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Heifner JJ, Lacau GE, Forro SD, Davis TA, Mercer DM, Rubio F. The impact of anatomic alignment on radiocapitellar pressure following radial head arthroplasty. J Shoulder Elbow Surg 2024:S1058-2746(24)00244-1. [PMID: 38609004 DOI: 10.1016/j.jse.2024.02.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 02/19/2024] [Accepted: 02/24/2024] [Indexed: 04/14/2024]
Abstract
BACKGROUND The incidence of radial head fractures is increasing, and radial head arthroplasty (RHA) is being more frequently used as treatment for irreparable fractures. Our objective was to compare radiocapitellar pressure between the native joint and 2 radial head prosthesis conditions: (1) a prosthetic head that was aligned to the forearm axis of rotation and (2) the same prosthesis with an axisymmetric nonaligned head. METHODS Ten cadaveric specimens received a pressfit radial head prosthesis (Align; Skeletal Dynamics) for both prosthetic testing conditions. Anatomic alignment (AL) was defined as the prosthetic head aligned to the forearm axis of rotation. Axisymmetric alignment (AX) was defined as the prosthetic radial head aligned to the axis of the prosthetic stem. Axial load was applied with the elbow in extension and the forearm pronated. Data were collected using a Tekscan 4000 sensor. RESULTS The mean pressure in the AL and AX groups were significantly higher than the mean pressure in the native joint. Compared with the native joint, the mean pressure was 19% higher in the AL group and 56% higher in the AX group. Peak pressure beyond 5 MPa occurred in 0 specimens in the native joint group, in 1 specimen (10%) in the AL group, and in 5 specimens (50%) in the AX group. DISCUSSION Our results demonstrated that a pressfit radial head prosthesis aligned with the forearm axis of rotation yields capitellar pressures that were more similar to the native condition than a nonaligned pressfit prosthesis. These findings suggest that anatomic alignment may optimize capitellar wear properties, improving the long-term durability of radial head arthroplasty.
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Affiliation(s)
| | | | - Stephen D Forro
- Department of Orthopedic Surgery, Larkin Hospital, Miami, FL, USA
| | - Ty A Davis
- Department of Orthopedic Surgery, Larkin Hospital, Miami, FL, USA
| | - Deana M Mercer
- Department of Orthopaedics, University of New Mexico, Albuquerque, NM, USA
| | - Francisco Rubio
- Department of Orthopedic Surgery, Larkin Hospital, Miami, FL, USA
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Tsai CC, Chiang YP. The Relationship between the Bevel of the Radial Head Epiphysis and the Posterior Synovial Fringe During Rotation of the Elbow: An Ultrasonography Study with Possible Implications Regarding the Pathophysiology of Nursemaid's Elbow. J Pediatr Orthop 2024; 44:e131-e137. [PMID: 37820066 PMCID: PMC10766089 DOI: 10.1097/bpo.0000000000002550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
BACKGROUND Nursemaid's elbow is the most common upper extremity injury in children under 5 years of age. However, the exact pathomechanism underlying the nursemaid's elbow remains elusive, and approximate one-third of patients present with a nonclassical history. Using a high-frequency ultrasound probe, we attempted to determine the relationship between the anterior edge of the posterior synovial fringe and the peripheral rim of the radial head epiphysis during rotation. It is possible that the primary reason for the nursemaid's elbow is due to the pronator position. METHODS Twenty-one patients had a history of nursemaid's elbow and had a successful reduction before enrollment in this study. A high-frequency linear array 6 to 24 MHz hockey stick transducer was used to detect small morphologic changes in the peripheral rim of the radial head epiphysis and the posterior synovial fringe during rotation of the capitellum-radial joint. RESULTS In complete pronation, the anterior edge of the posterior synovial fringe contacts the beveled articular surface of the radial head peripheral rim in all 21 patients. In neutral and complete supination, the anterior edge of the posterior synovial fringe contacts the convexly nonarticular surface of the radial head peripheral rim and extends deep into the foveal radius. The posterior synovial fringe and the capsule-aponeurotic membrane were tightened in passive pronation in all 21 cases. The posterior synovial fringe and the capsule-aponeurosis membrane were all loose in the neutral and supination positions. CONCLUSION The anterior edge of the posterior synovial fringe touches the beveled peripheral rim of the radial head epiphysis during complete pronation, and the tension of the lateral collateral ligament complex during pronation may further cause unstable conditions of the anterior edge of the posterior synovial fringe. We hypothesized that the beveled peripheral rim of the radial epiphysis and its relationship with the anterior edge of the posterior synovial fringe could be the reason why nursemaid's elbow only occurs while the elbow is in the pronator position.
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Affiliation(s)
| | - Yi-Pin Chiang
- Mackay Memorial Hospital, Taipei City, Taiwan, Republic of China
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Elfar J, Caldwell M, Mason R, Schaffer J, Koroneos Z, Maqsoodi N, Osman WS, Olles M. Ulnohumeral joint static cartilage compression is affected by radial head implant size. Clin Biomech (Bristol, Avon) 2023; 109:105290. [PMID: 33610388 DOI: 10.1016/j.clinbiomech.2021.105290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 01/22/2021] [Accepted: 01/27/2021] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Radiocapitellar joint arthroplasty is a commonly performed procedure, which often leads to early failure or instability. Few studies assess the effect of radiocapitellar joint arthroplasty on the ulnohumeral joint. We hypothesized that static forces of contact (compressing cartilage, or cartilage relaxation contact force) would reveal the effect of varying radial head implant size and elbow position on the ulnohumeral joint. METHODS A minimally-invasive method of measuring cartilage relaxation contact force was utilized in 10 fresh-frozen human cadaveric specimens that did not require significant dissection or intraarticular sensor placement. Specimens were rigidly fixed in various positions of elbow flexion and forearm pronosupination with increasing radial head implant lengths. Uniaxial distracting forces were applied and displacement was repeatedly measured with resultant best-fit polynomial curves to determine inflections corresponding to the force required to overcome static cartilage relaxation as in previous work. FINDINGS Baseline mean (intra-cadaver) cartilage relaxation contact force was 11.8 N (standard error of the mean = 0.3) at 90° of elbow flexion and neutral rotation. There was little variation within specimens (Intraclass correlation coefficient > 0.94). Cartilage relaxation contact force increased at the ulnohumeral joint with radial head implant overstuffing (> 4 mm, P < 0.05) and elbow flexion (120°, P < 0.001). Pronosupination altered cartilage relaxation contact force in an implant-length independent manner (P < 0.05). INTERPRETATION Radiocapitellar joint arthroplasty implant length and elbow joint position independently contribute to increased cartilage relaxation contact force at the ulnohumeral joint. This further supports attempts at anatomic reconstruction of the radiocapitellar joint to prevent pathologic ulnohumeral joint loading.
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Affiliation(s)
- John Elfar
- The Pennsylvania State University, Center for Orthopaedic Research and Translational Science, 500 University Drive, H089 Hershey, PA 17033, USA.
| | - Michael Caldwell
- Rochester Institute of Technology, Mechanical & Manufacturing Technology, 78 Lomb Memorial Drive, Rochester, NY 14623, USA
| | - Robert Mason
- Tidewater Orthopaedics, 901 Enterprise Pkwy 900, Hampton, VA 23666, USA.
| | - Joseph Schaffer
- Hughston Clinic Orthopaedics at TriStar Centennial Medical Center, 2400 Patterson Street, Suite 300, Nashville, TN 37203, USA.
| | - Zachary Koroneos
- The Pennsylvania State University, Center for Orthopaedic Research and Translational Science, 500 University Drive, H089 Hershey, PA 17033, USA.
| | - Noorullah Maqsoodi
- Rochester Institute of Technology, Mechanical & Manufacturing Technology, 78 Lomb Memorial Drive, Rochester, NY 14623, USA.
| | - Walid S Osman
- Helwan University, Orthopaedic Surgery Department, 8 st. 3 Zahraa Helwan, Cairo 11733, Egypt.
| | - Mark Olles
- Rochester Institute of Technology, Mechanical & Manufacturing Technology, 78 Lomb Memorial Drive, Rochester, NY 14623, USA.
