the knee, the resulting amount of femoral component outliers in the coronal and axial plane was calculated for each group and correlated to the coronal plane alignment of the knee (CPAK) classification. RESULTS The proportion of knees with high femoral component varus (>96°) or valgus (<87°) alignment increased from 24.5% (n = 170) in group A to 26.5% (n = 183) in group B and 34.2% (n = 237) in group C (p < 0.05). Similarly, more knees with high femoral component external rotation (>6°) or internal rotation (>3°) were identified in group C (33.4%, n = 231) than in group B (23.7%, n = 164) and A (18.4%, n = 127) (p < 0.05). There was a statistically significant (p < 0.01) overall increase in knees with both femoral component valgus <87° and internal rotation >3° from group A (4.0%, n = 28) to B (7.7%, n = 53) and C (15.8%, n = 109), with CPAK type I and II showing a 12.9- and 2.9-fold increase, respectively. CONCLUSION Extending the tibial boundaries when using functional alignment with a tibia-first balancing technique in TKA leads to a statistically significant higher percentage of knees with a valgus lateral distal femoral angle < 87° and >3° internal rotation of the femoral component, especially in CPAK type I and II. LEVEL OF EVIDENCE Level IV.
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Affiliation(s)
- Britt Ollivier
- Department of Orthopaedics, University Hospitals Leuven, Leuven, Belgium
| | | | | | - Hilde Vandenneucker
- Department of Orthopaedics, University Hospitals Leuven, Leuven, Belgium
- Department of Development and Regeneration, KU Leuven, University of Leuven, Leuven, Belgium
| | - Thomas Luyckx
- Department of Orthopaedic Surgery, AZ Delta, Roeselare, Belgium
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Hwang JT, Kim YB, Cho MS, Seo SJ, Hong MS. Combination of Superior and Posterior Capsular Release Versus Superior Capsular Release Alone in Arthroscopic Repair of Large-to-Massive Rotator Cuff Tears. Orthop J Sports Med 2024; 12:23259671241235916. [PMID: 38486808 PMCID: PMC10938623 DOI: 10.1177/23259671241235916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 09/06/2023] [Indexed: 03/17/2024] Open
Abstract
Background Superior capsular release has been used to reduce tendon tension, especially in arthroscopic repair of large-to-massive rotator cuff tears. Some clinicians have used a more extensive release of capsules in arthroscopic cuff repair for adequate reduction of torn tendons to footprints. Purpose To explore the effects of additional posterior capsular release for superior capsular release in arthroscopic repair of large-to-massive rotator cuff tears. Study Design Cohort study; Level of evidence, 3. Methods We compared 26 shoulders that underwent superior and posterior capsular release (group S&P) with 26 shoulders that underwent superior capsular release alone (group S) in arthroscopic repair of large-to-massive rotator cuff tears between January 23, 2013 and December 2, 2015. The visual analog scale for pain, American Shoulder and Elbow Surgeons score, Constant score, and range of motion (ROM) and muscle power were checked preoperatively and at 2 years postoperatively. Follow-up ultrasound was checked at 2 years postoperatively. Results In both groups, the overall mean functional outcomes improved from preoperatively to postoperatively. Patients in group S&P showed more pre- to postoperative improvement than patients in group S with regard to internal rotation ROM (mean difference, 30.0° vs 20.6°; P < .001) and internal rotation power (3.4 vs 1.8 kgf; P = .001). Patients in group S had a higher retear rate on the follow-up ultrasound than patients in group S&P, but this difference did not reach statistical significance (23.1% vs 11.5%, respectively; P = .465). Conclusion In the current study, patients who underwent superior and posterior capsular release in arthroscopic repair of large-to-massive rotator cuff tears had greater postoperative improvement in internal rotation ROM and power compared with patients who underwent superior capsular release alone.
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Affiliation(s)
- Jung-Taek Hwang
- Department of Orthopedic Surgery, Chuncheon Sacred Heart Hospital, Hallym University Medical College, Chuncheon-si, Gangwon-do, Republic of Korea
| | - Yong-Been Kim
- Department of Orthopedic Surgery, Chuncheon Sacred Heart Hospital, Hallym University Medical College, Chuncheon-si, Gangwon-do, Republic of Korea
| | - Min-Soo Cho
- Department of Orthopedic Surgery, Chuncheon Sacred Heart Hospital, Hallym University Medical College, Chuncheon-si, Gangwon-do, Republic of Korea
| | - Su-Jung Seo
- Department of Orthopedic Surgery, Hallym University Medical College, Chuncheon-si, Gangwon-do, Republic of Korea
| | - Myung Sun Hong
- Department of Radiology, Chuncheon Sacred Heart Hospital, Hallym University Medical College, Chuncheon-si, Gangwon-do, Republic of Korea
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Gaweł E, Zwierzchowska A. The Acute and Long-Term Effects of Olympic Karate Kata Training on Structural and Functional Changes in the Body Posture of Polish National Team Athletes. Sports (Basel) 2024; 12:55. [PMID: 38393274 PMCID: PMC10892039 DOI: 10.3390/sports12020055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/20/2024] [Accepted: 02/05/2024] [Indexed: 02/25/2024] Open
Abstract
The aim of this study was to assess the acute and long-term effects of karate kata training on body posture (range of motion (ROM)) and musculoskeletal pain in elite karate athletes. Twelve kata athletes from the Polish national team participated in the study. A cross-sectional study protocol was used, with direct participatory observation (NMQ-7/6 questionnaire, spinal curvatures and spinal ROM testing, ROM of joints) and natural experiment (225 min of kata training) methods of assessment. Age and number of weekly kata sessions were found to correlate with ROM of the lumbar spine (R = (-0.6), p < 0.05). High increase in the prevalence of lumbar hypolordosis and posterior pelvic tilt was noted after karate training sessions. ROM of the inclination in the sagittal plane differed significantly between the first and second trials, by 10.0 degrees on average. Kata stances and their movement pattern seem to be related to the occurrence of disturbances in the ROM of the internal and external rotations of the hip joints and decreased depth of the lumbar lordosis, pelvic tilt, and their ROM. The locations of the long-term musculoskeletal complaints (NMQ-6) seem to result from compensatory changes that occur in the musculoskeletal structures as a result of elite-level kata training.
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Affiliation(s)
- Eliza Gaweł
- Institute of Sport Sciences, The Jerzy Kukuczka Academy of Physical Education in Katowice, 40-065 Katowice, Poland;
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Ahsan ZS, Berube EE, Frondorf BJ, Bin Kim H, Marom N, Zayyad ZA, Fraychineaud TJ, Patel RM, Wickiewicz TL, Imhauser CW, Pearle AD, Nawabi DH. Role of Lateral Extra-articular Tenodesis in Restraining Internal Tibial Rotation: In Vitro Biomechanical Assessment of Lateral Tissue Engagement. Am J Sports Med 2024; 52:87-95. [PMID: 38164684 DOI: 10.1177/03635465231211534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
BACKGROUND The way in which force increases in the anterolateral tissues and the lateral extra-articular tenodesis (LET) tissue to resist internal rotation (IR) of the tibia after anterior cruciate ligament (ACL) reconstruction in isolation and after LET augmentation, respectively, is not well understood. PURPOSE (1) To compare in a cadaveric model how force increases (ie, engages) in the anterolateral tissues with IR of the tibia after isolated ACL reconstruction and in the LET tissue after augmentation of the ACL reconstruction with LET and (2) to determine whether IR of the tibia is related to engagement of the LET tissue. STUDY DESIGN Controlled laboratory study. METHODS IR moments were applied to 9 human cadaveric knees at 0°, 30°, 60°, and 90° of flexion using a robotic manipulator. Each knee was tested in 2 states: (1) after isolated ACL reconstruction with intact anterolateral tissues and (2) after LET was performed using a modified Lemaire technique with the LET tissue fixed at 60° of flexion under 44 N of tension. Resultant forces carried by the anterolateral tissues and the LET tissue were determined via superposition. The way force increased in these tissues was characterized via parameters of tissue engagement, namely in situ slack, in situ stiffness, and tissue force at peak applied IR moment, and then compared (α < .05). IR was related to parameters of engagement of the LET tissue via simple linear regression (α < .05). RESULTS The LET tissue exhibited less in situ slack than the anterolateral tissues at 30°, 60°, and 90° of flexion (P≤ .04) and greater in situ stiffness at 30° and 90° of flexion (P≤ .043). The LET tissue carried greater force at the peak applied IR moment at 0° and 30° of flexion (P≤ .01). IR was related to the in situ slack of the LET tissue (R2≥ 0.88; P≤ .0003). CONCLUSION LET increased restraint to IR of the tibia compared with the anterolateral tissue, particularly at 30°, 60°, and 90° of flexion. IR of the tibia was positively associated with in situ slack of the LET tissue. CLINICAL RELEVANCE Fixing the LET at 60° of flexion still provided IR restraint in the more functionally relevant flexion angle of 30°. Surgeons should pay close attention to the angle of internal and/or external tibial rotation when fixing the LET tissue intraoperatively because this surgical parameter is related to in situ slack of the LET tissue and, therefore, the amount of IR of the tibia.
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Affiliation(s)
- Zahab S Ahsan
- Sports Medicine Institute, Hospital for Special Surgery, New York, New York, USA
| | - Erin E Berube
- Department of Biomechanics, Hospital for Special Surgery, New York, New York, USA
| | - Brian J Frondorf
- Department of Biomechanics, Hospital for Special Surgery, New York, New York, USA
| | - Ho Bin Kim
- Department of Biomechanics, Hospital for Special Surgery, New York, New York, USA
| | - Niv Marom
- Sports Medicine Institute, Hospital for Special Surgery, New York, New York, USA
| | - Zaid A Zayyad
- Department of Biomechanics, Hospital for Special Surgery, New York, New York, USA
| | | | - Ronak M Patel
- Sports Medicine Institute, Hospital for Special Surgery, New York, New York, USA
| | - Thomas L Wickiewicz
- Sports Medicine Institute, Hospital for Special Surgery, New York, New York, USA
| | - Carl W Imhauser
- Department of Biomechanics, Hospital for Special Surgery, New York, New York, USA
| | - Andrew D Pearle
- Sports Medicine Institute, Hospital for Special Surgery, New York, New York, USA
| | - Danyal H Nawabi
- Sports Medicine Institute, Hospital for Special Surgery, New York, New York, USA
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TOYOTA S. Discovery of internal rotation and conformers of 1,2-dichloroethane: the dawn of the concept of conformation. Proc Jpn Acad Ser B Phys Biol Sci 2024; 100:101-113. [PMID: 38346751 PMCID: PMC10978969 DOI: 10.2183/pjab.100.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 10/13/2023] [Indexed: 02/15/2024]
Abstract
In 1932, Mizushima and Higasi reported the dependence of the dipole moments of 1,2-dichloroethane on both temperature and solvent in the Proceedings of the Imperial Academy, Japan. This report was followed by their first proposal of the existence of conformers that exchanged by internal rotation about a C-C single bond based on experimental data. Their monumental work marked the beginning of the essential concept of conformation in modern stereochemistry. Their proposal was later confirmed by the direct observation of the anti and gauche conformers of 1,2-dichloroethane by Raman spectroscopy, and further supported by other experimental and theoretical methods. The relative stabilities of the anti and gauche conformers of 1,2-dichloroethane and other 1,2-disubstituted ethanes were discussed in terms of steric, electrostatic, and stereoelectronic effects based on analysis of calculated data. Those studies influenced the development of subsequent research in organic chemistry, such as the conformational analysis of cyclohexane derivatives and the isolation of chiral gauche conformers.
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Affiliation(s)
- Shinji TOYOTA
- Department of Chemistry, School of Science, Tokyo Institute of Technology, Tokyo, Japan
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Romanini M, Macovez R, Valenti S, Noor W, Tamarit JL. Dielectric Spectroscopy Studies of Conformational Relaxation Dynamics in Molecular Glass-Forming Liquids. Int J Mol Sci 2023; 24:17189. [PMID: 38139017 PMCID: PMC10743228 DOI: 10.3390/ijms242417189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 11/29/2023] [Accepted: 12/04/2023] [Indexed: 12/24/2023] Open
Abstract
We review experimental results obtained with broadband dielectric spectroscopy concerning the relaxation times and activation energies of intramolecular conformational relaxation processes in small-molecule glass-formers. Such processes are due to the interconversion between different conformers of relatively flexible molecules, and generally involve conformational changes of flexible chain or ring moieties, or else the rigid rotation of planar groups, such as conjugated phenyl rings. Comparative analysis of molecules possessing the same (type of) functional group is carried out in order to test the possibility of assigning the dynamic conformational isomerism of given families of organic compounds to the motion of specific molecular subunits. These range from terminal halomethyl and acetyl/acetoxy groups to both rigid and flexible ring structures, such as the planar halobenzene cycles or the buckled saccharide and diazepine rings. A short section on polyesters provides a generalisation of these findings to synthetic macromolecules.
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Affiliation(s)
| | | | | | | | - Josep Lluís Tamarit
- Grup de Caracterització de Materials, Departament de Física and Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Barcelona East School of Engineering (EEBE), Av. Eduard Maristany 10-14, E-08019 Barcelona, Spain; (M.R.); (R.M.); (S.V.); (W.N.)
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Karatekin YS, Altınayak H, Kehribar L, Yılmaz AK, Korkmaz E, Anıl B. Does Rotation and Anterior Translation Persist as Residual Instability in the Knee after Anterior Cruciate Ligament Reconstruction? (Evaluation of Coronal Lateral Collateral Ligament Sign, Tibial Rotation, and Translation Measurements in Postoperative MRI). Medicina (Kaunas) 2023; 59:1930. [PMID: 38003979 PMCID: PMC10672908 DOI: 10.3390/medicina59111930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 10/24/2023] [Accepted: 10/30/2023] [Indexed: 11/26/2023]
Abstract
Purpose: The aim of this study was to evaluate the presence of residual instability in the knee after ACL reconstruction through the analysis of MRI findings. Methods: This study included patients who underwent isolated ACL reconstruction between December 2019 and December 2021, and had preoperative and postoperative MRI, clinical scores, and postoperative isokinetic measurements. The anterior tibial translation (ATT) distance, coronal lateral collateral ligament (LCL) sign, and femorotibial rotation (FTR) angle were compared preoperatively and postoperatively. The correlation between the changes in preoperative-postoperative measurements and postoperative measurements with clinical scores and isokinetic measurements was examined. The clinical outcomes were compared based on the presence of a postoperative coronal LCL sign. Inclusion criteria were set as follows: the time between the ACL rupture and surgery being 6 months, availability of preoperative and postoperative clinical scores, and objective determination of muscle strength using isokinetic dynamometer device measurements. Patients with a history of previous knee surgery, additional ligament injuries other than the ACL, evidence of osteoarthritis on direct radiographs, cartilage injuries lower limb deformities, and contralateral knee injuries were excluded from this study. Results: This study included 32 patients. After ACL reconstruction, there were no significant changes in the ATT distance (preoperatively: 6.5 ± 3.9 mm, postoperatively: 5.7 ± 3.2 mm) and FTR angle (preoperatively: 5.4° ± 2.9, postoperatively: 5.2° ± 3.5) compared to the preoperative measurements (p > 0.05). The clinical measurements were compared based on the presence of a postoperative coronal LCL sign (observed in 17 patients, not observed in 15 patients), and no significant differences were found for all parameters (p > 0.05). There were no observed correlations between postoperative FTR angle, postoperative ATT distance, FTR angle change, and ATT distance change values with postoperative clinical scores (p > 0.05). Significant correlations were observed between the high strength ratios generated at an angular velocity of 60° and a parameters FTR angle and ATT distance (p-values: 0.028, 0.019, and r-values: -0.389, -0.413, respectively). Conclusions: Despite undergoing ACL reconstruction, no significant changes were observed in the indirect MRI findings (ATT distance, coronal LCL sign, and FTR angle). These results suggest that postoperative residual tibiofemoral rotation and tibial anterior translation may persist; however, they do not seem to have a direct impact on clinical scores. Furthermore, the increase in tibial translation and rotation could potentially negatively affect the flexion torque compared to the extension torque in movements requiring high torque at low angular velocities.
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Affiliation(s)
- Yavuz Selim Karatekin
- Department of Orthopaedics and Traumatology, Samsun Education and Research Hospital, 55090 Samsun, Turkey;
| | - Harun Altınayak
- Department of Orthopaedics and Traumatology, Samsun Education and Research Hospital, 55090 Samsun, Turkey;
| | - Lokman Kehribar
- Medical Faculty, Department of Orthopaedics and Traumatology, Samsun University, 55090 Samsun, Turkey;
| | - Ali Kerim Yılmaz
- Faculty of Yasar Doğu Sport Sciences, Ondokuz Mayıs University, 55090 Samsun, Turkey; (A.K.Y.); (E.K.); (B.A.)
| | - Esra Korkmaz
- Faculty of Yasar Doğu Sport Sciences, Ondokuz Mayıs University, 55090 Samsun, Turkey; (A.K.Y.); (E.K.); (B.A.)
| | - Berna Anıl
- Faculty of Yasar Doğu Sport Sciences, Ondokuz Mayıs University, 55090 Samsun, Turkey; (A.K.Y.); (E.K.); (B.A.)
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Croci E, Born P, Eckers F, Nüesch C, Baumgartner D, Müller AM, Mündermann A. Test-retest reliability of isometric shoulder muscle strength during abduction and rotation tasks measured using the Biodex dynamometer. J Shoulder Elbow Surg 2023; 32:2008-2016. [PMID: 37178965 DOI: 10.1016/j.jse.2023.03.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 03/13/2023] [Accepted: 03/22/2023] [Indexed: 05/15/2023]
Abstract
BACKGROUND The Constant score (CS) is often used clinically to assess shoulder function and includes a muscle strength assessment only for abduction. The aim of this study was to evaluate the test-retest reliability of isometric shoulder muscle strength during various positions of abduction and rotation with the Biodex dynamometer and to determine their correlation with the strength assessment of the CS. METHODS Ten young healthy subjects participated in this study. Isometric shoulder muscle strength was measured during 3 repetitions for abduction at 10° and 30° abduction in the scapular plane (with extended elbow and hand in neutral position) and for internal and external rotation (with the arm at 15° abduction in the scapular plane and elbow flexed at 90°). Muscle strength tests with the Biodex dynamometer were measured in 2 different sessions. The CS was acquired only in the first session. Intraclass correlation coefficients (ICCs) with 95% confidence interval, limits of agreement, and paired t tests for repeated tests of each abduction and rotation task were calculated. Pearson's correlation between the strength parameter of the CS and isometric muscle strength was investigated. RESULTS Muscle strength did not differ between tests (P > .05) with good to very good reliabilities for abduction at 10° and 30°, external rotation and internal rotation (ICC >0.7 for all). A moderate correlation of the strength parameter of the CS with all isometric shoulder strength parameters was observed (r > 0.5 for all). CONCLUSION Shoulder muscle strength for abduction and rotation measured with the Biodex dynamometer are reproducible and correlate with the strength assessment of the CS. Therefore, these isometric muscle strength tests can be further employed to investigate the effect of different shoulder joint pathology on muscle strength. These measurements consider a more comprehensive functionality of the rotator cuff than the single strength evaluation in abduction within the CS as both abduction and rotation are assessed. Potentially, this would allow for a more precise differentiation between the various outcomes of rotator cuff tears.
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Affiliation(s)
- Eleonora Croci
- Department of Biomedical Engineering, University of Basel, Basel, Switzerland; Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland.
| | - Patrik Born
- Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland
| | - Franziska Eckers
- Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland
| | - Corina Nüesch
- Department of Biomedical Engineering, University of Basel, Basel, Switzerland; Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland; Department of Spine Surgery, University Hospital Basel, Basel, Switzerland; Department of Clinical Research, University of Basel, Basel, Switzerland
| | - Daniel Baumgartner
- IMES Institute of Mechanical Systems, Zurich University of Applied Sciences, Winterthur, Switzerland
| | - Andreas Marc Müller
- Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland
| | - Annegret Mündermann
- Department of Biomedical Engineering, University of Basel, Basel, Switzerland; Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland; Department of Spine Surgery, University Hospital Basel, Basel, Switzerland; Department of Clinical Research, University of Basel, Basel, Switzerland
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Delioğlu K, Uzumcugil A, Öztürk E, Bıyık KS, Ozal C, Gunel MK. Cut-off values of internal rotation in the glenohumeral joint for functional tasks in children with brachial plexus birth injury. J Hand Surg Eur Vol 2023; 48:738-746. [PMID: 36788751 DOI: 10.1177/17531934231154362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
The aim of this study was to determine the cut-off values of the range of internal rotation motion in the isolated glenohumeral joint that is required for functional tasks in children with an upper root injury of the brachial plexus. Internal rotation motion was measured using a universal goniometer in 97 participants. The Mallet Hand to Spine and Mallet Hand to Belly tasks were assessed as functional tasks that require internal rotation of the shoulder. For the Hand to Spine task, 41° passive and 30° active internal rotation were necessary to reach the S1 level. For the Hand to Belly task, 42° passive and 29° active internal rotation were required to place the palm on the belly without wrist flexion. Of our participants, 97% could touch the belly with or without wrist flexion, but 28% could not reach S1 in the Hand to Spine task. The results of this study show the necessary amount of internal rotation of the shoulder that should be considered in treatment strategies.Level of evidence: III.
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Affiliation(s)
- Kıvanç Delioğlu
- Faculty of Physical Therapy and Rehabilitation, Hacettepe University, Ankara, Turkey
| | - Akin Uzumcugil
- Faculty of Medicine, Department of Orthopedics and Traumatology, Hacettepe University, Ankara, Turkey
| | - Ebru Öztürk
- Faculty of Medicine, Department of Biostatistics, Hacettepe University, Ankara, Turkey
| | - Kubra Seyhan Bıyık
- Faculty of Physical Therapy and Rehabilitation, Hacettepe University, Ankara, Turkey
| | - Cemil Ozal
- Faculty of Physical Therapy and Rehabilitation, Hacettepe University, Ankara, Turkey
| | - Mintaze Kerem Gunel
- Faculty of Physical Therapy and Rehabilitation, Hacettepe University, Ankara, Turkey
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Ishigaki T, Hirokawa M, Ezawa Y, Yamanaka M. Relationship Between Posterior Shoulder Tightness and Lower-Limb Flexibility in College Baseball Players. J Sport Rehabil 2023:1-10. [PMID: 37146986 DOI: 10.1123/jsr.2022-0205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 01/18/2023] [Accepted: 03/04/2023] [Indexed: 05/07/2023]
Abstract
CONTEXT Posterior shoulder tightness evaluated as limited glenohumeral internal rotation and horizontal adduction is a risk factor for throwing-related shoulder and elbow injuries. Given that the throwing motion uses the entire body kinematics, limited lower-limb flexibility might be associated with posterior shoulder tightness. Therefore, we aimed to investigate the relationships between posterior shoulder tightness and lower-limb flexibility in college baseball players. DESIGN Cross-sectional study. SETTING University laboratory. PARTICIPANTS Twenty-two college baseball players (20 right-handed and 2 left-handed). METHODS To investigate the relationships between glenohumeral range of motion and lower-limb flexibility using simple linear regression analysis, we measured passive range of motion of glenohumeral internal rotation and horizontal adduction, hip internal/external rotation in the prone/sitting position, ankle dorsiflexion, and quadriceps and hamstrings flexibility from both shoulders and legs. RESULTS Our analysis indicated that decreases in the lead leg hip external rotation in the prone position were moderately associated with limitations in glenohumeral internal rotation (R2 = .250, β [95% confidence interval, CI] = 0.500 [0.149 to 1.392], P = .018) and horizontal adduction (R2 = .200, β [95% CI] = 0.447 [0.051 to 1.499], P = .019) on the throwing shoulder. Furthermore, there were significant moderate relationships between decreases in glenohumeral internal rotation and limited lead leg quadriceps flexibility (R2 = .189, β [95% CI] = 0.435 [0.019 to 1.137], P = .022), and between decreases in glenohumeral horizontal adduction and limited stance leg ankle dorsiflexion (R2 = .243, β [95% CI] = 0.493 [0.139 to 1.438], P = .010). CONCLUSION College baseball players with limited lower-limb flexibilities including the lead leg hip external rotation in the prone position, the lead leg quadriceps flexibility, and the stance leg ankle dorsiflexion showed excessive posterior shoulder tightness. The current results support the hypothesis that lower-limb flexibility is associated with posterior shoulder tightness in college baseball players.
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Affiliation(s)
- Tomonobu Ishigaki
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata,Japan
- Graduate School of Health Science, Hokkaido University, Sapporo, Hokkaido,Japan
| | | | - Yuya Ezawa
- Social and Human Science Course, Tokyo Institute of Technology, Meguro-ku, Tokyo,Japan
| | - Masanori Yamanaka
- Department of Physical Therapy, Hokkaido Chitose College of Rehabilitation, Chitose, Hokkaido,Japan
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12
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Johnson BM, Crawford Z, Harley J, Bonamer JP, Grawe BM. A Comparison of Quantitative and Qualitative Shoulder Range of Motion with Patient Reported Outcomes. J Shoulder Elbow Surg 2023:S1058-2746(23)00288-4. [PMID: 36997153 DOI: 10.1016/j.jse.2023.02.133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 02/08/2023] [Accepted: 02/20/2023] [Indexed: 04/01/2023]
Abstract
BACKGROUND The evaluation of shoulder function requires a combination of physical examination of shoulder range of motion and measures of functional outcome measures. Though efforts have been made to define range of motion for clinical evaluation with respect to functional outcomes, a disconnect still exists when defining a successful outcome. We aim to compare quantitative and qualitative measures of shoulder range of motion with patient reported outcome measures. METHODS Data from 100 patients who presented to the office of a single surgeon with a chief complaint of shoulder pain were evaluated for this study. Evaluation included American Shoulder and Elbow Surgeons Standardized Shoulder Form (ASES), Single Assessment Numeric Evaluation (SANE) relative to the shoulder of interest, demographic information, and range of motion in the shoulder of interest. RESULTS Internal rotation angle did not correlate with patient reported outcomes, while external rotation and forward flexion angles did. Qualitative internal rotation as measured by hand-behind-back demonstrated a weak to moderate correlation with patient reported outcomes and a significant difference in global range of motion and functional outcome measures were identified in patients who can or cannot reach above the belt line or to the thoracic spine. Qualitative assessment of forward flexion demonstrated that patients who can reach specific anatomical landmarks have significantly improved functional outcome measures, and the same is true when comparing patients that can externally rotate past neutral. CONCLUSIONS Hand-behind-back reach can be used as a clinical marker of global range of motion and functional outcome measures for patients with shoulder pain. Goniometer measurement of internal rotation has no relationship with patient reported outcomes. Forward flexion and external rotation assessment with qualitative cutoffs can additionally be used clinically to determine functional outcome for patients with shoulder pain.
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Affiliation(s)
- Brian M Johnson
- Department of Orthopaedic Surgery and Sports Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
| | - Zachary Crawford
- Department of Orthopaedic Surgery and Sports Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Johnathan Harley
- Department of Orthopaedic Surgery and Sports Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - John P Bonamer
- Department of Orthopaedic Surgery and Sports Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Brian M Grawe
- Department of Orthopaedic Surgery and Sports Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, USA
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Baweja S, Antonelli E, Hussain S, Fernández-Ramos A, Kleiner I, Nguyen HVL, Sanz ME. Revealing Internal Rotation and 14N Nuclear Quadrupole Coupling in the Atmospheric Pollutant 4-Methyl-2-nitrophenol: Interplay of Microwave Spectroscopy and Quantum Chemical Calculations. Molecules 2023; 28:molecules28052153. [PMID: 36903397 PMCID: PMC10004196 DOI: 10.3390/molecules28052153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/17/2023] [Accepted: 02/17/2023] [Indexed: 03/02/2023] Open
Abstract
The structure and interactions of oxygenated aromatic molecules are of atmospheric interest due to their toxicity and as precursors of aerosols. Here, we present the analysis of 4-methyl-2-nitrophenol (4MNP) using chirped pulse and Fabry-Pérot Fourier transform microwave spectroscopy in combination with quantum chemical calculations. The rotational, centrifugal distortion, and 14N nuclear quadrupole coupling constants of the lowest-energy conformer of 4MNP were determined as well as the barrier to methyl internal rotation. The latter has a value of 106.4456(8) cm-1, significantly larger than those from related molecules with only one hydroxyl or nitro substituent in the same para or meta positions, respectively, as 4MNP. Our results serve as a basis to understand the interactions of 4MNP with atmospheric molecules and the influence of the electronic environment on methyl internal rotation barrier heights.
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Affiliation(s)
- Shefali Baweja
- Department of Chemistry, King’s College London, Britannia House, 7 Trinity Street, London SE1 1DB, UK
| | - Eleonore Antonelli
- Université Paris Est Créteil and Université Paris Cité, CNRS, LISA, F-94010 Créteil, France
| | - Safia Hussain
- Department of Chemistry, King’s College London, Britannia House, 7 Trinity Street, London SE1 1DB, UK
| | - Antonio Fernández-Ramos
- Departamento de Química Física and Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), Jenaro de la Fuente s/n, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Isabelle Kleiner
- Université Paris Cité and Université Paris Est Créteil, CNRS, LISA, F-75013 Paris, France
| | - Ha Vinh Lam Nguyen
- Université Paris Est Créteil and Université Paris Cité, CNRS, LISA, F-94010 Créteil, France
- Institut Universitaire de France (IUF), 1 rue Descartes, F-75231 Paris, France
- Correspondence: (H.V.L.N.); (M.E.S.)
| | - M. Eugenia Sanz
- Department of Chemistry, King’s College London, Britannia House, 7 Trinity Street, London SE1 1DB, UK
- Correspondence: (H.V.L.N.); (M.E.S.)
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14
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Bauer S, Blakeney WG, Wang AW, Ernstbrunner L, Werthel JD, Corbaz J. Challenges for Optimization of Reverse Shoulder Arthroplasty Part I: External Rotation, Extension and Internal Rotation. J Clin Med 2023; 12. [PMID: 36902601 DOI: 10.3390/jcm12051814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/06/2023] [Accepted: 02/16/2023] [Indexed: 03/06/2023] Open
Abstract
A detailed overview of the basic science and clinical literature reporting on the challenges for the optimization of reverse shoulder arthroplasty (RSA) is presented in two review articles. Part I looks at (I) external rotation and extension, (II) internal rotation and the analysis and discussion of the interplay of different factors influencing these challenges. In part II, we focus on (III) the conservation of sufficient subacromial and coracohumeral space, (IV) scapular posture and (V) moment arms and muscle tensioning. There is a need to define the criteria and algorithms for planning and execution of optimized, balanced RSA to improve the range of motion, function and longevity whilst minimizing complications. For an optimized RSA with the highest function, it is important not to overlook any of these challenges. This summary may be used as an aide memoire for RSA planning.
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15
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Yuwen P, Sun W, Guo J, Chang W, Wei N, Wang H, Ding K, Chen W, Zhang Y. Femoral-tibial contact stresses on fixed rotational femur models. Front Surg 2023; 9:1016707. [PMID: 36684303 PMCID: PMC9852333 DOI: 10.3389/fsurg.2022.1016707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 10/28/2022] [Indexed: 01/09/2023] Open
Abstract
Objectives This study aims to quantitatively evaluate the femoral-tibial contact pressure on the knee under certain malrotaional degrees. Methods Femoral-tibial contact pressure was carried out on 14 fixed rotational knee models under 200/400/600 N vertical load using ultra-low-pressure sensitive film technology, rotation angles including neutral position (0°, anatomically reduced), 5°, 10°, and 15° internally and externally. Data were collected and analyzed with SPSS software. Results There are significant statistical differences between the medial contact pressure among rotational deformities (including neutral position) (P < 0.01), the increase in the degree of fixed internal malrotation of the femur resulted in a linear increase in the medial femoral-tibial contact pressures (P < 0.05) under 200/400/600 N vertical load, while increase in the degree of fixed external malrotation resulted in a linear decrease (P < 0.05). Except the 200 N compression, we can't find significant differences in lateral contact pressures (P > 0.05). In the comparison of medial to lateral contact pressures, no statistically significant differences were found in neutral and 5° internal rotation under 200/400 N, neutral, 5° internal rotation, and 15° external rotation under 600 N. In contrast, medial contact pressures were higher than lateral at other angles (P < 0.05). Conclusion Obvious contact pressure changes were observed in rotatory femur. Doctors should detect rotational deformity as much as possible during operation and perform anatomical reduction. For patients with residual rotational deformities, indication of osteotomy should not be too broad.