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Kwak JM, Lee KW, Jung GH, Kholinne E, Hwang SJ, Koh KH, Jeon IH. Biomechanical impact of elbow motion in elbow stiffness. INTERNATIONAL ORTHOPAEDICS 2023:10.1007/s00264-023-05781-2. [PMID: 37010561 DOI: 10.1007/s00264-023-05781-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 03/13/2023] [Indexed: 04/04/2023]
Abstract
BACKGROUND A mechanical block in the elbow due to osteophytes in the olecranon fossa is a common clinical symptom for elbow stiffness. PURPOSE/HYPOTHESIS This study aims to understand the biomechanical characteristics or changes in the stiff elbow in the resting (or neutral) and swing position of the arm using a cadaveric model. The hypotheses included the following: (1) a difference exists in the articular contact pressure of the elbow by comparing the non-stiff and stiff models in in vivo studies; (2) the degree of stiffness would affect the increase of the joint loading of the elbow. STUDY DESIGN Controlled laboratory study, cadaveric study. METHODS Eight fresh-frozen specimens from individuals of both sexes were included in the biomechanical study. The specimen was mounted on a custom-designed jig system with gravity-assisted muscle contracture to mimic the elbow in a standing position. The elbow was tested in two conditions (the resting and passive swing). Contact pressure was recorded for three seconds in the resting position, which was the neutral position of the humerus. By dropping the forearm from 90° of the elbow flexion, the passive swing was performed. The specimens were tested sequentially in three stages of stiffness (stage 0, no stiffness; stage 1, 30° of extension limitation; and stage 2, 60° of extension limitation). After data collection was completed in stage 0, a stiff model was sequentially created for each stage. The stiff model of the elbow was created by blocking the olecranon by inserting a 2.0 K-wire into the olecranon fossa horizontally with the intercondylar axis. RESULTS The mean contact pressures were 279 ± 23, 302 ± 6, and 349 ± 23 kPa in stages 0, 1, and 2, respectively. The increases in the mean contact pressure in stages 2 versus 0 were significant (P < 0.0001). The mean contact pressures were 297 ± 19, 310 ± 14, and 326 ± 13 kPa in stages 0, 1, and 2, respectively. The peak contact pressures were 420 ± 54, 448 ± 84, and 500 ± 67 kPa in stages 0, 1, and 2, respectively. The increases in mean contact pressure in stage 2 versus 0 were significant (P = 0.039). The increases in peak contact pressure in stages 0 versus 2 were significant (P = 0.007). CONCLUSIONS The elbow bears the load created by gravity and muscle contracture in the resting and swing motion. Moreover, extension limitation of stiff elbow increases the load bearing in the resting position and swing motion. Careful surgical management should be considered for meticulous clearance of bony spur around olecranon fossa to resolve the extension limitation of the elbow.
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Affiliation(s)
- Jae-Man Kwak
- Department of Orthopedic Surgery, College of Medicine, Uijeongbu Eulji Medical Center, Eulji University, Uijeongbu, South Korea
| | - Kwang Won Lee
- Shoulder and Elbow Clinic, Daejeon Woori Hospital, Daejeon, South Korea
| | - Gu-Hee Jung
- Department of Orthopedic Surgery, College of Medicine, Gyeongsang National University, Gyeongsang National University Changwon Hospital, Changwon, Republic of Korea
| | - Erica Kholinne
- Department of Orthopedic Surgery, Faculty of Medicine, Universitas Trisakti, St Carolus Hospital, Jakarta, Indonesia
| | - Seung Jun Hwang
- Department of Anatomy, College of Medicine, Ulsan University, Seoul, Korea
| | - Kyoung Hwan Koh
- Department of Orthopedic Surgery, College of Medicine, Asan Medical Center, Ulsan University, Seoul, South Korea
| | - In-Ho Jeon
- Department of Orthopedic Surgery, College of Medicine, Asan Medical Center, Ulsan University, Seoul, South Korea.
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Thyagarajan DS. Radial head replacement - A comprehensive review. J Orthop 2023; 36:51-56. [PMID: 36632343 PMCID: PMC9827028 DOI: 10.1016/j.jor.2022.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 12/04/2022] [Accepted: 12/05/2022] [Indexed: 12/23/2022] Open
Abstract
Background Radial head fractures represent 1-4% of all adult fractures and 1/3rd of elbow fractures (Kaas et al., 2010). Radial head is an important secondary stabilier of the elbow. The aim of the treatment of radial head fractures is to achieve stability and good functional outcome. Radial head replacement (RHR) is indicated when robust reconstruction and fixation of the fracture fragments is not possible. Methods This article explores history and evolution, anatomical considerations, biomechanics, implant designs, indications, surgical outcomes and controversies in radial head replacement based on current evidence. Results There is a wide range of RHR designs available without conclusive evidence to support the superiority of one design over the other. Ranges of motion, functional outcomes and complication were comparable among different designs with a high incidence of complications reported in many studies. Conclusion RHR remains a good option in unreconstructible radial head fractures, with potential to regain excellent function. It is imperative to continue with the quest to innovate and improve on current designs, to reduce complications in the long term.
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Affiliation(s)
- David S. Thyagarajan
- Consultant Trauma & Orthopaedic Surgeon, Shoulder & Elbow Unit, Northern General Hospital, Sheffield Teaching Hospitals, NHS Foundation Trust, Herries Road, Sheffield, NG5 7AU, United Kingdom
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Kwak JM, Rotman D, Lievano JR, Xue M, O'Driscoll SW. The role of the lateral part of the distal triceps and the anconeus in varus stability of the elbow: a biomechanical study. J Shoulder Elbow Surg 2023; 32:159-167. [PMID: 36167289 DOI: 10.1016/j.jse.2022.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 07/26/2022] [Accepted: 08/11/2022] [Indexed: 02/01/2023]
Abstract
BACKGROUND The role of the lateral part of the distal triceps as a stabilizer in the lateral collateral ligament-deficient elbow and whether its effect in improving the stability is independent of that of the anconeus are unclear. METHODS Seven cadaveric elbows were tested under gravity varus stress using a custom-made machine designed to simulate muscle loads while allowing passive flexion of the elbow. An injury model was created by sectioning the lateral collateral ligament and sparing the common extensor origin. The lateral part of the distal triceps tendon was loaded sequentially with 0 N, 10 N, 25 N, and 40 N. Each stage of the lateral part of the distal triceps loading was tested with the anconeus unloaded (inactive) or with a 25-N load applied (active). Articular contact pressures on the coronoid, the medial facet, and the lateral facet were collected and processed using Tekscan sensors and software. RESULTS A significant decrease in the mean coronoid contact pressure was seen with sequential loading of the lateral part of the distal triceps (P < .001). The ratio of medial to lateral facet contact pressures significantly decreased with sequential loading of the lateral part of the distal triceps (P < .001), indicating a better distribution of the contact pressure between the medial and lateral facets as the lateral part of the distal triceps was loaded. These effects were statistically significant, both with and without anconeus loading. There was no significant modification of the effect of the lateral part of the distal triceps loading on the contact pressure by the anconeus loading (P = .47). However, with active anconeus loading, the contact pressure and the ratio of medial to lateral facet contact pressures were significantly lower for any stage of lateral triceps loading (P < .001), indicating a synergistic effect of the anconeus. CONCLUSIONS In a lateral collateral ligament-deficient elbow, the lateral part of the distal triceps loading prevents the increased contact pressure on the coronoid under varus stress and improves the distribution of contact pressures on the coronoid. Anconeus loading further decreases and improves the distribution of the contact pressures; however, its effect is independent of that of the lateral part of the distal triceps. These results substantiate a role of the lateral part of the distal triceps as a dynamic constraint against elbow varus and have clinical implications for prevention and rehabilitation of elbow instability.
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Affiliation(s)
- Jae-Man Kwak
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Department of Orthopedic Surgery, Uijeongbu Eulji Medical Center, College of Medicine, Eulji University, Uijeongbu, Republic of Korea
| | - Dani Rotman
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Division of Orthopaedic Surgery, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | | | - Mingqiang Xue
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Department of Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Qingxiu District of Nanning City, Guangxi, China
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Kwak JM, Rotman D, Lievano JR, Fitzsimmons JS, O'Driscoll SW. The role of the lateral collateral ligament-capsule complex of the elbow under gravity varus. J Shoulder Elbow Surg 2023; 32:150-158. [PMID: 36167291 DOI: 10.1016/j.jse.2022.08.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 07/26/2022] [Accepted: 08/11/2022] [Indexed: 02/01/2023]
Abstract
BACKGROUND The lateral collateral ligament complex along with the capsule is likely to be at risk during arthroscopic extensor carpi radialis brevis release for lateral epicondylitis. We hypothesized that disruption of the lateral collateral ligament-capsule complex (LCL-cc) would increase the mean contact pressure on the coronoid under gravity varus. MATERIALS AND METHODS Eight cadaveric elbows were tested via gravity varus and weighted varus (2 Nm) stress tests using a custom-made machine designed to simulate muscle loads while allowing passive flexion of the elbow. Mean articular surface contact pressure data were collected and processed using intra-articular thin-film sensors and software. Sequential testing was performed on each specimen from stage 0 to stage 3 (stage 0, intact; stage 1, release of anterior one-third of LCL-cc; stage 2; release of anterior two-thirds of LCL-cc; and stage 3, release of entire LCL-cc). The mean contact pressure on the coronoid and the mean ratio of contact pressure on the medial coronoid to that on the lateral coronoid (M/L ratio) were used for comparisons among the stages and the intact elbow. RESULTS The overall mean contact pressure significantly increased in stage 2 (P = .0004 in gravity varus and P = .0001 in weighted varus) and stage 3 (P < .0001 in gravity varus and P < .0001 in weighted varus) compared with that in stage 0. In contrast, release of the anterior one-third of the LCL-cc (stage 1) did not significantly increase the mean contact pressure on the coronoid in any degree of flexion under gravity varus (P = .09) or weighted varus loading (P = .6). The M/L ratio difference between stage 0 and stage 1 was 1.1 ± 1.1 under gravity varus (P = .8) and 2.1 ± 1.0 under weighted varus (P = .2). The overall M/L ratios in stage 2 and stage 3 were significantly higher than those seen in stage 0 under gravity varus (P = .04 in stage 2 and P = .02 in stage 3) and weighted varus (P = .006 in stage 2 and P < .0001 in stage 3). CONCLUSIONS Loss of the anterior two-thirds or more of the LCL-cc significantly increases the overall mean contact pressure on the coronoid, especially the medial coronoid, under both gravity varus and weighted varus. The LCL-cc also plays a role in the distribution of coronoid contact pressure against gravity varus loads.
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Affiliation(s)
- Jae-Man Kwak
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Department of Orthopedic Surgery, Uijeongbu Eulji Medical Center, College of Medicine, Eulji University, Uijeongbu, Republic of Korea
| | - Dani Rotman
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Division of Orthopaedic Surgery, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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Sun W, Jiang X, Zha Y, Gong M, Li T, Hua K, Xiao D, Lu S. Relationship between measurements of ipsilateral capitellum and prosthetic radial head size. J Orthop Surg Res 2022; 17:496. [DOI: 10.1186/s13018-022-03393-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 11/06/2022] [Indexed: 11/20/2022] Open
Abstract
Abstract
Background
Selecting the correct size of head component is challenging in radial head arthroplasty, particularly in comminuted fractures. This study aimed to investigate the relationship between measurements of the ipsilateral capitellum and the prosthetic radial head size, which may be used to predict the size of the radial head prosthesis preoperatively.
Methods
Our study enrolled all patients who underwent radial head arthroplasty at Beijing Jishuitan Hospital. Demographic, injury-related and radiographic data were collected. The prosthetic radial head size was recorded from the surgical notes. Three-dimensional models of preoperative CT scans were reconstructed, on which the lateral capitellar diameter, the capitellar width and the width between the capitellum and trochlea were measured. The correlations between measurements of the ipsilateral capitellum and the prosthetic radial head size were evaluated, and linear regression equations were established.
Results
The study enrolled 37 patients, with an average age of 42.8 ± 11.5 years and a male–female ratio of 20:17. The median diameter of the radial head prostheses was 22 (20, 22) mm. The average lateral capitellar diameter was 20.71 ± 1.93 mm, the mean capitellar width was 14.90 ± 1.40 mm, and the mean width between the capitellum and trochlea was 19.29 ± 1.78 mm. The lateral capitellar diameter (R = 0.820, P < 0.001), the capitellar width (R = 0.726, P < 0.001) and the width between the capitellum and trochlea (R = 0.626, P < 0.001) were significantly positively correlated with the size of the radial head prosthesis. The linear regression equation between the lateral capitellar diameter and the size of the radial head prosthesis was calculated and defined as follows: D = 7.44 + 0.67*d (D: diameter of radial head prosthesis; d: lateral capitellar diameter; and adjusted R2 = 0.719, P < 0.001).
Conclusions
There are positive correlations between the anatomical parameters of the ipsilateral capitellum and the prosthetic radial head size. The lateral capitellar diameter can be measured on three-dimensional CT preoperatively to predict the size of the radial head prosthesis intraoperatively.
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Cherches MF, Halvorson R, Lalchandani G, Kandemir U, Lattanza LL, Lee N. Anatomic Radial Head Arthroplasty: The Importance of Implant Angle. J Hand Surg Am 2022; 47:534-539. [PMID: 35397935 DOI: 10.1016/j.jhsa.2022.02.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 12/16/2021] [Accepted: 02/02/2022] [Indexed: 02/02/2023]
Abstract
PURPOSE Multifragmentary radial head and neck fractures not amenable to open reduction and internal fixation are usually treated with radial head arthroplasty (RHA). Although the optimal implant design is still subject to debate, anatomic designs are common. We hypothesized that positioning of the implant leading to increased radial stem angle (RSA) (angle of the RHA stem with respect to the proximal radius shaft, RSA) in anatomic RHA designs will contribute to failures. The aim of this study was to characterize the risk of RHA failure with respect to the stem angle in anatomic RHA design. METHODS A retrospective review of patients who underwent anatomic RHA for acute fractures between 2006 and 2019 at 2 academic centers was conducted. Initial postoperative elbow radiographs were reviewed to measure RSA on the anterior-posterior and lateral views. Radiolucency, stress shielding, and radiocapitellar arthritis were also evaluated. Implant failure was defined as prosthesis removal or revision. RESULTS Implant failure was associated with significantly larger lateral RSA than that in intact implants. Increasing stem shaft angle on a lateral radiograph was associated with decreased implant survival. Radiolucency, stress shielding, and radiocapitellar arthritis were similar between the 2 groups. CONCLUSIONS Anatomic radial head implants are commonly used; however, the importance of prosthesis positioning, specifically that of the stem within the proximal radius, remains understudied. Higher RSA is associated with the risk of implant failure and need for revision. TYPE OF STUDY/LEVEL OF EVIDENCE Prognostic IV.
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Affiliation(s)
- Matthew F Cherches
- Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, CA.
| | - Ryan Halvorson
- Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, CA
| | - Gopal Lalchandani
- Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, CA
| | - Utku Kandemir
- Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, CA
| | | | - Nicolas Lee
- Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, CA
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Abstract
BACKGROUND The management of severe radiocapitellar joint pathologies in young patients is challenging. Radial head arthroplasty (RHA) is a treatment option in the adult population, but most surgeons avoid implementing it in younger patients, and there are no published results for patients younger than 16 years. METHODS Our retrospective cohort describes 5 patients (4 male 1 female) who underwent cementless modular RHA at an average age of 14 years (range: 13 to 15). The preoperative diagnoses were post-traumatic radiocapitellar incongruity and arthrosis because of previous Salter-Harris type 3 or 4 fractures of the radial head in 3 cases; and axial instability of the forearm following failed radial head excision in 2 cases. Because of the complexity of the elbow pathology in these cases, all underwent concomitant procedures including: contracture release (5 cases), corrective ulnar osteotomy (2 cases), distal ulnar shortening osteotomy, excision of radioulnar synostosis, microfracture of the capitellum, and partial excision of the medial triceps (1 case each). Collected data included patient-reported outcomes, visual analog scale pain score at rest and during physical activity and radiographic assessment of arthritis and prosthesis loosening. RESULTS Average clinical follow-up was 8 years (range: 3 to 13). All 5 patients were pain-free at rest, and 3 reported moderate elbow pain (visual analog scale: 5 to 6) with physical activity. At an average radiographic follow-up of 3 years (range: 0.5 to 5), 3 patients showed mild progression of elbow arthrosis, but there were no signs of progressive capitellar erosion or implant loosening. Only 1 complication was noted-development of heterotopic ossification in 1 patient, which required open heterotopic ossification excision and contracture release 2 years following the RHA. None of the patients required prosthesis revision or removal. CONCLUSION RHA was successful in improving pain and axial forearm stability in this very small series of adolescent patients. Concerns regarding long-term longevity and complications still exist. Considering the lack of other reliable treatment options, RHA may be indicated in this challenging patient population. LEVEL OF EVIDENCE Level IV: therapeutic study-case series.