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Affiliation(s)
- Peizhi Yuwen
- Orthopaedic Research Institute of Hebei Province, Hebei Medical University Third Affiliated Hospital, Shijiazhuang, China
| | - Weiyi Sun
- Orthopaedic Research Institute of Hebei Province, Hebei Medical University Third Affiliated Hospital, Shijiazhuang, China
| | - Jialiang Guo
- Orthopaedic Research Institute of Hebei Province, Hebei Medical University Third Affiliated Hospital, Shijiazhuang, China
| | - Wenli Chang
- Department of Hand Surgery, Cangzhou Hospital of Integrated TCM-WM of Hebei, Cangzhou, China
| | - Ning Wei
- Department of Orthopedic Surgery, Chinese People's Liberation Army Joint Security Force 980th Hospital, Shijiazhuang, China
| | - Haicheng Wang
- Orthopaedic Research Institute of Hebei Province, Hebei Medical University Third Affiliated Hospital, Shijiazhuang, China
| | - Kai Ding
- Orthopaedic Research Institute of Hebei Province, Hebei Medical University Third Affiliated Hospital, Shijiazhuang, China
| | - Wei Chen
- Orthopaedic Research Institute of Hebei Province, Hebei Medical University Third Affiliated Hospital, Shijiazhuang, China,Key Laboratory of Biomechanics of Hebei Province, the Third Hospital of Hebei Medical University, Shijiazhuang, China,Trauma Emergency Center, the Third Hospital of Hebei Medical University, Shijiazhuang, China,NHC Key Laboratory of Intelligent Orthopeadic Equipment, the Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Yingze Zhang
- Orthopaedic Research Institute of Hebei Province, Hebei Medical University Third Affiliated Hospital, Shijiazhuang, China,Key Laboratory of Biomechanics of Hebei Province, the Third Hospital of Hebei Medical University, Shijiazhuang, China,Trauma Emergency Center, the Third Hospital of Hebei Medical University, Shijiazhuang, China,NHC Key Laboratory of Intelligent Orthopeadic Equipment, the Third Hospital of Hebei Medical University, Shijiazhuang, China,Correspondence: Yingze Zhang
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Beckers JJ, Lafosse L, Caruso G, Kopel L, Commeil P, Mariaux S, Lafosse T. A pilot-study focusing on internal rotation after reverse total shoulder arthroplasty using the Activities of Daily Living which require Internal Rotation (ADLIR) score. Shoulder Elbow 2022; 14:657-662. [PMID: 36479017 PMCID: PMC9720871 DOI: 10.1177/17585732211053273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 08/25/2021] [Accepted: 09/20/2021] [Indexed: 11/17/2022]
Abstract
Background Loss of internal rotation remains an issue after reverse total shoulder arthroplasty (RTSA). Our goal is to define the expected functional internal rotation after RTSA using the Activities of Daily Living which require Internal Rotation (ADLIR) score in a homogenous population of patients treated with RTSA. Methods 35 patients with a minimum follow-up of two years after RTSA were evaluated using the ADLIR and Constant-Murley questionnaires. A correlation between the ADLIR and Constant score was investigated and the internal validity of the ADLIR score used in a RTSA patient population was measured using Cronbach's alpha coefficient. The impact of internal rotation on the total rotational arc of motion was defined. Results Excellent results were recorded for both the Constant score (79 ± 18) and ADLIR score (88 ± 16). Pearson's correlation coefficient was r = 0,84 (p-value <0,001). The ADLIR score showed a high reliability for all questions. Conclusions The ADLIR score has proven to be a useful addition in the post-operative evaluation of patients treated with RTSA. Further studies are needed to investigate the evolution of the ADLIR score from pre- to postoperatively in order to determine the clinical and predictive value of this score. Level of evidence Level IV - Observational study.
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Affiliation(s)
- Joris J Beckers
- Alps Surgery Institute, Hand, Upper Limb, Brachial Plexus, and Microsurgery Unit (PBMA), Clinique Générale d’Annecy, Annecy, France
| | - Laurent Lafosse
- Alps Surgery Institute, Hand, Upper Limb, Brachial Plexus, and Microsurgery Unit (PBMA), Clinique Générale d’Annecy, Annecy, France
| | - Giovanni Caruso
- Alps Surgery Institute, Hand, Upper Limb, Brachial Plexus, and Microsurgery Unit (PBMA), Clinique Générale d’Annecy, Annecy, France
| | - Luc Kopel
- Alps Surgery Institute, Hand, Upper Limb, Brachial Plexus, and Microsurgery Unit (PBMA), Clinique Générale d’Annecy, Annecy, France
| | - Paul Commeil
- Alps Surgery Institute, Hand, Upper Limb, Brachial Plexus, and Microsurgery Unit (PBMA), Clinique Générale d’Annecy, Annecy, France
| | - Sandrine Mariaux
- Alps Surgery Institute, Hand, Upper Limb, Brachial Plexus, and Microsurgery Unit (PBMA), Clinique Générale d’Annecy, Annecy, France
| | - Thibault Lafosse
- Alps Surgery Institute, Hand, Upper Limb, Brachial Plexus, and Microsurgery Unit (PBMA), Clinique Générale d’Annecy, Annecy, France
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García-Buendía G, Martínez-García D, Jerez-Mayorga D, Gómez-López M, Chirosa-Ríos IJ, Chirosa-Ríos LJ. Exploration of the Shoulder Internal Rotation's Influence on Throwing Velocity in Handball Players: A Pilot Study. Int J Environ Res Public Health 2022; 19:15923. [PMID: 36497997 PMCID: PMC9738301 DOI: 10.3390/ijerph192315923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/19/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
The main objective of this study was to test the relationship between shoulder internal rotation strength and standing throwing velocity. A repeated measures cross-sectional study was conducted with 20 professional handball players (mean ± SD; age: 19.28 ± 2.55 years, weight: 81.52 ± 9.66 kg, height: 185 ± 6 cm, BMI: 23.74 ± 1.69). The participants were instructed to perform eight standing throws from the 7 m line of the handball court at maximum velocity to calculate the mean and maximum throwing velocity. An incremental test was performed to calculate the repetition maximum (1-RM) of internal rotation shoulder strength. A Pearson's correlation analysis with a 95% confidence interval (95% CI) was performed to determine whether correlations existed between dominant arm internal rotation strength characteristics and maximum and mean ball-throwing velocity. There is no correlation between the internal rotation strength of the throwing shoulder and the velocity of the ball in the standing handball throw.
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Affiliation(s)
- Gustavo García-Buendía
- Department Physical Education and Sports, Faculty of Sport Sciences, University of Granada, 18071 Granada, Spain
- Strength & Conditioning Laboratory, CTS-642 Research Group, Department Physical Education and Sports, Faculty of Sport Sciences, University of Granada, 18071 Granada, Spain
| | - Darío Martínez-García
- Department Physical Education and Sports, Faculty of Sport Sciences, University of Granada, 18071 Granada, Spain
- Strength & Conditioning Laboratory, CTS-642 Research Group, Department Physical Education and Sports, Faculty of Sport Sciences, University of Granada, 18071 Granada, Spain
| | - Daniel Jerez-Mayorga
- Department Physical Education and Sports, Faculty of Sport Sciences, University of Granada, 18071 Granada, Spain
- Strength & Conditioning Laboratory, CTS-642 Research Group, Department Physical Education and Sports, Faculty of Sport Sciences, University of Granada, 18071 Granada, Spain
- Exercise and Rehabilitation Sciences Institute, School of Physical Therapy, Faculty of Rehabilitation Sciences, Universidad Andres Bello, Santiago 7591538, Chile
| | - Manuel Gómez-López
- Department of Physical Activity and Sport, Faculty of Sports Sciences, University of Murcia, Santiago de la Ribera, 30720 Murcia, Spain
| | - Ignacio Jesús Chirosa-Ríos
- Department Physical Education and Sports, Faculty of Sport Sciences, University of Granada, 18071 Granada, Spain
- Strength & Conditioning Laboratory, CTS-642 Research Group, Department Physical Education and Sports, Faculty of Sport Sciences, University of Granada, 18071 Granada, Spain
| | - Luis Javier Chirosa-Ríos
- Department Physical Education and Sports, Faculty of Sport Sciences, University of Granada, 18071 Granada, Spain
- Strength & Conditioning Laboratory, CTS-642 Research Group, Department Physical Education and Sports, Faculty of Sport Sciences, University of Granada, 18071 Granada, Spain
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Sirithiantong T, Sukhapanon T, Cheewatanakornkul R. Comparison between Hip Internal Rotation Assistive Device and Conventional Radiograph Positioning: An Experimental Study. Malays Orthop J 2022; 16:6-10. [PMID: 36589373 PMCID: PMC9791903 DOI: 10.5704/moj.2211.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 12/20/2021] [Indexed: 12/12/2022] Open
Abstract
Introduction Plain anteroposterior radiograph of the hip plays an important role in diagnosing hip pathology. However, one of the most common mistakes is image distortion because the hip is externally rotated due to natural femoral neck anteversion. Thus, the lower extremities should be internally rotated by 15°-20°. The researchers developed a hip internal rotation assistive device and compared it with conventional radiograph positioning. Materials and methods A hip internal rotation assistive device was designed. This study consisted of 20 volunteers without clinical hip pathology. The volunteers were informed to do a hip radiograph twice to compare the efficacy of the developed device with a conventional positioning. The thickness of the lesser trochanter (TLT) was measured and interpreted by an orthopedist and a radiologist. Statistical significance and inter- and intra-observer reliabilities were analysed. Results According to the orthopaedist's measurement, the mean TLT distance was 4.42 + 3.2mm and 4.97 + 3.16mm for the conventional technique and assistive device, respectively, without statistical significance between both groups (p = 0.05). Consistent with the musculoskeletal radiologist, the mean TLT distance was 4.00 + 2.06mm for the conventional technique and 3.92 + 2.27mm for the assistive device, without statistical significance between both groups (p = 0.56). Intra-observer reliability was 0.900 and 0.898 for the orthopaedist and the radiologist, respectively. Interobserver reliability of the assistive device and conventional technique were 0.800 and 0.588, respectively. Conclusion The efficacy of the developed device was similar to that of the conventional technique. Inter/intra-observer reliabilities were at a good agreement level in both methods. The developed device would also be useful in clinical applications, especially in decreasing unnecessary radiation exposure of medical personnel.
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Affiliation(s)
- T Sirithiantong
- Department of Orthopaedics, Hatyai Hospital, Hatyai, Thailand,Corresponding Author: Todsaporn Sirithiantong, Department of Orthopaedics, Hatyai Hospital, 182 Ratthakan, Tambon Hat Yai, Hat Yai District, Songkhla 90110, Thailand
| | - T Sukhapanon
- Department of Orthopaedics, Hatyai Hospital, Hatyai, Thailand
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Rohman E, King JJ, Roche CP, Fan W, Kilian CM, Papandrea RF. Factors associated with improvement or loss of internal rotation after reverse shoulder arthroplasty. J Shoulder Elbow Surg 2022; 31:e346-e358. [PMID: 35167915 DOI: 10.1016/j.jse.2022.01.124] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 01/03/2022] [Accepted: 01/09/2022] [Indexed: 02/01/2023]
Abstract
BACKGROUND Internal rotation (IR) with reverse total shoulder arthroplasty (rTSA) can be unpredictable. Identifying the factors associated with loss of or improved IR could aid preoperative patient counseling. This study quantifies the change in IR experienced by rTSA patients with nonfracture indications and identifies the patient, implant, and operative factors associated with IR loss or gain at 2-year minimum follow-up. METHODS A total of 1978 primary rTSA patients were analyzed from an international database of a single rTSA prosthesis to quantify IR at 2 years' minimum follow-up. rTSA patients were divided into 2 cohorts based on their preoperative IR score, with group 1 patients having less active IR as defined by a preoperative IR score ≤3 and group 2 patients having greater active IR as defined by a preoperative IR score ≥4 (ie, L5 or higher). For both group 1 and 2 patients, univariate and multivariate analyses were performed to quantify the risk factors associated with IR loss after rTSA. RESULTS Overall, 58.9% of rTSA patients experienced IR improvement and 17.0% lost IR after rTSA. The occurrence of IR loss or gain was dependent on preoperative IR score, as 73.2% of group 1 patients improved IR and only 40.1% of group 2 patients improved IR, whereas 31.0% of group 2 patients lost IR and only 6.3% of group 1 patients lost IR after rTSA. Numerous risk factors for IR loss were identified. For group 1 patients, male sex (P = .004, odds ratio [OR] = 2.056), tobacco usage (P = .004, OR = 0.348), larger humeral stem diameter (P = .008, OR = 0.852), and not having subscapularis repaired (P = .002, OR = 2.654) were significant risk factors for IR loss. For group 2 patients, male sex (P = .005, OR = 1.656), higher body mass index (P = .002, OR = 0.946), a diagnosis other than osteoarthritis (P < .001, OR = 2.189), nonaugmented baseplate usage (P < .001, OR = 2.116), and not having subscapularis repaired (P < .001, OR = 3.052) were significant risk factors for IR loss. CONCLUSION The majority of patients improve IR after rTSA in the nonfracture setting. rTSA patients with substantial IR prior to surgery had a greater probability for losing IR compared to patients with poor preoperative IR. Numerous risk factors for IR loss were identified; these risk factors are useful for counseling patients considering rTSA, as some patients are more likely to lose IR than others.
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Affiliation(s)
- Eric Rohman
- Park Nicollet TRIA Orthopedic Center, Maple Grove, MN, USA
| | - Joseph J King
- Department of Orthopaedic Surgery and Sports Medicine, University of Florida, Gainesville, FL, USA
| | | | - Wen Fan
- Exactech, Gainesville, FL, USA
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Nguyen HVL, Caminati W, Grabow JU. The LAM of the Rings: Large Amplitude Motions in Aromatic Molecules Studied by Microwave Spectroscopy. Molecules 2022; 27:3948. [PMID: 35745072 DOI: 10.3390/molecules27123948] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/27/2022] [Accepted: 06/06/2022] [Indexed: 11/17/2022] Open
Abstract
Large amplitude motions (LAMs) form a fundamental phenomenon that demands the development of specific theoretical and Hamiltonian models. In recent years, along with the strong progress in instrumental techniques on high-resolution microwave spectroscopy and computational capacity in quantum chemistry, studies on LAMs have become very diverse. Larger and more complex molecular systems have been taken under investigation, ranging from series of heteroaromatic molecules from five- and six-membered rings to polycyclic-aromatic-hydrocarbon derivatives. Such systems are ideally suited to create families of molecules in which the positions and the number of LAMs can be varied, while the heteroatoms often provide a sufficient dipole moment to the systems to warrant the observation of their rotational spectra. This review will summarize three types of LAMs: internal rotation, inversion tunneling, and ring puckering, which are frequently observed in aromatic five-membered rings such as furan, thiophene, pyrrole, thiazole, and oxazole derivatives, in aromatic six-membered rings such as benzene, pyridine, and pyrimidine derivatives, and larger combined rings such as naphthalene, indole, and indan derivatives. For each molecular class, we will present the representatives and summarize the recent insights on the molecular structure and internal dynamics and how they help to advance the field of quantum mechanics.
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Bruckhuisen J, Chawananon S, Kleiner I, Roucou A, Dhont G, Bracquart C, Asselin P, Cuisset A. Millimeter-Wave Spectroscopy of Methylfuran Isomers: Local vs. Global Treatments of the Internal Rotation. Molecules 2022; 27:molecules27113591. [PMID: 35684523 PMCID: PMC9182110 DOI: 10.3390/molecules27113591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/22/2022] [Accepted: 05/25/2022] [Indexed: 11/22/2022]
Abstract
Methylfurans are methylated aromatic heterocyclic volatile organic compounds and primary or secondary pollutants in the atmosphere due to their capability to form secondary organic aerosols in presence of atmospheric oxidants. There is therefore a significant interest to monitor these molecules in the gas phase. High resolution spectroscopic studies of methylated furan compounds are generally limited to pure rotational spectroscopy in the vibrational ground state. This lack of results might be explained by the difficulties arisen from the internal rotation of the methyl group inducing non-trivial patterns in the rotational spectra. In this study, we discuss the benefits to assign the mm-wave rotational-torsional spectra of methylfuran with the global approach of the BELGI-Cs code compared to local approaches such as XIAM and ERHAM. The global approach reproduces the observed rotational lines of 2-methylfuran and 3-methylfuran in the mm-wave region at the experimental accuracy for the ground vt=0 and the first torsional vt=1 states with a unique set of molecular parameters. In addition, the V3 and V6 parameters describing the internal rotation potential barrier may be determined with a high degree of accuracy with the global approach. Finally, a discussion with other heterocyclic compounds enables the study of the influence of the electronic environment on the hindered rotation of the methyl group.
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Affiliation(s)
- Jonas Bruckhuisen
- LPCA, Laboratoire de Physico-Chimie de l’Atmosphère, Université du Littoral Côte d’Opale, UR4493, F-59140 Dunkerque, France; (J.B.); (A.R.); (G.D.); (C.B.)
| | - Sathapana Chawananon
- CNRS, MONARIS, UMR8233, Sorbonne gé, 4 Pl Jussieu, F-75005 Paris, France; (S.C.); (P.A.)
| | - Isabelle Kleiner
- CNRS UMR 7583, Laboratoire Interuniversitaire des Systèmes Atmosphériques, Université Paris Cité and Université Paris Est Créteil, F-75013 Paris, France;
| | - Anthony Roucou
- LPCA, Laboratoire de Physico-Chimie de l’Atmosphère, Université du Littoral Côte d’Opale, UR4493, F-59140 Dunkerque, France; (J.B.); (A.R.); (G.D.); (C.B.)
| | - Guillaume Dhont
- LPCA, Laboratoire de Physico-Chimie de l’Atmosphère, Université du Littoral Côte d’Opale, UR4493, F-59140 Dunkerque, France; (J.B.); (A.R.); (G.D.); (C.B.)
| | - Colwyn Bracquart
- LPCA, Laboratoire de Physico-Chimie de l’Atmosphère, Université du Littoral Côte d’Opale, UR4493, F-59140 Dunkerque, France; (J.B.); (A.R.); (G.D.); (C.B.)
| | - Pierre Asselin
- CNRS, MONARIS, UMR8233, Sorbonne gé, 4 Pl Jussieu, F-75005 Paris, France; (S.C.); (P.A.)
| | - Arnaud Cuisset
- LPCA, Laboratoire de Physico-Chimie de l’Atmosphère, Université du Littoral Côte d’Opale, UR4493, F-59140 Dunkerque, France; (J.B.); (A.R.); (G.D.); (C.B.)
- Correspondence:
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22
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Hochreiter B, Wyss S, Gerber C. Extension of the shoulder is essential for functional internal rotation after reverse total shoulder arthroplasty. J Shoulder Elbow Surg 2022; 31:1166-1174. [PMID: 34968695 DOI: 10.1016/j.jse.2021.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 11/10/2021] [Accepted: 11/16/2021] [Indexed: 02/01/2023]
Abstract
BACKGROUND Disabling loss of functional internal rotation (fIR) after reverse total shoulder arthroplasty (RTSA) is frequent but not well understood. This study tested the hypothesis that limitation of fIR after RTSA is not primarily related to a deficit in internal rotation. METHODS Fifty patients (mean age at RTSA, 74 ± 11.7 years) who were consecutively seen at a yearly follow-up visit at 1-10 years (median, 4 years) after RTSA were prospectively examined with special attention to fIR. Patients with axillary nerve or deltoid dysfunction were excluded. Relative (age- and sex-adjusted) Constant-Murley scores (CSs) and Subjective Shoulder Values were assessed preoperatively and at final follow-up. In addition, active extension and 4 postoperative activities of daily living (ADLs) requiring fIR were tested at follow-up. Rotator cuff fatty infiltration and notching were evaluated radiographically. For analysis, patients were divided into a group with poor fIR (fIR-, n = 19), defined as ≤2 internal-rotation points in the CS, and a group with good fIR (fIR+, n = 31), defined as ≥4 internal-rotation points in the CS. RESULTS Active extension of the contralateral shoulders was comparable in the fIR- group (mean, 60.3° [standard deviation (SD), 11.2°]) and fIR+ group (66.1° [SD, 14.2°]). Postoperatively, a difference in active extension between the unaffected and operated sides was present in both groups and averaged 16° (55° [SD, 14.3°] in fIR+ group and 39.1° [SD, 10.8°] in fIR- group; P < .001). No patient in the fIR+ group had active extension < 40° (range, 40°-85°). Shoulders with extension ≥ 40° but unsatisfactory fIR had restricted passive internal rotation in extension. The ability to perform ADLs behind the back correlated better with shoulder extension than with so-called fIR measurements in the CS. CONCLUSION Functional internal rotation after RTSA requires at least 40° of shoulder extension. If fIR is unsatisfactory despite 40° of extension, passive restriction of internal rotation in full extension is the limiting factor. It is crucial to preserve or restore active shoulder extension to allow ADLs involving internal rotation.
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Affiliation(s)
- Bettina Hochreiter
- Department of Orthopedics, Balgrist University Hospital, University of Zürich, Zürich, Switzerland.
| | - Sabine Wyss
- Department of Orthopedics, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
| | - Christian Gerber
- Department of Orthopedics, Balgrist University Hospital, University of Zürich, Zürich, Switzerland
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Kumar V, Schoch BS, Allen C, Overman S, Teredesai A, Aibinder W, Parsons M, Watling J, Ko JK, Gobbato B, Throckmorton T, Routman H, Roche C. Using machine learning to predict internal rotation after anatomic and reverse total shoulder arthroplasty. J Shoulder Elbow Surg 2022; 31:e234-e245. [PMID: 34813889 DOI: 10.1016/j.jse.2021.10.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 10/21/2021] [Accepted: 10/23/2021] [Indexed: 02/01/2023]
Abstract
BACKGROUND Improvement in internal rotation (IR) after anatomic (aTSA) and reverse (rTSA) total shoulder arthroplasty is difficult to predict, with rTSA patients experiencing greater variability and more limited IR improvements than aTSA patients. The purpose of this study is to quantify and compare the IR score for aTSA and rTSA patients and create supervised machine learning that predicts IR after aTSA and rTSA at multiple postoperative time points. METHODS Clinical data from 2270 aTSA and 4198 rTSA patients were analyzed using 3 supervised machine learning techniques to create predictive models for internal rotation as measured by the IR score at 6 postoperative time points. Predictions were performed using the full input feature set and 2 minimal input feature sets. The mean absolute error (MAE) quantified the difference between actual and predicted IR scores for each model at each time point. The predictive accuracy of the XGBoost algorithm was also quantified by its ability to distinguish which patients would achieve clinical improvement greater than the minimal clinically important difference (MCID) and substantial clinical benefit (SCB) patient satisfaction thresholds for IR score at 2-3 years after surgery. RESULTS rTSA patients had significantly lower mean IR scores and significantly less mean IR score improvement than aTSA patients at each postoperative time point. Both aTSA and rTSA patients experienced significant improvements in their ability to perform activities of daily living (ADLs); however, aTSA patients were significantly more likely to perform these ADLs. Using a minimal feature set of preoperative inputs, our machine learning algorithms had equivalent accuracy when predicting IR score for both aTSA (0.92-1.18 MAE) and rTSA (1.03-1.25 MAE) from 3 months to >5 years after surgery. Furthermore, these predictive algorithms identified with 90% accuracy for aTSA and 85% accuracy for rTSA which patients will achieve MCID IR score improvement and predicted with 85% accuracy for aTSA patients and 77% accuracy for rTSA which patients will achieve SCB IR score improvement at 2-3 years after surgery. DISCUSSION Our machine learning study demonstrates that active internal rotation can be accurately predicted after aTSA and rTSA at multiple postoperative time points using a minimal feature set of preoperative inputs. These predictive algorithms accurately identified which patients will, and will not, achieve clinical improvement in IR score that exceeds the MCID and SCB patient satisfaction thresholds.
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Affiliation(s)
| | - Bradley S Schoch
- Department of Orthopedic Surgery, Mayo Clinic, Jacksonville, FL, USA
| | | | - Steve Overman
- KenSci, Seattle, WA, USA; University of Washington School of Medicine, Seattle, WA, USA
| | - Ankur Teredesai
- University of Washington School of Medicine, Seattle, WA, USA
| | - William Aibinder
- Department of Orthopaedic Surgery and Rehabilitation Medicine, Downstate Health Sciences University, Brooklyn, NY, USA
| | - Moby Parsons
- The Knee Hip and Shoulder Center, Portsmouth, NH, USA
| | | | - Jiawei Kevin Ko
- Orthopedic Physician Associates, Swedish Orthopedic Institute, Seattle, WA, USA
| | | | - Thomas Throckmorton
- Department of Orthopaedic Surgery, University of Tennessee-Campbell Clinic, Memphis, TN, USA
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Ernstbrunner L, Waltenspül M, Suter C, El-Nashar R, Scherr J, Wieser K. Primary Open Latarjet Procedure Results in Functional Differences but No Structural Changes in Subscapularis Muscle Quality vs the Healthy Contralateral Shoulder at Long-term Follow-up. Am J Sports Med 2022; 50:1495-1502. [PMID: 35315286 PMCID: PMC9069664 DOI: 10.1177/03635465221079858] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND There are concerns that the Latarjet procedure results in loss of glenohumeral rotation and strength and in subscapularis dysfunction. The long-term effects of this procedure on subscapularis quality, glenohumeral rotation, and strength are unknown. PURPOSE/HYPOTHESIS To analyze the long-term effect of the primary open Latarjet procedure using a muscle-splitting approach on internal and external rotation and strength, as well as subscapularis muscle quality as compared with the healthy contralateral side. We hypothesized that the primary open Latarjet procedure is associated with a reduction of long-term shoulder strength and function and decreased subscapularis quality. STUDY DESIGN Case series; Level of evidence, 4. METHODS A total of 42 patients who underwent a primary open Latarjet procedure for recurrent anterior shoulder instability at a mean age of 26 years (range, 18-36) were reviewed after a mean follow-up of 8.4 years (range, 5-12). The subscapularis muscle volume and fat fraction of both shoulders were assessed. Bilateral active internal rotation (IR) and external rotation (ER), as well as IR and ER strength, were assessed by isokinetic testing (concentric, eccentric, and fatigability). RESULTS Active IR (0.6-point difference, P < .001) and ER (4° difference, P = .010) were significantly greater in healthy contralateral shoulders. The IR strength of the operated shoulder was significantly less than that of the healthy shoulder in concentric and eccentric testing (range of deficit, 4%-6%; P < .05). Also, the ER strength of the operated shoulder was significantly less than that of the healthy shoulder in concentric testing (11% deficit, P < .05). Subscapularis muscle volume was significantly greater in the operated shoulder (4% difference, P = .022), and there was no significant difference in fat fraction (P = .114). CONCLUSIONS The primary open Latarjet procedure was associated with significantly decreased active IR and ER and strength when compared with the healthy contralateral shoulder. The clinical influence of these findings is yet to be defined. There was no increased subscapularis muscle fatty degeneration but a minimal hypertrophy on the operated side at long-term follow-up.
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Affiliation(s)
- Lukas Ernstbrunner
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland,Department of Orthopaedic Surgery, Royal Melbourne Hospital, Parkville, Australia,Department of Biomedical Engineering, University of Melbourne, Parkville, Australia,Melbourne Orthopaedic Group, Windsor, Australia,Lukas Ernstbrunner, MD, PhD, Department of Orthopaedic Surgery, Royal Melbourne Hospital, Forchstrasse 340, Zurich, 8008, Switzerland ()
| | - Manuel Waltenspül
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Cyrill Suter
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Rany El-Nashar
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Johannes Scherr
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Karl Wieser
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
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Dang NN, Pham HN, Kleiner I, Schwell M, Grabow JU, Nguyen HVL. Methyl Internal Rotation in Fruit Esters: Chain-Length Effect Observed in the Microwave Spectrum of Methyl Hexanoate. Molecules 2022; 27:molecules27092639. [PMID: 35565991 PMCID: PMC9105109 DOI: 10.3390/molecules27092639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/13/2022] [Accepted: 04/18/2022] [Indexed: 12/02/2022] Open
Abstract
The gas-phase structures of the fruit ester methyl hexanoate, CH3-O-(C=O)-C5H11, have been determined using a combination of molecular jet Fourier-transform microwave spectroscopy and quantum chemistry. The microwave spectrum was measured in the frequency range of 3 to 23 GHz. Two conformers were assigned, one with Cs symmetry and the other with C1 symmetry where the γ-carbon atom of the hexyl chain is in a gauche orientation in relation to the carbonyl bond. Splittings of all rotational lines into doublets were observed due to internal rotation of the methoxy methyl group CH3-O, from which torsional barriers of 417 cm−1 and 415 cm−1, respectively, could be deduced. Rotational constants obtained from geometry optimizations at various levels of theory were compared to the experimental values, confirming the soft degree of freedom of the (C=O)-C bond observed for the C1 conformer of shorter methyl alkynoates like methyl butyrate and methyl valerate. Comparison of the barriers to methyl internal rotation of methyl hexanoate to those of other CH3-O-(C=O)-R molecules leads to the conclusion that though the barrier height is relatively constant at about 420 cm−1, it decreases in molecules with longer R.
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Affiliation(s)
- Nhu-Ngoc Dang
- Department of Life Sciences, University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam; (N.-N.D.); (H.-N.P.)
| | - Hoang-Nam Pham
- Department of Life Sciences, University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam; (N.-N.D.); (H.-N.P.)
| | - Isabelle Kleiner
- Université Paris Cité and Univ Paris Est Creteil, CNRS, LISA, 75013 Paris, France;
| | - Martin Schwell
- Univ Paris Est Creteil and Université Paris Cité, CNRS, LISA, 94010 Créteil, France;
| | - Jens-Uwe Grabow
- Institut für Physikalische Chemie und Elektrochemie, Gottfried-Wilhelm-Leibniz-Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany
- Correspondence: (J.-U.G.); (H.V.L.N.)
| | - Ha Vinh Lam Nguyen
- Univ Paris Est Creteil and Université Paris Cité, CNRS, LISA, 94010 Créteil, France;
- Institut Universitaire de France (IUF), 75231 Paris, France
- Correspondence: (J.-U.G.); (H.V.L.N.)
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26
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Sullivan ES, Jones C, Miller SD, Min Lee K, Seok Park M, Wilson DR, Mulpuri K, d’Entremont AG. Effect of positioning error on the Hilgenreiner epiphyseal angle and the head-shaft angle compared to the femoral neck-shaft angle in children with cerebral palsy. J Pediatr Orthop B 2022; 31:160-168. [PMID: 34723914 PMCID: PMC8790813 DOI: 10.1097/bpb.0000000000000923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 09/15/2021] [Indexed: 12/03/2022]
Abstract
Children with cerebral palsy (CP) often have changes in proximal femoral geometry. Neck-shaft angle (NSA), Hilgenreiner epiphyseal angle (HEA) and head-shaft angle (HSA) are used to measure these changes. The impact of femoral rotation on HEA/HSA and of ab/adduction on HEA/HSA/NSA is not well known. This study aimed to determine and compare the effect of rotation, ab/adduction and flexion/extension on HEA/HSA/NSA. Radiographic measurements from 384 patients with Gross Motor Function Classification System (GMFCS) levels I-V were utilized. NSA/HSA for affected hips were used with femoral anteversion averages to create three-dimensional models of 694 hips in children with CP. Each hip was rotated, ab/adducted and flexed/extended to simulate malpositioning. HEA/HSA/NSA of each model were measured in each joint position, and differences from correct positioning were determined. Mean HEA error at 20° of internal/external rotations were -0.60°/3.17°, respectively, with the NSA error of -6.56°/9.94° and the HSA error of -3.69°/1.21°. Each degree of ab/adduction added 1° of the HEA error, with no NSA/HSA error. NSA was most sensitive to flexion. Error for all measures increased with increasing GMFCS level. HEA/HSA were minimally impacted by rotation. NSA error was much higher than HEA/HSA in internal rotation and flexion whereas HEA was sensitive to changes in ab/adduction. Given abduction is more easily detectable on imaging than rotation, HEA may be less affected by positioning errors that are common with children with CP than NSA. HSA was least affected by position changes. HEA/HSA could be robust, complementary measures of hip deformities in children with CP.