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Giannicola G, Giulivi A, Polimanti D. Correlations Between Radial Head Diameters and Humeral Articular Dimensions: Bilateral MRI Morphometric Analysis on 39 Healthy Subjects. J Hand Surg Am 2021; 46:814.e1-814.e8. [PMID: 33722472 DOI: 10.1016/j.jhsa.2020.11.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 10/07/2020] [Accepted: 11/20/2020] [Indexed: 02/02/2023]
Abstract
PURPOSE Choosing the correct size of head component in radial head arthroplasty is often challenging, particularly in comminuted fractures, deformities, and revision surgery. The main aim of this study was to investigate possible correlations between radial head diameters and the morphometric parameters of the articular distal humerus in order to find mathematical equations that may be used to infer radial head dimensions indirectly. METHODS We performed bilateral elbow magnetic resonance imaging on 39 healthy young subjects, comprising 19 women and 20 men, with a mean age of 28 years (range, 21-32 years). The following measurements, which included cartilage thickness, were calculated on the axial plane: maximum (Dmax) and minimum (Dmin) radial head diameters, capitellum width, capitellum to lateral trochlear ridge width (CAP-TROCHridge), humeral articular width (HUMwidth), capitellum radius of curvature, and lateral, medial, and total trochlear width. The anteroposterior diameters of the capitellum, trochlear sulci, and lateral and medial trochlear ridges were measured on the sagittal plane. RESULTS CAP-TROCHridge and HUMwidth were found to be the parameters most strongly correlated with the radial head diameters. Four mathematical equations that allowed Dmax and Dmin to be calculated with an average residual error less than 1 mm, were obtained. The intraclass coefficient was greater than 0.95 for all the measurements. CONCLUSIONS Radial head diameters can be accurately inferred from 2 humeral dimensions by magnetic resonance imaging. The HUMwidth, which is not influenced by cartilage thickness, may be useful for planning with preoperative imaging because it can also be calculated by computed tomography scan, whereas CAP-TROCHridge, which is influenced by cartilage thickness, might be useful for direct intraoperative measurement. TYPE OF STUDY/LEVEL OF EVIDENCE Diagnostic III.
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Affiliation(s)
- Giuseppe Giannicola
- Department of Anatomical, Histological, Forensic Medicine and Orthopedics Sciences, "Sapienza" University of Rome, Umberto I Policlinico of Rome, Rome, Italy
| | - Andrea Giulivi
- Department of Anatomical, Histological, Forensic Medicine and Orthopedics Sciences, "Sapienza" University of Rome, Umberto I Policlinico of Rome, Rome, Italy
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Ramazanian T, Müller-Lebschi JA, Yao Chuang M, Vaichinger AM, Fitzsimmons JS, O’Driscoll SW. Effect of incremental increase in radial neck height on coronoid and capitellar contact pressures. Shoulder Elbow 2021; 13:445-450. [PMID: 34394742 PMCID: PMC8355654 DOI: 10.1177/1758573219881772] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 08/28/2019] [Accepted: 09/13/2019] [Indexed: 11/16/2022]
Abstract
BACKGROUND Over-lengthening of the radial neck has been shown to affect ulnohumeral kinematics and has been proposed to affect radiocapitellar pressures. We hypothesized that an incremental increase in radial neck height increases the capitellar contact pressure and reduces the coronoid contact pressure. Knowledge of the effects of over-lengthening is clinically important in preventing pain and degenerative changes due to overstuffing. METHODS Six human cadaveric elbows were prepared on a custom-designed apparatus simulating muscle loads and passive flexion from 0° to 90° under gravity valgus torque while measuring joint contact pressures in this biomechanical study. Each elbow was tested sequentially starting with the intact specimen followed by insertion of a radial head prosthesis with 0, +2, and +4 mm of radial neck height, respectively. RESULTS Capitellar mean contact pressures significantly increased after insertion of +2 and +4 mm radial head prostheses (p < 0.03). The capitellar mean contact pressure with a 0 mm radial head prosthesis was 97 KPa. Insertion of +2 mm and +4 mm radial heads increased mean contact pressures to 391 KPa (p = 0.001) and 619 KPa (p = 0.001), respectively, with 90° of elbow flexion. DISCUSSION Increasing radial prosthesis height by 2 mm significantly increases capitellar contact pressures and reduces coronoid contact pressures.
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Affiliation(s)
- Taghi Ramazanian
- Department of Orthopedics, Biomechanics
Laboratory, Mayo Clinic, Rochester, MN, USA
| | | | - Min Yao Chuang
- Department of Orthopedics, MacKay Memorial
Hospital, Taipei
| | - Anthony M Vaichinger
- Department of Orthopedics, Biomechanics
Laboratory, Mayo Clinic, Rochester, MN, USA
| | - James S Fitzsimmons
- Department of Orthopedics, Biomechanics
Laboratory, Mayo Clinic, Rochester, MN, USA
| | - Shawn W O’Driscoll
- Department of Orthopedics, Biomechanics
Laboratory, Mayo Clinic, Rochester, MN, USA,Shawn W O’Driscoll, Mayo Clinic, 200 First St, SW
Rochester, MN 55905, USA.
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13
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Luenam S, Bantuchai T, Kosiyatrakul A, Chanpoo M, Phakdeewisetkul K, Puncreobutr C. Precision of computed tomography and cartilage-reproducing image reconstruction method in generating digital model for potential use in 3D printing of patient-specific radial head prosthesis: a human cadaver study. 3D Print Med 2021; 7:3. [PMID: 33507428 PMCID: PMC7842042 DOI: 10.1186/s41205-021-00093-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 01/10/2021] [Indexed: 11/28/2022] Open
Abstract
Background A prosthetic replacement is a standard treatment for an irreparable radial head fracture; however, the surface mismatch of the commercially available designs is concerned for the long-term cartilage wear. The patient-specific implant created from 3D printing technology could be favorable in replicating the normal anatomy and possibly reduce such sequela. Our study aimed to assess the precision of the computed tomography (CT) and cartilage-reproducing image reconstruction method (CIRM) in generating digital models for potentially use in manufacturing the patient-specific prosthesis from 3D printing. Methods Eight intact elbows (3 right and 5 left) from 7 formalin-embalmed cadavers (4 males and 3 females) with mean age of 83 years (range, 79–94 years) were used for this study. Computerized 3D models were generated from CT, and CIRM. The cartilage-reproducing image reconstruction method has compensated the cartilage profile based on the distance between the subchondral surfaces of the radial head and surrounding bones in CT images. The models of actual radial head geometry used as the gold standard was generated from CT arthrography (CTA). All models of each specimen were matched by registering the surface area of radial neck along with the tuberosity. The difference of head diameter, head thickness, and articular disc depth among three models was evaluated and analyzed by Friedman ANOVA and multiple comparison test using Bonferroni method for statistical correction. A p-value of less than 0.01 was considered statistically significant. The difference of overall 3D geometry was measured with the root mean square of adjacent point pairs. Results The analysis displayed the difference of diameter, thickness, and disc depth across the models (p< 0.01). Pairwise comparisons revealed statistically significant difference of all parameters between CTA models and CT models (p< 0.01) whereas no difference was found between CTA models and CIRM models. The mean difference of overall 3D geometry between CTA models and CT models was 0.51±0.24 mm, and between CTA models and CIRM models was 0.24±0.10 mm. Conclusions CIRM demonstrated encouraging results in reestablish the normal anatomy and could be potentially used in production process of 3D printed patient-specific radial head prosthesis.