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Affiliation(s)
- Emily S. Sullivan
- Centre for Hip Health and Mobility
- Departments of Biomedical Engineering
| | - Carly Jones
- Centre for Hip Health and Mobility
- Departments of Biomedical Engineering
| | - Stacey D. Miller
- Physical Therapy, University of British Columbia
- Department of Physical Therapy, BC Children’s Hospital, Vancouver, British Columbia, Canada
| | - Kyoung Min Lee
- Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seongnam-Si, Korea
| | - Moon Seok Park
- Department of Orthopedic Surgery, Seoul National University Bundang Hospital, Seongnam-Si, Korea
| | - David R. Wilson
- Centre for Hip Health and Mobility
- Department of Orthopaedics, University of British Columbia
| | - Kishore Mulpuri
- Centre for Hip Health and Mobility
- Department of Orthopaedics, University of British Columbia
- Department of Orthopaedic Surgery, BC Children’s Hospital, Vancouver
| | - Agnes G. d’Entremont
- Centre for Hip Health and Mobility
- Department of Mechanical Engineering, University of British Columbia, Canada
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27
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Collin P, Rol M, Muniandy M, Gain S, Lädermann A, Ode G. Relationship between postoperative integrity of subscapularis tendon and functional outcome in reverse shoulder arthroplasty. J Shoulder Elbow Surg 2022; 31:63-71. [PMID: 34216783 DOI: 10.1016/j.jse.2021.05.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 05/17/2021] [Accepted: 05/23/2021] [Indexed: 02/01/2023]
Abstract
HYPOTHESIS AND BACKGROUND The role of the subscapularis in reverse shoulder arthroplasty (RSA) remains controversial. Studies have shown that subscapularis repair has no significant influence on the functional outcomes of patients. However, few studies have assessed the postoperative integrity of the subscapularis tendon after RSA. The aims of this study were to investigate the postoperative healing of the subscapularis after RSA via ultrasound and to evaluate the relationship between tendon integrity and functional outcomes. We hypothesized that subjects with a healed subscapularis after RSA would have higher Constant scores and better internal rotation (IR) than those without a healed subscapularis. METHODS This was a retrospective review of all patients who underwent primary RSA with subscapularis tenotomy repair performed by a single surgeon with a minimum 2-year follow-up period. The inclusion criteria were (1) primary RSA and (2) complete intraoperative repair of the subscapularis tenotomy if the tendon was amenable to repair. The total Constant score and active and passive range of motion were measured preoperatively and at every postoperative visit. IR was further subcategorized into 3 functional types (type I, buttock or sacrum; type II, lumbar region; and type III, T12 or higher). The integrity of the subscapularis on ultrasound at 2 years was reported using the Sugaya classification. The correlation between subscapularis integrity and functional outcomes including functional IR was evaluated. RESULTS A total of 86 patients (mean age, 73 ± 7.4 years; age range, 50-89 years) were evaluated. The mean postoperative Constant score for all patients significantly improved from 38 points to 72 points (P < .001) at last follow-up (mean, 3.3 years). There was significant improvement in all Constant score functional subscales and in terms of range of motion. The rate of sonographic healing of the subscapularis was 52.6%. There was no difference in Constant scores between "intact" and "failed" tendon repairs; however, intact tendons demonstrated significantly better IR with no difference in external rotation (P < .01). CONCLUSION The healing rate of the subscapularis following RSA was only 52.6%. IR function in patients with an intact subscapularis at 2 years after RSA was significantly better than in patients with failed or absent tendon repairs. Primary repair of reparable subscapularis tendons during RSA should be strongly considered.
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Werner BC, Lederman E, Gobezie R, Denard PJ. Glenoid lateralization influences active internal rotation after reverse shoulder arthroplasty. J Shoulder Elbow Surg 2021; 30:2498-2505. [PMID: 33753271 DOI: 10.1016/j.jse.2021.02.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 02/19/2021] [Accepted: 02/21/2021] [Indexed: 02/01/2023]
Abstract
BACKGROUND Improvement in internal rotation (IR) is not reliably achieved after reverse total shoulder arthroplasty (RSA). The purpose of this study was to evaluate the relationship between postoperative IR and glenoid-sided lateralization following RSA in an implant using metallic lateralization. METHODS A multicenter retrospective study of RSAs with minimum 1-year clinical follow-up was performed. Patients were stratified based on the amount of glenoid-sided implant lateralization into 4 groups: 0-2 mm (n = 57), 4 mm (n =238), 6 mm (n = 95), and 8 mm (n = 65). The primary study outcome was active IR at a minimum of 1 year postoperatively, measured both by spinal level and in degrees with the shoulder abducted to 90°. Secondary outcomes were active forward flexion and external rotation, belly press strength, and subjective patient-reported outcome (PRO) measures. Comparisons were made with 1-way analyses of variance. Linear regression analyses evaluating for the association of glenoid lateralization with active IR were also performed to control for additional confounders, including demographics and other implant variables such as glenosphere diameter, humeral lateralization, humeral version, and whether the subscapularis was repaired. RESULTS A total of 455 patients were included in the study. The mean age was 69 years, and 48% of patients were male. IR differences varied by the method of measurement (spinal level vs. IR in degrees with arm abducted). Overall, patients with 8 mm of glenoid lateralization had significantly improved IR compared with all other lateralization groups. Patients with 6 mm of glenoid lateralization had significantly improved IR compared with the 0-2- and 4-mm groups. There were no significant differences in the secondary outcomes or PROs between lateralization groups. In the regression analysis, glenoid lateralization was the only implant-related variable that was significantly associated with improved IR for both measurement methods. Glenosphere diameter and humeral version were both significantly associated with IR measured in degrees with the arm abducted but not spinal level. CONCLUSIONS For the studied implant system, glenoid lateralization of 6-8 mm was associated with improved active IR at 1 year compared to patients with less glenoid lateralization with no significant differences in active forward flexion, external rotation, or PROs. In a multivariable analysis, increased humeral retroversion was associated with increased IR at 90° and increasing glenosphere diameter was associated with decreased IR at 90°, whereas BMI, subscapularis repair, and humeral lateralization did not significantly affect active IR.
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Ferraro JT, Viola F, Pavlesen S, Albove RH. Thumb to spinous process is a false metric for glenohumeral internal rotation. JSES Rev Rep Tech 2021; 1:373-375. [PMID: 37588699 PMCID: PMC10426529 DOI: 10.1016/j.xrrt.2021.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Abstract
Background The measurement of internal rotation by noting the maximal vertebral level reached by the patient's thumb behind their back is an established physical examination technique, as outlined in the American Shoulder and Elbow Surgeons Shoulder Assessment Form.7 The purpose of the present study is to correlate real-time glenohumeral internal rotation with thumb to spinous process movement to determine the accuracy of the technique. Methods Healthy volunteers with no previous history of shoulder injury or symptoms were recruited from the local medical school population. Ultrasound probe was placed over the anterolateral shoulder, and relevant anatomy was identified. Internal rotation was evaluated by measuring displacement of the peak of the medial aspect of the bicipital groove relative to the anterior glenoid rim with the arm held in defined positions of progressively increasing internal rotation. The difference in displacement between arm positions was calculated and recorded. Results A total of 20 participants (11 women/9 men, aged 22-42 years) were recruited for measurement. A mixed-model repeated-measures analysis of variance was used. The most significant differences in displacement, and therefore internal rotation, were observed between the neutral and anterior superior iliac spine (0.21 ± 0.39 mm, P= .0269) and between the anterior superior iliac spine and peak iliac crest (0.26 ± 0.44 mm, P= .0163). After the peak iliac crest, there was no further statistically significant change in rotation. Conclusion The present study suggests that most glenohumeral internal rotation occurs before reaching the arm behind the back. Although not directly studied, this supports the notion that the maximal vertebral level reached involves an interplay of various joint motions. While the thumb to spinous process maneuver remains a functional evaluation, our results suggest a different examination technique be used to more accurately test glenohumeral internal rotation.
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Affiliation(s)
- Joseph T. Ferraro
- University at Buffalo, Department of Orthopedics and Sports Medicine, Buffalo, NY, USA
| | - Francesca Viola
- State University of New York at Buffalo Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY, USA
| | - Sonja Pavlesen
- University at Buffalo, Department of Orthopedics and Sports Medicine, Buffalo, NY, USA
| | - Robert H. Albove
- University at Buffalo, Department of Orthopedics and Sports Medicine, Buffalo, NY, USA
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Werthel JD, Schoch BS, Hooke A, Sperling JW, An KN, Valenti P, Elhassan B. Biomechanical effectiveness of tendon transfers to restore active internal rotation in shoulder with deficient subscapularis with and without reverse shoulder arthroplasty. J Shoulder Elbow Surg 2021; 30:1196-1206. [PMID: 32919048 DOI: 10.1016/j.jse.2020.08.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 08/13/2020] [Accepted: 08/17/2020] [Indexed: 02/01/2023]
Abstract
BACKGROUND Loss of active shoulder internal rotation can be very disabling. Several tendon transfers have been described for the management of an irreparable subscapularis (SSC) tear. The purpose of this study was to determine and compare the internal rotation moment arm (IRMA) of the sternal head of the pectoralis major (PM), latissimus dorsi (LD), and teres major (TM) when transferred to different insertion sites to restore shoulder internal rotation with and without reverse shoulder arthroplasty (RSA). METHODS Six fresh-frozen right hemithoraces were prepared and evaluated using a custom tendon transfer model to determine the IRMA of different tendon transfers using the tendon and joint displacement method. Five tendon-transfer pairs were modeled using a single suture and tested before and after implantation of an RSA (Comprehensive; Zimmer-Biomet, Warsaw, IN, USA): PM to the insertion site of the SSC, LD to the anterior insertion site of the supraspinatus (SSP) tendon on the greater tuberosity, LD to SSC, TM to SSP, and TM to SSC. The SSC was not repaired at the end of the RSA procedure to simulate an SSC deficiency. The PM transfer was passed under the conjoined tendon when tested on the intact shoulder and above the conjoined tendon when tested with an RSA. RESULTS Tendon transfers were shown to have a significant effect on IRMA. The effect of transferred tendons was significantly affected by the position of the humerus. With the humerus adducted, the IRMA of the TM-SSP (14.1 mm ± 3.1 mm) was significantly greater than the other transfers. With the humerus abducted to 90°, the IRMAs of the LD-SSP (30.0 mm ± 5.4 mm) and TM-SSP (28.4 mm ± 6.6 mm) were significantly greater than the IRMAs of other transfer options. The IRMA of the native shoulder differed significantly from that of the RSA state for all tendon transfers. With the humerus adducted to the side of the body, the IRMA of the RSA PM-SSC transfer was significantly greater than that without an RSA (19.0 mm ± 6.4 mm vs. 7.1 mm ± 0.9 mm), demonstrating increased efficiency for internal rotation in the RSA state. CONCLUSION Tendon transfers to restore shoulder internal rotation differ in effectiveness and may be affected by arm position and by implantation of a lateralized humerus/lateralized glenoid RSA. The LD potentially results in superior restoration of shoulder internal rotation in a native shoulder (given the risk of nerve compression with the TM transfer) compared with PM and should be considered as a potential tendon transfer to restore internal rotation in selected patients. In combination with a lateralized humerus/lateralized glenoid RSA, the fulcrum provided by the biomechanics of the semiconstrained implant allows the PM transfer to become a more efficient tendon transfer to restore active internal rotation.
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Affiliation(s)
- Jean-David Werthel
- Department of Orthopedic Surgery, Hopital Ambroise Paré, Boulogne-Billancourt, France.
| | - Bradley S Schoch
- Department of Orthopedic Surgery, Mayo Clinic, Jacksonville, FL, USA
| | - Alex Hooke
- Department of Biomechanics, Mayo Clinic, Rochester, MN, USA
| | | | - Kai-Nan An
- Department of Biomechanics, Mayo Clinic, Rochester, MN, USA
| | - Philippe Valenti
- Department of Orthopedic Surgery, Paris Shoulder Unit, Paris, France
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Mitchell BC, Siow MY, Bastrom T, Bomar JD, Pennock AT, Parvaresh K, Edmonds EW. Coronal Lateral Collateral Ligament Sign: A Novel Magnetic Resonance Imaging Sign for Identifying Anterior Cruciate Ligament-Deficient Knees in Adolescents and Summarizing the Extent of Anterior Tibial Translation and Femorotibial Internal Rotation. Am J Sports Med 2021; 49:928-934. [PMID: 33617287 DOI: 10.1177/0363546521988938] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Incompetence of the anterior cruciate ligament (ACL) confers knee laxity in the sagittal and axial planes that is measurable with clinical examination and diagnostic imaging. HYPOTHESIS An ACL-deficient knee will produce a more vertical orientation of the lateral collateral ligament (LCL), allowing for the entire length of the LCL to be visualized on a single coronal slice (coronal LCL sign) on magnetic resonance imaging. STUDY DESIGN Cohort study (diagnosis); Level of evidence, 3. METHODS Charts were retrospectively reviewed from April 2009 to December 2017 for all patients treated with ACL reconstruction (constituting the ACL-deficient cohort). A control cohort was separately identified consisting of patients with a normal ACL and no pathology involving the collateral ligaments or posterior cruciate ligament. Patients were excluded for follow-up <2 years, incomplete imaging, and age >19 years. Tibial translation and femorotibial rotation were measured on magnetic resonance images, and posterior tibial slope was measured on a lateral radiograph of the knee. Imaging was reviewed for the presence of the coronal LCL sign. RESULTS The 153 patients included in the ACL-deficient cohort had significantly greater displacement than the 70 control patients regarding anterior translation (5.8 vs 0.3 mm, respectively; P < .001) and internal rotation (5.2° vs -2.4°, P < .001). Posterior tibial slope was not significantly different. The coronal LCL sign was present in a greater percentage of ACL-deficient knees than intact ACL controls (68.6% vs 18.6%, P < .001). The presence of the coronal LCL sign was associated with greater anterior tibial translation (7.2 vs 0.2 mm, P < .001) and internal tibial rotation (7.5° vs -2.4°, P = .074) but not posterior tibial slope (7.9° vs 7.9°, P = .973) as compared with its absence. Multivariate analysis revealed that the coronal LCL sign was significantly associated with an ACL tear (odds ratio, 12.8; P < .001). CONCLUSION Our study provides further evidence that there is significantly more anterior translation and internal rotation of the tibia in the ACL-deficient knee and proves our hypothesis that the coronal LCL sign correlates with the presence of an ACL tear. This coronal LCL sign may be of utility for identifying ACL tears and anticipating the extent of axial and sagittal deformity.
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Affiliation(s)
- Brendon C Mitchell
- Department of Orthopaedic Surgery, University of California-San Diego, San Diego, California, USA
| | - Matthew Y Siow
- Department of Orthopaedic Surgery, University of California-San Diego, San Diego, California, USA
| | - Tracey Bastrom
- Division of Orthopaedic Surgery, Rady Children's Hospital, San Diego, California, USA
| | - James D Bomar
- Division of Orthopaedic Surgery, Rady Children's Hospital, San Diego, California, USA
| | - Andrew T Pennock
- Division of Orthopaedic Surgery, Rady Children's Hospital, San Diego, California, USA
| | - Kevin Parvaresh
- Department of Orthopaedic Surgery, Rush Medical Center, Chicago, Illinois, USA
| | - Eric W Edmonds
- Division of Orthopaedic Surgery, Rady Children's Hospital, San Diego, California, USA
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Eichinger JK, Rao MV, Lin JJ, Goodloe JB, Kothandaraman V, Barfield WR, Parada SA, Roche C, Friedman RJ. The effect of body mass index on internal rotation and function following anatomic and reverse total shoulder arthroplasty. J Shoulder Elbow Surg 2021; 30:265-272. [PMID: 32619658 DOI: 10.1016/j.jse.2020.06.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 06/02/2020] [Accepted: 06/08/2020] [Indexed: 02/01/2023]
Abstract
BACKGROUND The exact relationship between body mass index (BMI) and internal rotation (IR) before and after total shoulder arthroplasty has not been studied to date. The purpose of this study was to determine the effects of BMI on the preoperative and postoperative shoulder range of motion and function in anatomic (aTSA) and reverse total shoulder arthroplasty (rTSA), and specifically how IR affects patient ability to perform IR-related activities of daily living (ADLs). METHODS Patients from a prospective multicenter international shoulder arthroplasty registry who underwent primary rTSA (n=1171) and primary aTSA (n=883) were scored preoperatively and at latest follow-up (2-10 years, mean = 3 years) using the Simple Shoulder Test, University of California-Los Angeles shoulder score, American Shoulder and Elbow Surgeons Standardized Shoulder Assessment Form, Constant score, and Shoulder Pain and Disability Index patient-reported outcome measures (PROMs). Measured active abduction, forward flexion, IR, and active and passive external rotation were recorded, and BMI was evaluated as a predictor of motion and patient-reported outcomes. Patient responses to questions regarding the difficulty level of IR-related ADLs were studied. The relationships between BMI, IR, and ability to perform IR-related ADLs were quantified through analysis of variance with post hoc comparisons by Tukey honestly significant difference tests, where significance was denoted as P < .05. RESULTS BMI was found to be inversely correlated with IR in patients undergoing both aTSA and rTSA, both preoperatively (P < .001 and P = .002) and postoperatively (P < .001 and P < .001). BMI affected the range of motion parameters of forward flexion abduction and external rotation but to a lesser extent than that of IR. Nonobese patients demonstrated significantly greater IR than overweight, obese, and morbidly obese patients postoperatively for aTSA (P < .001). For rTSA, nonobese patients had a significantly greater postoperative IR than obese and morbidly obese patients (P < .001 and P = .011, respectively). For both aTSA and rTSA patients, mean IR scores significantly differed between patients reporting normal function vs. patients reporting slight difficulty, considerable difficulty, or inability to perform IR-related ADLs. Increasing IR demonstrated a significant, positive correlation with all PROMs for both aTSA and rTSA patients (Pearson correlation, P < .001). CONCLUSIONS BMI is an independent predictor of IR, even when controlling for age, gender, glenosphere size, and subscapularis repair. BMI was inversely correlated with the degree of IR, and decreased IR significantly negatively affected the ability to perform IR-related ADLs. CLINICAL RELEVANCE Increasing BMI adversely affects shoulder ROM, particularly IR. IR is correlated with the ability to perform ADLs requiring IR in both aTSA and rTSA patients.
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Affiliation(s)
- Josef K Eichinger
- Medical University of South Carolina, Department of Orthopaedics, Charleston, SC, USA.
| | - Meghana V Rao
- Medical University of South Carolina, Department of Orthopaedics, Charleston, SC, USA
| | - Jackie J Lin
- Medical University of South Carolina, Department of Orthopaedics, Charleston, SC, USA
| | - Jonathan B Goodloe
- Medical University of South Carolina, Department of Orthopaedics, Charleston, SC, USA
| | | | - William R Barfield
- Medical University of South Carolina, Department of Orthopaedics, Charleston, SC, USA
| | - Stephen A Parada
- Medical College of Georgia at Augusta, Department of Orthopaedic Surgery, Augusta, GA, USA
| | | | - Richard J Friedman
- Medical University of South Carolina, Department of Orthopaedics, Charleston, SC, USA
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Lädermann A, Chagué S, Preissmann D, Kolo FC, Zbinden O, Kevelham B, Bothorel H, Charbonnier C. Acromioplasty during repair of rotator cuff tears removes only half of the impinging acromial bone. JSES Int 2020; 4:592-600. [PMID: 32939492 PMCID: PMC7479029 DOI: 10.1016/j.jseint.2020.03.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Background To date, there is no consensus on when and how to perform acromioplasty during rotator cuff repair (RCR). We aimed to determine the volume of impinging bone removed during acromioplasty and whether it influences postoperative range of motion (ROM) and clinical scores after RCR. Methods Preoperative and postoperative computed tomography scans of 57 shoulders that underwent RCR were used to reconstruct scapula models to simulate volumes of impinging acromial bone preoperatively and then compare them to the volumes of bone resected postoperatively to calculate the proportions of desired (ideal) vs. unnecessary (excess) resections. All patients were evaluated preoperatively and at 6 months to assess ROM and functional scores. Results The volume of impinging bone identified was 3.5 ± 2.3 cm3, of which 1.6 ± 1.2 cm3 (50% ± 27%) was removed during acromioplasty. The volume of impinging bone identified was not correlated with preoperative critical shoulder angle (r = 0.025, P = .853), nor with glenoid inclination (r = -0.024, P = .857). The volume of bone removed was 3.7 ± 2.2 cm3, of which 2.1 ± 1.6 cm3 (53% ± 24%) were unnecessary resections. Multivariable analyses revealed that more extensive removal of impinging bone significantly improved internal rotation with the arm at 90° of abduction (beta, 27.5, P = .048) but did not affect other shoulder movements or clinical scores. Conclusions Acromioplasty removed only 50% of the estimated volume of impinging acromial bone. More extensive removal of impinging bone significantly improved internal rotation with the arm at 90° of abduction.
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Affiliation(s)
- Alexandre Lädermann
- Division of Orthopaedics and Trauma Surgery, La Tour Hospital, Meyrin, Switzerland.,Faculty of Medicine, University of Geneva, Geneva, Switzerland.,Division of Orthopaedics and Trauma Surgery, Department of Surgery, Geneva University Hospitals, Geneva, Switzerland
| | - Sylvain Chagué
- Medical Research Department, Artanim Foundation, Meyrin, Switzerland
| | - Delphine Preissmann
- Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital, Prilly, Switzerland
| | | | - Olivia Zbinden
- Service of Orthopedics and Traumatology, Lausanne University Hospital, Lausanne, Switzerland
| | - Bart Kevelham
- Medical Research Department, Artanim Foundation, Meyrin, Switzerland
| | | | - Caecilia Charbonnier
- Faculty of Medicine, University of Geneva, Geneva, Switzerland.,Medical Research Department, Artanim Foundation, Meyrin, Switzerland
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Assenmacher AT, Alentorn-Geli E, Aronowitz J, Kergosien M, Schleck CD, Sánchez-Sotelo J, Cofield RH, Sperling JW. Patient-reported activities after bilateral reverse total shoulder arthoplasties. J Orthop Surg (Hong Kong) 2020; 27:2309499018816771. [PMID: 30526285 DOI: 10.1177/2309499018816771] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
PURPOSE Reverse shoulder arthroplasty (RSA) improves pain and function with very good satisfaction. Concerns exist about some activities of daily living (ADLs) involving internal rotation. The purpose of this study was to report how patients with bilateral RSA perform various ADLs. METHODS Thirty-one primary bilateral RSA patients (average age 76 years; 21 women and 10 men) completed a survey to assess various outcomes. The average time between the second arthroplasty and the survey was 2.7 years (range 1.0-7.8 years). RESULTS All clinical parameters were favorable. All patients reported being able to easily manage toileting and 87% reaching their back pocket. However, 29% found difficulty and 39% were unable to wash their back or put on bra. In comparison with various unilateral arthroplasty types, there was no statistical difference in overall activities ( p < 0.05). CONCLUSION Bilateral RSA can provide good functional outcome and high satisfaction. Patients manage most ADLs easily with some limitations in activities requiring extreme internal rotation.
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Affiliation(s)
| | | | | | | | - Cathy D Schleck
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | | | - Robert H Cofield
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - John W Sperling
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
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Kim MS, Jeong HY, Kim JD, Ro KH, Rhee SM, Rhee YG. Difficulty in performing activities of daily living associated with internal rotation after reverse total shoulder arthroplasty. J Shoulder Elbow Surg 2020; 29:86-94. [PMID: 31427227 DOI: 10.1016/j.jse.2019.05.031] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 05/21/2019] [Accepted: 05/28/2019] [Indexed: 02/01/2023]
Abstract
BACKGROUND Reverse total shoulder arthroplasty (RSA) is a widely accepted treatment for irreparable massive rotator cuff tear (mRCT) and cuff tear arthropathy (CTA), but its impact on activities of daily living (ADLs) remains unclear. METHODS We retrospectively analyzed 77 patients (age range, 54-87 years; follow-up range, 36.1-120.3 months) with irreparable mRCT and CTA treated by medialized RSA between 2008 and 2015. Ten activities considered essential for daily living were selected and scored from 0 to 3. RESULTS The mean visual analog scale scores during motion and University of California at Los Angeles and Constant scores significantly improved at final follow-up (all P < .001). Active forward flexion, external rotation at the side, and internal rotation to the posterior (IRp) were 92.5%, 79.6%, and 48.4% of the contralateral side, respectively, at final follow-up. Active forward flexion and external rotation at the side recovered within 6 months after surgery, similar to the level at final follow-up, but IRp did not reach the preoperative status until final follow-up. ADLs with mean scores of less than 2.0 at final follow-up were "wash the opposite shoulder," "wash the opposite axilla," "use a back pocket," "manage the toilet," and "wash the back" (only 36.4% of patients were able to wash their back at final follow-up). CONCLUSIONS RSA for irreparable mRCT and CTA showed satisfactory clinical outcomes. However, IRp was associated with a limited range compared with the other shoulder motions; therefore, all ADLs associated with internal rotation demonstrated lower recovery rates than expected.
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Affiliation(s)
- Myung Seo Kim
- Department of Orthopedics Surgery, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Republic of Korea
| | - Ho Yeon Jeong
- Department of Orthopaedic Surgery, Shoulder & Elbow Clinic, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Jong Dae Kim
- Department of Orthopaedic Surgery, Shoulder & Elbow Clinic, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Kyung Han Ro
- Department of Orthopaedic Surgery, Shoulder & Elbow Clinic, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Sung-Min Rhee
- Department of Orthopaedic Surgery, Shoulder & Elbow Clinic, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Yong Girl Rhee
- Department of Orthopaedic Surgery, Shoulder & Elbow Clinic, College of Medicine, Kyung Hee University, Seoul, Republic of Korea.
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Rojas J, Joseph J, Srikumaran U, McFarland EG. How internal rotation is measured in reverse total shoulder arthroplasty: a systematic review of the literature. JSES Int 2019; 4:182-188. [PMID: 32544939 PMCID: PMC7075784 DOI: 10.1016/j.jses.2019.10.109] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Background Reverse total shoulder arthroplasty (RTSA) can lead to limited postoperative internal rotation (IR). We assessed how IR is measured and reported in the RTSA literature and examined the relationships between these measures and patient-reported ability to perform activities of daily living. Methods We searched MEDLINE, Embase, and the Cochrane Central Register of Controlled Trials for articles published in English from January 2000 through September 2018 that reported clinical outcomes after RTSA (minimum 12-month follow-up). We included studies reporting IR range of motion (ROM) and/or patient-reported functional outcomes related to IR. We identified 255 studies, 35% of which were excluded because they reported no IR outcome measures, leaving 165 studies for analysis. Results Studies reported 3 methods of measuring IR ROM: (1) vertebral level (VL) method (ie, the most proximal VL reached by the extended thumb with the arm behind the back), (2) degrees of IR with the arm abducted to 90°, and (3) degrees of IR with the arm in a neutral position. The VL measurement was reported in 89% of studies, but the methods of reporting this measure varied. Only 9% of studies reported functional outcomes related to IR. No study correlated clinical measurements of IR ROM with functional outcomes. Conclusions Measures and reporting of shoulder IR after RTSA varied widely. This variability makes it difficult to assess associations between postoperativce IR limitation and functional abilities. Standardization of IR measures and reporting is needed to allow meta-analysis of data related to this important outcome.
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Affiliation(s)
- Jorge Rojas
- Division of Shoulder Surgery, Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, USA.,Department of Orthopedics and Traumatology, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia
| | - Jacob Joseph
- Division of Shoulder Surgery, Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, USA
| | - Uma Srikumaran
- Division of Shoulder Surgery, Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, USA
| | - Edward G McFarland
- Division of Shoulder Surgery, Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, USA
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Abstract
Background This study aimed to determine the toileting ability (TA) of patients undergoing primary reverse total shoulder arthroplasty (RTSA) and identify factors associated with TA postoperatively. Methods A questionnaire regarding toileting was administered to 119 patients who underwent primary RTSA with a minimum 1-year follow-up. Patients were separated into 2 groups based on whether the arm that underwent RTSA was the one used for toileting (study group, n = 74) or not (control group, n = 45). Patient-reported TA was calculated both before and after RTSA. Multivariate analysis was performed to identify factors associated with TA postoperatively. Results Impairment in TA before RTSA was higher in the study group and affected almost three-quarters of the patients (72%). In the study group, primary RTSA resulted in a statistically significant improvement in TA (P < .001), and no difference in TA was found between groups after RTSA (P = .076). Postoperatively, 92% of the patients in the study group were able to manage toileting with the involved extremity (54% without difficulty and 38% with some degree of difficulty). Only 1 patient (1.3%) was totally unable to manage toileting with either arm postoperatively. The patients at risk of toileting difficulties postoperatively were those who had preoperative toileting difficulties and lower postoperative internal rotation range of motion. Conclusions Over 90% of patients can manage toileting after primary RTSA, and total toileting inability is rare after the procedure (1.3%). Patients should be counseled that after primary RTSA, they have a high probability of being able to manage toileting with independence even if it is with some difficulty.
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Affiliation(s)
- Jorge Rojas
- Division of Shoulder Surgery, Department of Orthopaedic Surgery, Johns Hopkins University, Baltimore, MD, USA
| | - Alexander Bitzer
- Division of Shoulder Surgery, Department of Orthopaedic Surgery, Johns Hopkins University, Baltimore, MD, USA
| | - Jacob Joseph
- Division of Shoulder Surgery, Department of Orthopaedic Surgery, Johns Hopkins University, Baltimore, MD, USA
| | - Uma Srikumaran
- Division of Shoulder Surgery, Department of Orthopaedic Surgery, Johns Hopkins University, Baltimore, MD, USA
| | - Edward G McFarland
- Division of Shoulder Surgery, Department of Orthopaedic Surgery, Johns Hopkins University, Baltimore, MD, USA
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Abstract
Background Shoulder arthroplasty, especially reverse shoulder arthroplasty (RSA), continues to increase in volume. Limitations in internal rotation can be challenging following RSA. Current patient-reported outcome measures are limited in assessing a patient's functional internal rotation following shoulder arthroplasty. To address this limitation, a questionnaire was developed. Methods A single-center prospective comparative cohort study was performed to determine the reliability of the questionnaire. A pilot group of patients who had at least 1 year of follow-up following shoulder arthroplasty was asked to complete the questionnaire. Reliability testing was performed using Cronbach's alpha test. Additionally, individual questions and total questionnaire scores were compared between patients who underwent anatomic total shoulder arthroplasty (TSA) and RSA. Results The questionnaire showed high reliability with all questions. A group of 23 anatomic TSA and 20 RSA patients were compared. RSA patients scored significantly lower on the questionnaire (35.2 out of 50 vs. 43.9, P = .001). Conclusion The questionnaire can be used in conjunction with other patient-reported outcome measures to help surgeons better assess patients' results following shoulder arthroplasty. The initial findings from our internal reliability study found that RSA patients had significantly lower scores and higher variability in internal rotation function vs. patients with TSA. Further studies are needed to determine the clinical importance of this questionnaire.
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Affiliation(s)
- Alexander W Aleem
- Department of Orthopaedic Surgery, Washington University in St Louis, St Louis, MO, USA
| | - Aaron M Chamberlain
- Department of Orthopaedic Surgery, Washington University in St Louis, St Louis, MO, USA
| | - Jay D Keener
- Department of Orthopaedic Surgery, Washington University in St Louis, St Louis, MO, USA
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Cui X, Liang L, Zhang H, Zhao J, Li Y, Cheng H, Wang S, Zhang Y. Immobilization in external rotation vs internal rotation after shoulder dislocation: A systematic review and meta-analysis protocol. Medicine (Baltimore) 2019; 98:e16707. [PMID: 31393375 PMCID: PMC6709056 DOI: 10.1097/md.0000000000016707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Dislocation of shoulder joint is the most prone to occurrence in all joints of human body, which is common in young people and has a high recurrence rate. It is mainly treated by conservative treatment. External rotation and internal rotation fixation are 2 common conservative therapies in clinical practice. Therefore, we conduct this systematic review and meta-analysis to evaluate the efficacy and safety of the 2 treatments. METHODS Nine electronic databases, PubMed, Web of Science, Embase, Cochrane Library, Cochrane Central Register of Controlled Trials (CENTRAL), and ClinicalTrials.gov, CNKI, Wanfang Database and VIP Database, will be searched to find and include randomized controlled trials that meet inclusion criteria. RevMan5.3 will be used for data analysis and synthesis in this study. Subgroup analysis and sensitivity analysis will also be performed if necessary. In addition, GRADE will be used in the evaluation of evidence hierarchy. RESULTS This study will analyze and integrate the original evidence so far for clinical efficacy and safety of immobilization in external rotation and internal rotation on shoulder dislocation. CONCLUSION The conclusion of this study will conclude higher evidence and suggestions for the treatment of shoulder dislocation, so as to further guide clinical decision making. PROSPERO REGISTRATION NUMBER CRD42018106030.