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Affiliation(s)
- Suriya Luenam
- Department of Orthopaedics, Phramongkutklao Hospital and College of Medicine, 315 Ratchawithi Road, Bangkok, 10400, Thailand.
| | - Theeraset Bantuchai
- Department of Orthopaedics, Phramongkutklao Hospital and College of Medicine, 315 Ratchawithi Road, Bangkok, 10400, Thailand
| | - Arkaphat Kosiyatrakul
- Department of Orthopaedics, Phramongkutklao Hospital and College of Medicine, 315 Ratchawithi Road, Bangkok, 10400, Thailand
| | - Malee Chanpoo
- Department of Anatomy, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
| | | | - Chedtha Puncreobutr
- Advanced Materials Analysis Research Unit, Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand
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14
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van Riet RP, van den Bekerom MPJ, Van Tongel A, Spross C, Barco R, Watts AC. Radial head fractures. Shoulder Elbow 2020; 12:212-223. [PMID: 32565923 PMCID: PMC7285971 DOI: 10.1177/1758573219876921] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 06/16/2019] [Accepted: 08/06/2019] [Indexed: 11/16/2022]
Abstract
The shape and size of the radial head is highly variable but correlates to the contralateral side. The radial head is a secondary stabilizer to valgus stress and provides lateral stability. The modified Mason-Hotchkiss classification is the most commonly used and describes three types, depending on the number of fragments and their displacement. Type 1 fractures are typically treated conservatively. Surgical reduction and fixation are recommended for type 2 fractures, if there is a mechanical block to motion. This can be done arthroscopically or open. Controversy exists for two-part fractures with >2 mm and <5 mm displacement, without a mechanical bloc as good results have been published with conservative treatment. Type 3 fractures are often treated with radial head replacement. Although radial head resection is also an option as long-term results have been shown to be favourable. Radial head arthroplasty is recommended in type 3 fractures with ligamentous injury or proximal ulna fractures. Failure of primary radial head replacement may be due to several factors. Identification of the cause of failure is essential. Failed radial head arthroplasty can be treated by implant removal alone, interposition arthroplasty, revision radial head replacement either as a single stage or two-stage procedure.
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Affiliation(s)
- RP van Riet
- Department of Orthopedic Surgery, Monica Hospital, Antwerp, Belgium,MoRe Foundation, Antwerp, Belgium,Department of Orthopedic Surgery and Traumatology, University Hospital Antwerp, Antwerp, Belgium,RP van Riet, Department of Orthopedic Surgery, Monica Hospital, Stevenslei 20, 2100 Antwerp, Belgium.
| | - MPJ van den Bekerom
- Shoulder and Elbow Unit, Joint Research, Department of Orthopedic Surgery, OLVG, Amsterdam, the Netherlands
| | - A Van Tongel
- Department of Orthopaedics and Traumatology, UZ Gent, Ghent, Belgium
| | - C Spross
- Department of Orthopaedics and Traumatology, Kantonsspital St. Gallen, St. Gallen, Switzerland,Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - R Barco
- Upper Limb Unit, Hospital Universitario La Paz, Madrid, Spain
| | - AC Watts
- Upper Limb Unit, Wrightington Hospital, UK
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15
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Luenam S, Vongvanichvathana A, Kosiyatrakul A, Kongphanich C, Chanpoo M, Koonchornboon T, Phakdeewisetkul K, Lohwongwatana B, Puncreobutr C. Matching precision of the reverse contralateral radial head in generating of the individualized prosthesis from the surface registration in tuberosity-neck and in tuberosity-diaphysis. J Orthop Surg (Hong Kong) 2020; 27:2309499018821774. [PMID: 30798711 DOI: 10.1177/2309499018821774] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
PURPOSE Following the radial head replacement, the surface mismatches between the implants and the morphological characteristics of the original proximal radius decreased contact areas and increased contact forces which is potential for the long-term articulating cartilage wear. Several studies demonstrated that the individualized prosthesis, created from computed tomographic (CT) images of the contralateral side with the reverse engineering technology, may reduce the mismatch. The aim of this study is to demonstrate the matching precision of the reverse contralateral head between the surface registration in tuberosity-neck (TN) area and in tuberosity-diaphysis (TD) area. MATERIALS AND METHODS High-resolution CT scan of 11 pairs of the cadaveric arms was performed. Utilizing advanced image processing techniques, three-dimensional (3-D) models of each specimen was generated. The model of the left side was reversed and matched with the model of the right side in the same cadaver by registering in the area of radial neck along with tuberosity (TN) and in the area of radial tuberosity combined with 2 cm of proximal diaphysis (TD). The alteration of the head diameter, dish diameter, articular depth, head thickness, end-plane angle, offset, and head volume were evaluated and analyzed by paired t-test. RESULTS No statistically significant difference was found in all parameters from both TN and TD registrations ( p < 0.05). CONCLUSION The surface registration in either TN or TD area can generate the statistically symmetrical 3-D model with the original head. The registration in these areas may possibly be used in creating the individualized radial head prosthesis.
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Affiliation(s)
- Suriya Luenam
- 1 Department of Orthopaedics, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
| | - Adigun Vongvanichvathana
- 1 Department of Orthopaedics, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
| | - Arkaphat Kosiyatrakul
- 1 Department of Orthopaedics, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
| | - Chutcharn Kongphanich
- 2 Department of Radiology, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
| | - Malee Chanpoo
- 3 Department of Anatomy, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
| | - Tunyarut Koonchornboon
- 3 Department of Anatomy, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
| | - Kantapat Phakdeewisetkul
- 4 Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand
| | - Boonrat Lohwongwatana
- 4 Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand
| | - Chedtha Puncreobutr
- 4 Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand
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16
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Hemmingsen CK, Thillemann TM, Elmengaard B, de Raedt S, Nielsen ET, Mosegaard SB, Stentz-Olesen K, Stilling M. Elbow Biomechanics, Radiocapitellar Joint Pressure, and Interosseous Membrane Strain Before and After Radial Head Arthroplasty. J Orthop Res 2020; 38:510-522. [PMID: 31595550 DOI: 10.1002/jor.24488] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 09/17/2019] [Indexed: 02/04/2023]
Abstract
Complex radial head fracture and elbow instability can be treated with radial head arthroplasty. Good clinical results have been described after this surgical treatment. However, the revision and complication rate reported in the literature is concerning. This might be due to altered kinematics after radial head arthroplasty. Eight human native elbows were examined with dynamic radiostereometric analysis and compared with a radial head arthroplasty. Translations of the radial head in the x-, y-, and z-directions relative to the humerus and the ulna were measured. The radiocapitellar joint pressure was measured using a pressure sensor. The tension within the interosseous membrane was measured using a custom-made strain gauge. After radial head arthroplasty, the radial head was displaced approximately 1.8 mm medially and 1.4 mm distally at the starting point. During unloaded flexion motion the difference in all translations between the native radial head and the radial head arthroplasty was less than 1 mm (95% confidence interval [CI] ± 0.5 mm) (p = 0.001). With loading the difference was less than 1.5 mm (95% CI ± 1.5 mm) (p = 0.001). The mean difference in radiocapitellar joint contact pressure was less than 0.30 MPa (95% CI ± 0.40 MPa) (p = 0.001) during unloaded flexion motion. There were only submillimetre kinematic changes and small changes in joint pressure and interosseous membrane tension after the insertion of a radial head arthroplasty in an experimental setting. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 38:510-522, 2020.
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Affiliation(s)
- Chalotte K Hemmingsen
- Department of Clinical Medicine, Aarhus University, Groennehaven 25, 8520 Lystrup, Aarhus, Denmark.,Orthopedic Research Unit, Aarhus University Hospital, Aarhus, Denmark
| | - Theis M Thillemann
- Department of Orthopedic Surgery, Shoulder and Elbow Section, Aarhus University Hospital, Aarhus, Denmark
| | - Brian Elmengaard
- Department of Orthopedic Surgery, Shoulder and Elbow Section, Aarhus University Hospital, Aarhus, Denmark
| | | | - Emil T Nielsen
- Department of Clinical Medicine, Aarhus University, Groennehaven 25, 8520 Lystrup, Aarhus, Denmark.,Orthopedic Research Unit, Aarhus University Hospital, Aarhus, Denmark.,Department of Orthopedic Surgery, Hand Section, Aarhus University Hospital, Aarhus, Denmark
| | - Sebastian B Mosegaard
- Department of Clinical Medicine, Aarhus University, Groennehaven 25, 8520 Lystrup, Aarhus, Denmark.,Department of Orthopedic Surgery, Hand Section, Aarhus University Hospital, Aarhus, Denmark
| | | | - Maiken Stilling
- Department of Clinical Medicine, Aarhus University, Groennehaven 25, 8520 Lystrup, Aarhus, Denmark.,Orthopedic Research Unit, Aarhus University Hospital, Aarhus, Denmark.,Department of Orthopedic Surgery, Hand Section, Aarhus University Hospital, Aarhus, Denmark
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17
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Moungondo FGP, Andrzejewski A, van Riet RRP, Feipel V, Rooze M, Schuind FA. Joint contact areas after radial head arthroplasty: a comparative study of 3 prostheses. J Shoulder Elbow Surg 2019; 28:1546-1553. [PMID: 31029518 DOI: 10.1016/j.jse.2019.01.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 01/17/2019] [Accepted: 01/21/2019] [Indexed: 02/01/2023]
Abstract
BACKGROUND Contact stresses of radial head prostheses remain a concern, potentially leading to early capitellar cartilage wear and erosion. In particular, point contact or edge loading could have a detrimental effect. The purpose of this study was to compare 3 different types of radial head prostheses in terms of joint contact areas with each other and with the native situation. The hypothesis was that the joint contact areas would be lower after monopolar arthroplasty. METHODS Seven fresh-frozen cadaveric upper limbs were used. Radiocapitellar contact areas of a monopolar design, a straight-neck bipolar design, and an angled-neck bipolar design were compared with each other and with the native joint. After standardized preparation, polysiloxane was injected into the loaded radiocapitellar joint to create a cast from which the joint contact area was measured. Measurements were performed at 3 angles of elbow flexion and in 3 different forearm positions. RESULTS In the native elbow, contact areas were highest in supination. Elbow flexion had no significant effect on native and prosthetic joint contact areas. Contact areas were decreased for all types of arthroplasties compared with the native joint (from 11% to 53%). No significant contact area difference was found between the 3 designs. However, bipolar prostheses showed lateral subluxation in neutral forearm rotation, resulting in a significant decrease in the contact areas from pronation to the neutral position. CONCLUSIONS All types of radial head prostheses tested showed a significant decrease in radiocapitellar contact area compared with the native joint. Bipolar designs led to subluxation of the radial head, further decreasing radiocapitellar contact.
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Affiliation(s)
- Fabian G P Moungondo
- Department of Orthopaedics and Traumatology, Université Libre de Bruxelles, Erasme University Hospital, Brussels, Belgium; Université Libre de Bruxelles, Brussels, Belgium.
| | - Aurélie Andrzejewski
- Department of Orthopaedics and Traumatology, Université Libre de Bruxelles, Erasme University Hospital, Brussels, Belgium; Université Libre de Bruxelles, Brussels, Belgium
| | | | - Véronique Feipel
- Laboratory of Functional Anatomy, Faculty of Motor Sciences, Université Libre de Bruxelles, Brussels, Belgium; Laboratory of Anatomy, Biomechanics and Organogenesis, Université Libre de Bruxelles, Brussels, Belgium
| | - Marcel Rooze
- Université Libre de Bruxelles, Brussels, Belgium; Laboratory of Functional Anatomy, Faculty of Motor Sciences, Université Libre de Bruxelles, Brussels, Belgium; Laboratory of Anatomy, Biomechanics and Organogenesis, Université Libre de Bruxelles, Brussels, Belgium
| | - Frédéric A Schuind
- Department of Orthopaedics and Traumatology, Université Libre de Bruxelles, Erasme University Hospital, Brussels, Belgium; Université Libre de Bruxelles, Brussels, Belgium
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18
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Sun Y, Hong H, Adikrishna A, Kim YJ, Jeon IH. Contact Mechanics of Anatomic Radial Head Prosthesis: Comparison Between Native Radial Head and Anatomic Radial Head Prostheses in the Dynamic Mode. J Hand Surg Am 2019; 44:517.e1-517.e7. [PMID: 30292716 DOI: 10.1016/j.jhsa.2018.08.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 06/26/2018] [Accepted: 08/08/2018] [Indexed: 02/02/2023]
Abstract
PURPOSE The biomechanical characteristics of anatomic radial head prostheses have not been completely investigated. We compared and analyzed the contact kinematic characteristics of the native radial head and radial head prostheses replicating the native head contour, using a real-time flexion simulation model. METHODS Ten fresh-frozen cadavers were used in this pilot study. A simulating dynamic motion mode from 0° to 130° of elbow flexion was applied. Radiocapitellar contact pressure and area were measured using a real-time digitized pressure sensor. Further, contact area and pressure curves were obtained during flexion, using a motion-tracking device. RESULTS The mean contact area, mean contact pressure, and peak contact pressure of the native radial head and radial head prosthesis were 39 mm2, 0.0078 kgf/mm2, 0.0123 kgf/mm2, and 33 mm2, 0.0093 kgf/dm2, 0.0148 kgf/mm2, respectively. The contact area and pressure curves were parabolic nonlinear for the radial head prosthesis and more linear for the native radial head. CONCLUSIONS The radial head prosthesis mimics the mechanics of the native radial head in terms of mean contact area, mean contact pressure, and peak contact pressure; however, different patterns of contact pressure and area curves during elbow flexion-extension were observed. CLINICAL RELEVANCE We found that the biomechanics of the anatomic radial head prostheses used in the study were similar to those of the native radial head.
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Affiliation(s)
- Yucheng Sun
- Department of Orthopedic Surgery, ASAN Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - Hanpyo Hong
- Department of Orthopedic Surgery, ASAN Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - Arnold Adikrishna
- Department of Orthopedic Surgery, ASAN Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - Yoon-Jeong Kim
- Department of Orthopedic Surgery, ASAN Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - In-Ho Jeon
- Department of Orthopedic Surgery, ASAN Medical Center, College of Medicine, University of Ulsan, Seoul, Korea.
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19
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Sun Y, Adikrishna A, Hong H, Tan J, Jeon IH. Comparison of the biomechanics of radial head prostheses with dynamic loading in the radiocapitellar joint. J Hand Surg Eur Vol 2019; 44:408-413. [PMID: 30744462 DOI: 10.1177/1753193419825526] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We used eight fresh cadaveric elbows to evaluate the biomechanical characteristics of the native radial head, an anatomic radial head prosthesis, and a non-anatomic radial head prosthesis using a dynamic model. The biceps, brachialis, and triceps were attached to pneumatic actuators loaded to mimic muscle force. The radiocapitellar contact pressure and area were measured in real time, and the associated curves were depicted simultaneously. No significant differences in the contact area or associated curves were found between native radial head and the anatomic radial head prosthesis. The contact pressure and associated curve for the anatomic radial head prosthesis were better than those for the non-anatomic radial head prosthesis. We conclude from this study that the contact pressure and area of the elbow with anatomic radial head prosthesis are similar to those of the native radial head. The anatomic radial head prosthesis appears to be more suitable in clinical use.
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Affiliation(s)
- Yucheng Sun
- 1 Department of Orthopaedic Surgery, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea.,2 Department of Hand Surgery, Affiliated Hospital of Nantong University, Nantong, China
| | - Arnold Adikrishna
- 1 Department of Orthopaedic Surgery, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - Hanpyo Hong
- 1 Department of Orthopaedic Surgery, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - Jun Tan
- 2 Department of Hand Surgery, Affiliated Hospital of Nantong University, Nantong, China
| | - In-Ho Jeon
- 1 Department of Orthopaedic Surgery, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
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20
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Wang JQ, Jiang BJ, Guo WJ, Zhao YM. Indirect 3D printing technology for the fabrication of customised β-TCP/chitosan scaffold with the shape of rabbit radial head-an in vitro study. J Orthop Surg Res 2019; 14:102. [PMID: 30975173 PMCID: PMC6460811 DOI: 10.1186/s13018-019-1136-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 03/27/2019] [Indexed: 01/11/2023] Open
Abstract
Background With the development of indirect three-dimensional (3D) printing technology, it is possible to customise individual scaffolds to be used in bone transplantation and regeneration. In addition, materials previously limited to the 3D printing (3DP) process due to their own characteristics can also be used well in indirect 3DP. In this study, customised β-TCP/chitosan scaffolds with the shape of rabbit radial head were produced by indirect 3D printing technology. Methods Swelling ability, porosity, mechanical characterisation, and degradation rate analysis were performed, and in vitro studies were also implemented to evaluate the proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells (MSCs) on the scaffolds. CCK8 cell proliferation assay kit and alkaline phosphatase (ALP) staining solution were used to study cell proliferation and early ALP content at the scaffold surface. Moreover, the osteogenic differentiation of MSCs on scaffolds was also evaluated through the scanning electron microscopy analysis. Results β-TCP/chitosan scaffold has good performance and degradation rate, and in vitro cell experiments also confirm that the scaffold has adequate cytocompatibility and bioactivity. Conclusion This study provides a promising new strategy for the design of customised scaffolds for the repair of complex damaged tissues.