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Affiliation(s)
- Xin Cui
- Institute of Basic Research in Clinical Medicine, China Academy of Chinese Medical Sciences
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing
| | - Long Liang
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing
| | - Hongyan Zhang
- Guangzhou University of Traditional Chinese Medicine, Guangzhou
| | - Jing Zhao
- Institute of Basic Research in Clinical Medicine, China Academy of Chinese Medical Sciences
| | - Yongyao Li
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing
| | - Hao Cheng
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing
| | - Shiheng Wang
- China Institute for History of Medicine and Medical Literature, China Academy of Chinese Medical Sciences, Beijing
| | - Yue Zhang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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Salamh PA, Liu X, Kolber MJ, Hanney WJ, Hegedus EJ. The reliability, validity, and methodologic quality of measurements used to quantify posterior shoulder tightness: a systematic review of the literature with meta-analysis. J Shoulder Elbow Surg 2019; 28:178-85. [PMID: 30287146 DOI: 10.1016/j.jse.2018.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 07/09/2018] [Accepted: 07/13/2018] [Indexed: 02/01/2023]
Abstract
HYPOTHESIS AND BACKGROUND Posterior shoulder tightness (PST) has been linked to numerous shoulder pathologies in both the general and athletic populations. Several methods for documenting PST have been described in the literature, which may lend to variability in clinical practice and research. The purpose of this study was to perform a systematic review with meta-analysis to investigate the reliability, validity, and methodologic quality of methods used to quantify PST. METHODS Relevant studies were assessed for inclusion, and selected studies were identified from the PubMed, Embase, Cochrane, and CINAHL (Cumulative Index to Nursing and Allied Health Literature) databases. Data were extracted from the selected studies and underwent methodologic quality assessment and meta-analysis. RESULTS The search resulted in 1006 studies identified, with 18 ultimately retained. Intrarater reliability was reported in 12 studies with a summary intraclass correlation coefficient of 0.93 (95% confidence interval, 0.90-0.95), whereas inter-rater reliability was reported in 6 studies with a summary intraclass correlation coefficient of 0.89 (95% confidence interval, 0.80-0.94). Validity was reported in 10 studies, all using internal rotation as the convergent standard, and was found to be significant in all but 1 study. CONCLUSION Current methods used to quantify PST have good reliability but are primarily limited to measures of horizontal adduction of the glenohumeral joint with scapular stabilization. Limitations in using a single measurement technique exist particularly as there may be multiple contributing factors to PST. A more comprehensive approach for quantifying PST is necessary, and suggested components include a cluster of techniques composed of horizontal adduction, internal rotation, and total glenohumeral joint range of motion.
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Dedy NJ, Gouk CJ, Taylor FJ, Thomas M, Tan SLE. Sonographic assessment of the subscapularis after reverse shoulder arthroplasty: impact of tendon integrity on shoulder function. J Shoulder Elbow Surg 2018; 27:1051-1056. [PMID: 29396098 DOI: 10.1016/j.jse.2017.12.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 12/01/2017] [Accepted: 12/03/2017] [Indexed: 02/01/2023]
Abstract
BACKGROUND The deltopectoral approach for reverse shoulder arthroplasty (RSA) requires subscapularis tenotomy or lesser tuberosity osteotomy. Whether the subscapularis should be repaired at the conclusion of the procedure remains controversial. The present study sonographically assessed the subscapularis after RSA and evaluated the effect of tendon integrity on functional outcome. METHODS All patients who had undergone RSA in the Gold Coast University Hospital between 2005 and 2016 were included. Sonography was performed by a blinded examiner. Function was assessed using the Disabilities of the Arm, Shoulder and Hand, the Constant-Murley, and Oxford Shoulder scores. Internal rotation ability was recorded on a 6-point scale. RESULTS The study included 43 patients (48 shoulders). Median length of follow-up was 19 months (range, 4-132 months). On sonography, the subscapularis was graded intact in 6 shoulders (13%), intact with mild attenuation in 16 (33%), severely attenuated in 15 (31%), and not intact or absent in 11 (23%). Differences in Disabilities of the Arm, Shoulder and Hand, Constant-Murley, or Oxford Shoulder scores between intact and attenuated or absent subscapularis shoulders were not significant. Internal rotation scores were significantly higher in the intact and mildly attenuated tendon group than in the absent tendon group (U = 1.0, P = .001 and U = 28.5, P = .007, respectively). CONCLUSIONS The present work is the first long-term outcome study of RSA using sonography to assess the subscapularis. Subscapularis integrity did not appear to have a measurable effect on patient outcome as measured by standard scores but was important for internal rotation ability after RSA.
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Affiliation(s)
- Nicolas J Dedy
- Department of Plastic, Hand and Reconstructive Surgery, Krankenhaus Barmherzige Brüder Regensburg, Regensburg, Germany.
| | - Conor J Gouk
- Department of Orthopaedic Surgery, Gold Coast University Hospital, Southport, QLD, Australia
| | - Fraser J Taylor
- Department of Orthopaedic Surgery, Gold Coast University Hospital, Southport, QLD, Australia
| | - Michael Thomas
- Department of Orthopaedic Surgery, Gold Coast University Hospital, Southport, QLD, Australia
| | - S L Ezekiel Tan
- Department of Orthopaedic Surgery, Gold Coast University Hospital, Southport, QLD, Australia
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Roucou A, Kleiner I, Goubet M, Bteich S, Mouret G, Bocquet R, Hindle F, Meerts WL, Cuisset A. Towards the Detection of Explosive Taggants: Microwave and Millimetre-Wave Gas-Phase Spectroscopies of 3-Nitrotoluene. Chemphyschem 2018; 19:1056-1067. [PMID: 29328542 DOI: 10.1002/cphc.201701266] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 01/12/2018] [Indexed: 11/07/2022]
Abstract
The monitoring of gas-phase mononitrotoluenes is crucial for defence, civil security and environmental interests because they are used as taggant for TNT detection and in the manufacturing of industrial compounds such as dyestuffs. In this study, we have succeeded to measure and analyse at high-resolution a room temperature rotationally resolved millimetre-wave spectrum of meta-nitrotoluene (3-NT). Experimental and theoretical difficulties have been overcome, in particular, those related to the low vapour pressure of 3-NT and to the presence of a CH3 internal rotation in an almost free rotation regime (V3 =6.7659(24) cm-1 ). Rotational spectra have been recorded in the microwave and millimetre-wave ranges using a supersonic jet Fourier Transform microwave spectrometer (Trot <10 K) and a millimetre-wave frequency multiplication chain (T=293 K), respectively. Spectral analysis of pure rotation lines in the vibrational ground state and in the first torsional excited state supported by quantum chemistry calculations permits the rotational energy of the molecule, the hyperfine structure due to the 14 N nucleus, and the internal rotation of the methyl group to be characterised. A line list is provided for future in situ detection.
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Affiliation(s)
- Anthony Roucou
- Laboratoire de Physico-Chimie de l'Atmosphère (LPCA), EA 4493, Université du Littoral Côte d'Opale, Maison de la Recherche en Environnement Industriel 2 (MREI2), 189A, Avenue Maurice Schumann, 59140, Dunkerque, France
| | - Isabelle Kleiner
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), CNRS UMR 7583, Universités Paris-Est Créteil & Paris Diderot, 61 avenue du Général de Gaulle, F-94010, Créteil cedex, France
| | - Manuel Goubet
- Université Lille 1, CNRS, UMR8523-PhLAM-Physique des Lasers Atomes et Molécules, F-59000, Lille, France
| | - Sabath Bteich
- Université Lille 1, CNRS, UMR8523-PhLAM-Physique des Lasers Atomes et Molécules, F-59000, Lille, France
| | - Gael Mouret
- Laboratoire de Physico-Chimie de l'Atmosphère (LPCA), EA 4493, Université du Littoral Côte d'Opale, Maison de la Recherche en Environnement Industriel 2 (MREI2), 189A, Avenue Maurice Schumann, 59140, Dunkerque, France
| | - Robin Bocquet
- Laboratoire de Physico-Chimie de l'Atmosphère (LPCA), EA 4493, Université du Littoral Côte d'Opale, Maison de la Recherche en Environnement Industriel 2 (MREI2), 189A, Avenue Maurice Schumann, 59140, Dunkerque, France
| | - Francis Hindle
- Laboratoire de Physico-Chimie de l'Atmosphère (LPCA), EA 4493, Université du Littoral Côte d'Opale, Maison de la Recherche en Environnement Industriel 2 (MREI2), 189A, Avenue Maurice Schumann, 59140, Dunkerque, France
| | - W Leo Meerts
- Radboud University, Institute for Molecules and Materials, Felix Laboratory, Toernooiveld 7c, 6525, ED, Nijmegen, The Netherlands
| | - Arnaud Cuisset
- Laboratoire de Physico-Chimie de l'Atmosphère (LPCA), EA 4493, Université du Littoral Côte d'Opale, Maison de la Recherche en Environnement Industriel 2 (MREI2), 189A, Avenue Maurice Schumann, 59140, Dunkerque, France
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Ilyushin VV, Johnson AM, Hohl J, Cloessner EA, Lovas FJ, Lavrich RJ. Isotopic Dependence of the Hydrogen-Transfer-Triggered Methyl-Group Rotation in Deuterated 5-Methyltropolone. J Mol Spectrosc 2018; 343:10.1016/j.jms.2017.09.004. [PMID: 31097843 PMCID: PMC6512845 DOI: 10.1016/j.jms.2017.09.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We present here the first experimental study of the microwave spectrum of deuterated 5-methyltropolone, a molecule which exhibits two large-amplitude motions: an intramolecular hydrogen transfer (deuterium transfer in the current case of deuterated 5-methyltropolone) and a methyl torsion. The main goal of this study was to get information on the isotopic dependence of the main tunneling parameters of 5-methyltropolone in the framework of the two dimensional tunneling formalism, which previously has shown some counterintuitive results for isotopic dependence of tunneling parameters in 2-methylmalonaldehyde. Measurements were carried out by Fourier-transform microwave spectroscopy in the 9 GHz to 26 GHz frequency range. Theoretical analysis was carried out using a tunneling-rotational Hamiltonian based on a G12 m extended-group-theory formalism. Our global fit of 384 transitions to 17 molecular parameters gave a weighted root-mean-square deviation of 0.8. The current study on the isotopic dependence of the main tunneling parameters in 5-methyltropolone supports the assumption of possible "leakage" between tunneling parameters in the two-dimensional tunneling formalism in use.
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Affiliation(s)
- Vadim V Ilyushin
- Institute of Radio Astronomy of NASU, Mystetstv 4, 61002 Kharkov, Ukraine
- Quantum Radiophysics Department of V.N. Karazin Kharkiv National University, Svobody Square 4, 61022, Kharkov, Ukraine
| | - Alyssa M Johnson
- Department of Chemistry and Biochemistry, College of Charleston, Charleston, SC 29424, USA
| | - Jenna Hohl
- Department of Chemistry and Biochemistry, College of Charleston, Charleston, SC 29424, USA
| | - Emily A Cloessner
- Department of Chemistry and Biochemistry, College of Charleston, Charleston, SC 29424, USA
| | - Frank J Lovas
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899-8441, USA
| | - Richard J Lavrich
- Department of Chemistry and Biochemistry, College of Charleston, Charleston, SC 29424, USA
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Abstract
Residual anterolateral rotatory laxity following injury and reconstruction of the anterior cruciate ligament (ACL) has become a popular topic and has generated interest in characterizing the relative contribution from the anterolateral structures of the knee. Studies have reported on the anatomic and biomechanical features of the anterolateral ligament (ALL), revealing a role in restraining internal tibial rotation in both ACL-intact and ACL-deficient knees. The Kaplan fibers of the iliotibial band have also been reported to provide significant restraint to internal tibial rotation. The ACL is the primary restraint to anterior tibial translation, and both the proximal and distal bundles of the iliotibial band, with a divergent orientation, also provide significant static restraint against internal tibial rotation, and each bundle may have a distinct individual role. In the setting of ACL deficiency, subsequent sectioning of the ALL and Kaplan fibers led to further increases in anterior tibial translation. Residual rotatory laxity that may be seen clinically following ACL reconstruction may be attributable to an associated anterolateral structure injury even in the setting of an anatomic ACLR, leading to consideration for a concomitant anterolateral structure reconstruction. Studies evaluating the kinematic influence of anatomic ALL reconstruction or lateral extra-articular tenodesis have focused on internal rotation, axial plane translation, and anterior tibial translation, with variable results having been reported. Further, despite the long history of anterolateral structure reconstruction, most commonly with a lateral extra-articular tenodesis, the clinical use of these combined techniques is still in its relative infancy, and long-term patient outcomes have yet to be published for relative comparisons.
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Escamilla RF, Yamashiro K, Mikla T, Collins J, Lieppman K, Andrews JR. Effects of a Short-Duration Stretching Drill After Pitching on Elbow and Shoulder Range of Motion in Professional Baseball Pitchers. Am J Sports Med 2017; 45:692-700. [PMID: 27810848 DOI: 10.1177/0363546516671943] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND A glenohumeral internal rotation (IR) deficit or a total rotational motion (IR plus external rotation [ER]) deficit in the throwing shoulder compared with the nonthrowing shoulder has been shown to increase the risk of shoulder and elbow injuries. After a pitching session, both IR and total rotational motion deficits have been shown to occur naturally for an extended period of time in asymptomatic pitchers, but it is unclear how to best control these deficits between pitching sessions. Purpose/Hypothesis: The purpose of this study was to determine whether performing a short-duration stretching/calisthenics drill after pitching will result in an increase in IR, ER, total rotational motion, and elbow extension in professional baseball pitchers. It was hypothesized that these shoulder and elbow passive range of motion (PROM) measurements would all decrease after pitching but would subsequently return to prepitching values after the short-duration stretching/calisthenics drill. STUDY DESIGN Controlled laboratory study. METHODS A convenience sample of 20 male professional baseball pitchers served as study participants. The following sequence of activities was performed for all participants: (1) a 5- to 10-minute dynamic warm-up consisting of running and light throwing, (2) elbow extension and IR and ER PROM measurements taken before pitching, (3) 40 full-effort pitches off the pitching mound, (4) 8 minutes of rest, (5) elbow extension and IR and ER PROM measurements taken after pitching, (6) a short-duration stretching/calisthenics drill (two-out drill), and (7) elbow extension and IR and ER PROM measurements taken after the two-out drill. A 1-way repeated-measures analysis of variance ( P < .05) was employed to assess differences in elbow extension, IR, ER, and total rotational motion in the 3 measurement conditions (prepitching, postpitching, and postdrill). To assess intrarater and interrater reliability, intraclass correlation coefficients (ICCs) were calculated, and the measurement error was calculated using the standard error of measurement (SEM). RESULTS Significant differences were observed among the 3 conditions for ER ( P = .002), IR ( P = .027), and total rotational motion ( P < .001), but there was no significant difference in elbow extension ( P = .117). Bonferroni post hoc analyses revealed (1) significantly greater ER during prepitching and postdrill versus the postpitching condition (94° ± 7° [prepitching] and 94° ± 8° [postdrill] vs 88° ± 8°; P = .010 and .005, respectively), (2) significantly greater IR during prepitching and postdrill versus the postpitching condition (36° ± 10° [prepitching] and 35° ± 9° [postdrill] vs 30° ± 10°; P = .034 and .043, respectively), and (3) significantly greater total rotational motion during prepitching and postdrill versus the postpitching condition (129° ± 13° [prepitching] and 129° ± 13° [postdrill] vs 119° ± 13°; P = .034 and .004, respectively). There were no significant differences in ER, IR, or total rotational motion between the prepitching and postdrill conditions ( P > .999 for all). The intrarater reliability (ICC3,1) was 0.91 for ER (SEM, 1.3°) and 0.90 for IR (SEM, 1.9°), and the interrater reliability (ICC2,1) was 0.81 for ER (SEM, 3.3°) and 0.77 for IR (SEM, 4.3°). CONCLUSION After a 40-pitch bullpen session, IR and ER PROM as well as total rotational motion were significantly lower than prepitching values; however, these deficits were restored back to their prepitching levels after the players performed the two-out drill, which may increase pitching performance and decrease the risk of shoulder and elbow injuries. More research is needed to test these hypotheses and assess the clinical efficacy of the two-out drill. CLINICAL RELEVANCE The findings from the current study will assist clinicians better understand the positive effects of performing a short duration stretching/calisthenics drill on shoulder internal and external rotation range of motion between innings while pitching during a baseball game.