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Affiliation(s)
- Ji-Qi Wang
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109# Xue Yuan Xi Road, Wenzhou, 325000, Zhejiang, China.,Key Laboratory of Orthopedics of Zhejiang Province, Wenzhou, 325000, Zhejiang, China.,The Second School of Medicine, Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China
| | - Bing-Jie Jiang
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109# Xue Yuan Xi Road, Wenzhou, 325000, Zhejiang, China.,Key Laboratory of Orthopedics of Zhejiang Province, Wenzhou, 325000, Zhejiang, China.,The Second School of Medicine, Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China
| | - Wei-Jun Guo
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109# Xue Yuan Xi Road, Wenzhou, 325000, Zhejiang, China
| | - You-Ming Zhao
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109# Xue Yuan Xi Road, Wenzhou, 325000, Zhejiang, China.
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21
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Reattachment of the flexor and extensor tendons at the epicondyle in elbow instability: a biomechanical comparison of techniques. BMC Musculoskelet Disord 2018; 19:432. [PMID: 30509244 PMCID: PMC6278143 DOI: 10.1186/s12891-018-2341-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 11/14/2018] [Indexed: 11/10/2022] Open
Abstract
Background Elbow dislocation represents a common injury, especially in the younger population. If treated surgically, the reattached tendons require a high amount of primary stability to allow for an early rehabilitation to avoid postoperative stiffness. The purpose of this study was to assess the biomechanical properties of a single and a double row technique for reattachment of the common extensor and common flexor muscles origin. We hypothesized that the double row technique would provide greater stability in terms of pullout forces than the single row technique. Methods Twelve cadaveric specimens were randomized into two groups of fixation methods for the common extensor tendon or the common flexor tendon at the elbow (1): a single row technique using two knotted 3.0 mm suture anchors, and (2) a double row technique using an additional knotless 3.5 mm anchor. The repairs were cyclically loaded over 500 cycles at 1 Hz from 10 N to a maximum of 100 N (extensors) or 150 N (flexors), and then pulled to failure. Stiffness and maximum load at failure and mode of failure were recorded and calculated. Results No significant differences in stiffness were observed between the two techniques for both the extensor and flexor reattachment (P = 0.701 and P = 0.306, respectively). The mean maximum load at failure indicated that the double row construct was significantly stronger than the single row construct. This was found to be true for both the extensor and flexor reattachment (213.6; SD 78.7 N versus 384.1; SD 105.6 N, P = 0.010 and 203.7; SD 65.8 N versus 318.0; SD 64.6 N, P = 0.013, respectively). Conclusions The double row technique provides significant greater stability to the reattached common flexor or extensor origin to the medial or lateral epicondyle. Thus, it should be considered in the development of improved repair techniques for stabilizers of the elbow. Study design Controlled laboratory study.
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22
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Abstract
OBJECTIVE To evaluate the effect of intentional undersizing of prosthetic radial head implant diameters on joint contact pressures. METHODS Eight fresh-frozen cadaveric elbows were aligned in neutral extension and loaded with 100 N using a custom testing apparatus. Radiocapitellar contact pressures were recorded using a Tekscan thin-film pressure sensor. Prosthetic radial head replacement was performed with 2 prostheses: the Anatomic Radial Head and the Evolve Proline Radial Head prostheses. Each design was sized according to the manufacturer's recommendations and then again using 2-mm smaller radial heads. RESULTS Average and peak pressures were significantly higher with the Evolve than the Anatomic prostheses (P < 0.03 and 0.02, respectively). Peak pressures decreased from 4.2 ± 0.5 MPa to 2.9 ± 0.3 MPa for the Anatomic Radial Heads and from 5.6 ± 0.5 MPa to 3.9 ± 0.6 MPa when the Evolve Radial Heads were undersized by 2 mm. The mean pressures of the Anatomic Radial Heads (1.4 ± 0.1 MPa) did not change significantly with undersizing (1.3 ± 0.1 MPa, P = 0.12), whereas the mean pressures of the Evolve Radial Heads (1.6 ± 0.1 MPa) were significantly reduced with undersizing (1.4 ± 0.1 MPa, P < 0.02). CONCLUSION Both mean and peak pressures were initially high for the Evolve Radial Head sized based on the short axis diameter and were improved with further undersizing by 2 mm. Peak, but not mean, contact pressures were improved by undersizing the Anatomic prosthesis based on the long axis diameter. CLINICAL RELEVANCE These findings support the clinical recommendation of some surgeons to undersize the Evolve prosthesis by 2-mm smaller diameter than the current manufacturer's suggestion and give reason to consider doing the same for the Anatomic prosthesis.
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Ramazanian T, Müller-Lebschi JA, Chuang MY, Vaichinger AM, Fitzsimmons JS, O'Driscoll SW. Effect of radiocapitellar Achilles disc arthroplasty on coronoid and capitellar contact pressures after radial head excision. J Shoulder Elbow Surg 2018; 27:1785-1791. [PMID: 30007821 DOI: 10.1016/j.jse.2018.05.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 05/09/2018] [Accepted: 05/13/2018] [Indexed: 02/01/2023]
Abstract
BACKGROUND Long-term radiographic arthritis has been commonly reported after radial head excision. Concern over radial head arthroplasty may arise in certain situations including capitellar arthritis, radiocapitellar malalignment, and in young and active patients. We hypothesized that radial head excision increases coronoid contact pressures, which may at least be partially reduced by radiocapitellar Achilles tendon disc arthroplasty. METHODS Coronoid and capitellar contact pressure was measured on 6 human cadaveric elbows on a custom-designed gravity-valgus simulator under passive flexion from 0° to 90°. Sequential testing, starting with the intact specimen, resection of the radial head, and finally, radiocapitellar Achilles tendon disc arthroplasty were performed on each specimen. RESULTS Mean contact pressure of the coronoid significantly increased after radial head excision (P < .0001) and significantly improved after Achilles disc arthroplasty (P < .0001). The pressure difference was most pronounced on the lateral coronoid. From 15° to 85° of elbow flexion, mean contact pressures on the lateral coronoid were 291 kPa and 476 kPa before and after radial head excision, respectively (P < .0001). Achilles disc arthroplasty significantly lowered coronoid contact pressures to 385 kPa (P = .002); however, they remained significantly higher than those in the intact radial head group (P = .0009). CONCLUSIONS Radial head resection increases contact pressure in the coronoid, especially the lateral coronoid. This study showed that radiocapitellar Achilles disc arthroplasty significantly improves contact pressures on the coronoid after radial head resection. Achilles disc arthroplasty could be considered in patients who are not candidates for radial head arthroplasty.
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Affiliation(s)
- Taghi Ramazanian
- Biomechanics Laboratory, Department of Orthopedics, Mayo Clinic, Rochester, MN, USA
| | | | - Min Yao Chuang
- Department of Orthopedics, MacKay Memorial Hospital, Taipei, Taiwan
| | - Anthony M Vaichinger
- Biomechanics Laboratory, Department of Orthopedics, Mayo Clinic, Rochester, MN, USA
| | - James S Fitzsimmons
- Biomechanics Laboratory, Department of Orthopedics, Mayo Clinic, Rochester, MN, USA
| | - Shawn W O'Driscoll
- Biomechanics Laboratory, Department of Orthopedics, Mayo Clinic, Rochester, MN, USA.