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Affiliation(s)
- Rafael F Escamilla
- Department of Physical Therapy, California State University, Sacramento, Sacramento, California, USA.,Andrews Research & Education Foundation, Gulf Breeze, Florida, USA.,Results Physical Therapy and Training Center, Sacramento, California, USA
| | - Kyle Yamashiro
- Results Physical Therapy and Training Center, Sacramento, California, USA
| | - Tony Mikla
- Kime Human Performance Institute, Sacramento, California, USA
| | | | | | - James R Andrews
- Andrews Research & Education Foundation, Gulf Breeze, Florida, USA
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Gillet B, Begon M, Sevrez V, Berger-Vachon C, Rogowski I. Adaptive Alterations in Shoulder Range of Motion and Strength in Young Tennis Players. J Athl Train 2017; 52:137-144. [PMID: 28145740 DOI: 10.4085/1062-6050.52.1.10] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
CONTEXT Playing tennis requires unilateral and intensive movement of the upper limb, which may lead to functional adaptations of the shoulder and an increased injury risk. Identifying which athletes will be future elite tennis players starts at 5 to 6 years of age. Therefore, highly skilled players practice intensively in their childhood. However, whether these functional changes occur during the prepubertal years has not been established. OBJECTIVES To assess changes in glenohumeral-joint-rotation range of motion and strength of the shoulder-complex muscles in prepubertal elite tennis players. DESIGN Cross-sectional study. SETTING Tennis training sports facilities. PATIENTS OR OTHER PARTICIPANTS Sixty-seven male tennis players (age range = 7-13 years) selected by a regional tennis center of excellence were divided into 3 biological age groups relative to their predicted age at peak height velocity: greater than 4 (n = 26; age = 8.7 ± 0.7 years, height = 132.4 ± 12.9 cm, mass = 27.8 ± 3.8 kg), 3 to 4 (n = 21; age = 10.3 ± 0.6 years, height = 144.9 ± 5.7 cm, mass = 34.7 ± 4.0 kg), and 2 (n = 20; age = 12.8 ± 1.4 years, height = 158.5 ± 8.7 cm, mass = 43.0 ± 8.2 kg) years before their age at peak height velocity. MAIN OUTCOME MEASURES(S) We measured the internal- and external-rotation ranges of motion of the glenohumeral joint using a goniometer and calculated the total arc of motion. Maximal isometric strength of 8 shoulder muscles was measured using a handheld dynamometer. Strength values were normalized to body weight and used to calculate 4 agonist-to-antagonist strength ratios. RESULTS The total arc of motion of the glenohumeral joint decreased gradually with biological age (P ≤ .01) due to the decrease in internal-rotation range of motion (P < .001). Absolute strength increased gradually with biological age (P < .001), but the relative strengths and ratios remained similar. CONCLUSIONS Functional adaptations of the shoulder seen in adolescent and adult tennis players were observed in healthy prepubertal players. This knowledge could help clinicians and coaches more effectively monitor shoulder adaptations to tennis practice during the prepubertal years.
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Affiliation(s)
- Benoit Gillet
- Université de Lyon, France.,Université Claude Bernard Lyon 1 Laboratoire Interuniversitaire de Biologie de la Motricité, Villeurbanne Cedex, France.,Laboratoire de Simulation et de Modélisation du Mouvement (S2M), Département de Kinésiologie, Université de Montréal, Laval, QC, Canada
| | - Mickaël Begon
- Université Claude Bernard Lyon 1 Laboratoire Interuniversitaire de Biologie de la Motricité, Villeurbanne Cedex, France.,Centre de Réadaptation Marie-Enfant-Centre Hospitalier d'Université Sainte Justine, Montréal, QC, Canada
| | - Violaine Sevrez
- Aix-Marseille Université, Institut des Sciences du Mouvement Etienne-Jules Marey, Marseille, France
| | - Christian Berger-Vachon
- Université de Lyon, France.,IFSTTAR, Laboratoire de Biomécanique et Mécanique des Chocs, Bron, France.,Ligue du Lyonnais de Tennis, Bron, France
| | - Isabelle Rogowski
- Université de Lyon, France.,Université Claude Bernard Lyon 1 Laboratoire Interuniversitaire de Biologie de la Motricité, Villeurbanne Cedex, France
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Fagiani MR, Song X, Petkov P, Debnath S, Gewinner S, Schöllkopf W, Heine T, Fielicke A, Asmis KR. Structure and Fluxionality of B 13+ Probed by Infrared Photodissociation Spectroscopy. Angew Chem Int Ed Engl 2016; 56:501-504. [PMID: 27918141 DOI: 10.1002/anie.201609766] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Indexed: 11/06/2022]
Abstract
We use cryogenic ion vibrational spectroscopy to characterize the structure and fluxionality of the magic number boron cluster B13+ . The infrared photodissociation (IRPD) spectrum of the D2 -tagged all-11 B isotopologue of B13+ is reported in the spectral range from 435 to 1790 cm-1 and unambiguously assigned to a planar boron double wheel structure based on a comparison to simulated IR spectra of low energy isomers from density-functional-theory (DFT) computations. Born-Oppenheimer DFT molecular dynamics simulations show that B13+ exhibits internal quasi-rotation already at 100 K. Vibrational spectra derived from these simulations allow extracting the first spectroscopic evidence from the IRPD spectrum for the exceptional fluxionality of B13+ .
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Affiliation(s)
- Matias R Fagiani
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstrasse 2, 04103, Leipzig, Germany.,Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
| | - Xiaowei Song
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstrasse 2, 04103, Leipzig, Germany.,Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
| | - Petko Petkov
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstrasse 2, 04103, Leipzig, Germany
| | - Sreekanta Debnath
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstrasse 2, 04103, Leipzig, Germany.,Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
| | - Sandy Gewinner
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
| | - Wieland Schöllkopf
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
| | - Thomas Heine
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstrasse 2, 04103, Leipzig, Germany
| | - André Fielicke
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Hardenbergstraße 36, 10623, Berlin, Germany
| | - Knut R Asmis
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstrasse 2, 04103, Leipzig, Germany
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Reuther KE, Larsen R, Kuhn PD, Kelly JD 4th, Thomas SJ. Sleeper stretch accelerates recovery of glenohumeral internal rotation after pitching. J Shoulder Elbow Surg 2016; 25:1925-9. [PMID: 27745803 DOI: 10.1016/j.jse.2016.07.075] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Accepted: 07/29/2016] [Indexed: 02/01/2023]
Abstract
BACKGROUND The natural time course for recovery of glenohumeral internal rotation (IR) loss after a throwing episode is unknown. In addition, the effect of the sleeper stretch on the time course for recovery of motion after a throwing episode has never been investigated. Therefore, the objectives of this study were to (1) to determine the natural time course for spontaneous recovery of IR after a throwing episode and (2) to evaluate the effect of the sleeper stretch on the time course for recovery of IR after a throwing episode. METHODS The study participants were 17 male high school baseball pitchers (aged 17.7 ± 0.9 years). A crossover designed was used over a 2-week period. For week 1, glenohumeral IR and external rotation (ER) were evaluated in the dominant shoulder 1 day before a throwing episode and at 2 hours, 1 day, 2 days, 3 days, 4 days, and 5 days after pitching. During week 2, participants completed a sleeper stretch protocol before measurements. RESULTS The natural time course of spontaneous recovery for IR after a throwing episode was 4 days. Stretching reduced the time course of recovery for IR to 2 days. CONCLUSION A sleeper stretch program for high school baseball pitchers can accelerate the recovery of commonly observed IR loss and also may mitigate the cumulative effects observed over the course of a season.
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Wirth B, Kolling C, Schwyzer HK, Flury M, Audigé L. Risk of insufficient internal rotation after bilateral reverse shoulder arthroplasty: clinical and patient-reported outcome in 57 patients. J Shoulder Elbow Surg 2016; 25:1146-54. [PMID: 26810018 DOI: 10.1016/j.jse.2015.11.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 10/26/2015] [Accepted: 11/10/2015] [Indexed: 02/01/2023]
Abstract
BACKGROUND Bilateral reverse shoulder arthroplasty (RSA) is controversial because of potential rotational deficits impairing daily living activities. We assessed achievement of insufficient internal rotation (IR) and associated factors in bilateral RSA patients. METHODS Fifty-seven staged bilateral RSA patients with a minimum of 1 year of follow-up after the second intervention were identified from our local monocentric register. Shoulder range of motion (including IR using the Apley scratch test), strength, and Constant and Shoulder Pain and Disability Index scores were assessed preoperatively and 6, 12, and 24 months postoperatively. RESULTS Before surgery, both shoulders were similar regarding imaging parameters, but first operated shoulders tended to have poorer function. One year after the first RSA, 21% of patients had insufficient IR (not reaching the lumbosacral junction) compared with 33% after the second intervention (P = .180). At 2 years, 5% of patients had insufficient IR on both sides. Patients with insufficient IR on the second side at baseline (relative risk [RR], 1.8 [1.0-3.2]) and patients with insufficient IR 1 year after the first RSA (RR, 3.0 [1.6-5.6]) were more likely to have insufficient IR 1 year after the second RSA. Constant and Shoulder Pain and Disability Index scores and abduction of the second side were significantly worse 1 year after the second RSA (P ≤ .047); at 2 years, there were no differences in functional outcome between shoulders. CONCLUSION A minority of bilateral RSA patients did not achieve sufficient IR on at least 1 side. Staged surgery is justified, particularly when the outcome of the initial operation is satisfactory.
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Affiliation(s)
- Barbara Wirth
- Upper Extremities Department, Schulthess Clinic, Zürich, Switzerland
| | - Christoph Kolling
- Upper Extremities Department, Schulthess Clinic, Zürich, Switzerland; Research and Development Department, Schulthess Clinic, Zürich, Switzerland
| | | | - Matthias Flury
- Upper Extremities Department, Schulthess Clinic, Zürich, Switzerland
| | - Laurent Audigé
- Upper Extremities Department, Schulthess Clinic, Zürich, Switzerland; Research and Development Department, Schulthess Clinic, Zürich, Switzerland.
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Abstract
BACKGROUND Functional ankle instability (FAI) may involve abnormal kinematics and contact mechanics during ankle internal rotation. Understanding of these abnormalities is important to prevent secondary problems in patients with FAI. However, there are no in vivo studies that have investigated talocrural joint contact mechanics during weightbearing ankle internal rotation. The objective of this study to determine talocrural contact mechanics during weightbearing ankle internal rotation in patients with FAI. METHODS Twelve male subjects with unilateral FAI (age range, 18-26 years) were enrolled. Computed tomography and fluoroscopic imaging of both lower extremities were obtained during weightbearing passive ankle joint complex rotation. Three-dimensional bone models created from the computed tomographic images were matched to the fluoroscopic images to compute 6 degrees of freedom for talocrural joint kinematics. The closest contact area in the talocrural joint in ankle neutral rotation and maximum internal rotation during either dorsiflexion or plantar flexion was determined using geometric bone models and talocrural joint kinematics data. RESULTS The closest contact area in the talus shifted anteromedially during ankle dorsiflexion-internal rotation, whereas it shifted posteromedially during ankle plantar flexion-internal rotation. The closest contact area in FAI joints was significantly more medial than that in healthy joints during maximum ankle internal rotation and was associated with excessive talocrural internal rotation or inversion. DISCUSSION This study demonstrated abnormal talocrural kinematics and contact mechanics in FAI subjects. Such abnormal kinematics may contribute to abnormal contact mechanics and may increase cartilage stress in FAI joints. LEVEL OF EVIDENCE Therapeutic, Level IV: cross-sectional case-control study.
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Affiliation(s)
- Takumi Kobayashi
- Department of Physical Therapy, Hokkaido Chitose Institute of Rehabilitation Technology, Hokkaido, Japan (TK)Department of Orthopaedics, Kanagawa Prefectural Shiomidai Hospital, Kanagawa, Japan (ES)Department of Medical Radiation, Kanagawa Prefectural Shiomidai Hospital, Kanagawa, Japan (NY)Department of Rehabilitation, Yokohama Sports Medical Center, Kanagawa, Japan (MS)Department of Orthopaedics, Yokohama Sports Medical Center, Kanagawa, Japan (AA, KS)Department of Rehabilitation, Hiroshima International University, Hiroshima, Japan (KG)
| | - Eiichi Suzuki
- Department of Physical Therapy, Hokkaido Chitose Institute of Rehabilitation Technology, Hokkaido, Japan (TK)Department of Orthopaedics, Kanagawa Prefectural Shiomidai Hospital, Kanagawa, Japan (ES)Department of Medical Radiation, Kanagawa Prefectural Shiomidai Hospital, Kanagawa, Japan (NY)Department of Rehabilitation, Yokohama Sports Medical Center, Kanagawa, Japan (MS)Department of Orthopaedics, Yokohama Sports Medical Center, Kanagawa, Japan (AA, KS)Department of Rehabilitation, Hiroshima International University, Hiroshima, Japan (KG)
| | - Naohito Yamazaki
- Department of Physical Therapy, Hokkaido Chitose Institute of Rehabilitation Technology, Hokkaido, Japan (TK)Department of Orthopaedics, Kanagawa Prefectural Shiomidai Hospital, Kanagawa, Japan (ES)Department of Medical Radiation, Kanagawa Prefectural Shiomidai Hospital, Kanagawa, Japan (NY)Department of Rehabilitation, Yokohama Sports Medical Center, Kanagawa, Japan (MS)Department of Orthopaedics, Yokohama Sports Medical Center, Kanagawa, Japan (AA, KS)Department of Rehabilitation, Hiroshima International University, Hiroshima, Japan (KG)
| | - Makoto Suzukawa
- Department of Physical Therapy, Hokkaido Chitose Institute of Rehabilitation Technology, Hokkaido, Japan (TK)Department of Orthopaedics, Kanagawa Prefectural Shiomidai Hospital, Kanagawa, Japan (ES)Department of Medical Radiation, Kanagawa Prefectural Shiomidai Hospital, Kanagawa, Japan (NY)Department of Rehabilitation, Yokohama Sports Medical Center, Kanagawa, Japan (MS)Department of Orthopaedics, Yokohama Sports Medical Center, Kanagawa, Japan (AA, KS)Department of Rehabilitation, Hiroshima International University, Hiroshima, Japan (KG)
| | - Atsushi Akaike
- Department of Physical Therapy, Hokkaido Chitose Institute of Rehabilitation Technology, Hokkaido, Japan (TK)Department of Orthopaedics, Kanagawa Prefectural Shiomidai Hospital, Kanagawa, Japan (ES)Department of Medical Radiation, Kanagawa Prefectural Shiomidai Hospital, Kanagawa, Japan (NY)Department of Rehabilitation, Yokohama Sports Medical Center, Kanagawa, Japan (MS)Department of Orthopaedics, Yokohama Sports Medical Center, Kanagawa, Japan (AA, KS)Department of Rehabilitation, Hiroshima International University, Hiroshima, Japan (KG)
| | - Kuniaki Shimizu
- Department of Physical Therapy, Hokkaido Chitose Institute of Rehabilitation Technology, Hokkaido, Japan (TK)Department of Orthopaedics, Kanagawa Prefectural Shiomidai Hospital, Kanagawa, Japan (ES)Department of Medical Radiation, Kanagawa Prefectural Shiomidai Hospital, Kanagawa, Japan (NY)Department of Rehabilitation, Yokohama Sports Medical Center, Kanagawa, Japan (MS)Department of Orthopaedics, Yokohama Sports Medical Center, Kanagawa, Japan (AA, KS)Department of Rehabilitation, Hiroshima International University, Hiroshima, Japan (KG)
| | - Kazuyoshi Gamada
- Department of Physical Therapy, Hokkaido Chitose Institute of Rehabilitation Technology, Hokkaido, Japan (TK)Department of Orthopaedics, Kanagawa Prefectural Shiomidai Hospital, Kanagawa, Japan (ES)Department of Medical Radiation, Kanagawa Prefectural Shiomidai Hospital, Kanagawa, Japan (NY)Department of Rehabilitation, Yokohama Sports Medical Center, Kanagawa, Japan (MS)Department of Orthopaedics, Yokohama Sports Medical Center, Kanagawa, Japan (AA, KS)Department of Rehabilitation, Hiroshima International University, Hiroshima, Japan (KG)
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