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Laumonerie P, Tibbo ME, Reina N, Pham TT, Bonnevialle N, Mansat P. Radial head arthroplasty: a historical perspective. INTERNATIONAL ORTHOPAEDICS 2018; 43:1643-1651. [DOI: 10.1007/s00264-018-4082-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 07/31/2018] [Indexed: 12/20/2022]
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Hwang JT, Shields MN, Berglund LJ, Hooke AW, Fitzsimmons JS, O’Driscoll SW. The role of the posterior bundle of the medial collateral ligament in posteromedial rotatory instability of the elbow. Bone Joint J 2018; 100-B:1060-1065. [DOI: 10.1302/0301-620x.100b8.bjj-2017-0652.r2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Aims The aim of this study was to evaluate two hypotheses. First, that disruption of posterior bundle of the medial collateral ligament (PMCL) has to occur for the elbow to subluxate in cases of posteromedial rotatory instability (PMRI) and second, that ulnohumeral contact pressures increase after disruption of the PMCL. Materials and Methods Six human cadaveric elbows were prepared on a custom-designed apparatus which allowed muscle loading and passive elbow motion under gravitational varus. Joint contact pressures were measured sequentially in the intact elbow (INTACT), followed by an anteromedial subtype two coronoid fracture (COR), a lateral collateral ligament (LCL) tear (COR + LCL), and a PMCL tear (COR + LCL + PMCL). Results There was no subluxation or joint incongruity in the INTACT, COR, and COR + LCL specimens. All specimens in the COR + LCL + PMCL group subluxated under gravity-varus loads. The mean articular contact pressure of the COR + LCL group was significantly higher than those in the INTACT and the COR groups. The mean articular contact pressure of the COR + LCL + PMCL group was significantly higher than that of the INTACT group, but not higher than that of the COR + LCL group. Conclusion In the presence of an anteromedial fracture and disruption of the LCL, the posterior bundle of the MCL has to be disrupted for gross subluxation of the elbow to occur. However, elevated joint contact pressures are seen after an anteromedial fracture and LCL disruption even in the absence of such subluxation. Cite this article: Bone Joint J 2018;100-B:1060–5.
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Affiliation(s)
- J-T. Hwang
- Hallym University Medical College, Chuncheon, South
Korea and Department of Orthopedics, Biomechanics
Laboratory, Mayo Clinic Rochester, Minnesota, USA
| | - M. N. Shields
- Department of Orthopedics, Biomechanics
Laboratory, Mayo Clinic, Rochester, Minnesota, USA
| | - L. J. Berglund
- Department of Orthopedics, Biomechanics
Laboratory, Mayo Clinic, Rochester, Minnesota, USA
| | - A. W. Hooke
- Department of Orthopedics, Biomechanics
Laboratory, Mayo Clinic, Rochester, Minnesota, USA
| | - J. S. Fitzsimmons
- Department of Orthopedics, Biomechanics
Laboratory, Mayo Clinic, Rochester, Minnesota, USA
| | - S. W. O’Driscoll
- Department of Orthopedics, Biomechanics
Laboratory, Mayo Clinic, Rochester, Minnesota, USA
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Bellato E, Fitzsimmons JS, Kim Y, Bachman DR, Berglund LJ, Hooke AW, O'Driscoll SW. Articular Contact Area and Pressure in Posteromedial Rotatory Instability of the Elbow. J Bone Joint Surg Am 2018; 100:e34. [PMID: 29557868 DOI: 10.2106/jbjs.16.01321] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Joint incongruity in posteromedial rotatory instability (PMRI) has been theorized to determine early articular degenerative changes. Our hypothesis was that the articular contact area and contact pressure differ significantly between an intact elbow and an elbow affected by PMRI. METHODS Seven cadaveric elbows were tested under gravity varus stress using a custom-made machine designed to simulate muscle loads and allow passive elbow flexion (0° to 90°). The mean contact area and contact pressure data were collected and processed using the Tekscan sensor and software. After testing the intact specimen (intact elbow), a PMRI injury was simulated (PMRI elbow) and the specimen was tested again. RESULTS The PMRI elbows were characterized by initial joint subluxation and significantly elevated articular contact pressure. Both worsened, corresponding with a reduction in contact area, as the elbow was flexed from 0° until the joint subluxation and incongruity spontaneously reduced (at a mean [and standard error] of 60° ± 5° of flexion), at which point the mean contact pressure decreased from 870 ± 50 kPa (pre-reduction) to 440 ± 40 kPa (post-reduction) (p < 0.001) and the mean contact area increased from 80 ± 8 mm to 150 ± 58 mm (p < 0.001). This reduction of the subluxation was also followed by a shift of the contact area from the coronoid fracture edge toward the lower portion of the coronoid. At the flexion angle at which the PMRI elbows reduced, both the contact area and the contact pressure of the intact elbows differed significantly from those of the PMRI elbows, both before and after the elbow reduction (p < 0.001). CONCLUSIONS The reduction in contact area and increased contact pressures due to joint subluxation and incongruity could explain the progressive arthritis seen in some elbows affected by PMRI. CLINICAL RELEVANCE This biomechanical study suggests that the early degenerative changes associated with PMRI reported in the literature could be subsequent to joint incongruity and an increase in contact pressure between the coronoid fracture surface and the trochlea.
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Affiliation(s)
- Enrico Bellato
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota.,Department of Orthopedics and Traumatology, University of Turin Medical School, Turin, Italy
| | | | - Youngbok Kim
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota.,Department of Orthopedic Surgery, Haeundae Paik Hospital, Inje University, Busan, South Korea
| | - Daniel R Bachman
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota
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Hwang JT, Kim Y, Bachman DR, Shields MN, Berglund LJ, Fitzsimmons AT, Fitzsimmons JS, O'Driscoll SW. Axial load transmission through the elbow during forearm rotation. J Shoulder Elbow Surg 2018; 27:530-537. [PMID: 29290603 DOI: 10.1016/j.jse.2017.10.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 10/09/2017] [Accepted: 10/18/2017] [Indexed: 02/01/2023]
Abstract
BACKGROUND Forearm rotation is closely associated with the axiorotational force transmission through the elbow joint. A technique has been developed to study the transmission of force across the radiocapitellar and ulnotrochlear joints during forearm rotation. METHODS Ten human cadaveric upper limbs were prepared on a custom-designed apparatus that permits the application of extrinsic axial loads across an intact cadaveric elbow joint. A force-sensitive transducer was inserted into the elbow joint of each cadaver. A 160 N axial force was applied to the specimen during cyclic forearm rotation while the force, contact pressure, and contact area through the elbow joint were measured. RESULTS The mean force across the radiocapitellar joint showed no significant difference between pronation and supination (P = .3547). The radiocapitellar joint showed significantly higher contact area (P = .0001) and lower contact pressure (P = .0001) in pronation than in supination. The mean values for contact pressure, area, and force across the ulnotrochlear joint were not significantly different between supination and pronation. CONCLUSION The contact pressure and contact area of the radiocapitellar joint in the cadaveric model changed according to forearm rotation while the force remained constant. The mean contact pressure of the radiocapitellar joint in pronation was significantly lower than that in supination because the force across it did not change significantly and its contact area decreased significantly. These findings may suggest that the pronated elbow can play an important role in protecting the radiocapitellar joint in high-impact activities like delivering punch in martial arts or falling on an outstretched arm.
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Affiliation(s)
- Jung-Taek Hwang
- Department of Orthopedics, Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA; Department of Orthopedic Surgery, Chuncheon Sacred Heart Hospital, Hallym University Medical College, Chuncheon, Republic of Korea
| | - Youngbok Kim
- Department of Orthopedics, Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA
| | - Daniel R Bachman
- Department of Orthopedics, Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA
| | - Maegan N Shields
- Department of Orthopedics, Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA
| | - Lawrence J Berglund
- Department of Orthopedics, Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA
| | | | - James S Fitzsimmons
- Department of Orthopedics, Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA
| | - Shawn W O'Driscoll
- Department of Orthopedics, Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA.
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Lalone EA, Deluce SR, Shannon H, King GJW, Johnson JA. Design of Anatomical Population-Based and Patient-Specific Radial Head Implants. J Hand Surg Am 2017; 42:924.e1-924.e11. [PMID: 28733099 DOI: 10.1016/j.jhsa.2017.05.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 05/12/2017] [Accepted: 05/24/2017] [Indexed: 02/02/2023]
Abstract
PURPOSE The objective of this study was to characterize the morphology of the radial head and design population-based anatomical and patient-specific radial head implants. METHODS Computed tomography (CT) images of 50 normal cadaveric upper extremities (34 male, 16 female) were obtained using a 64-slice CT scanner. Surface models were ellipse-fitted and characterized. Using an intersurface distance mapping approach, the surface geometry of the population-based anatomical design (PB-An), 3 distinct patient-specific designs, and an existing axisymmetrical implant (Com-Axi) were compared with the native radial head and the overall surface mismatch was measured. RESULTS Morphological analysis indicated that the diameters of the outer and rim ellipses were correlated. The mean mismatch for the existing commercially available axisymmetrical implants was 0.5 ± 0.1 mm.The PB-An implants showed significantly reduced surface mismatch (0.4 ± 0.2 mm). The PS-An implant using 82 parameters in its design (0.1 ± 0.0 mm), had the lowest mean surface mismatch of any of the implants investigated. CONCLUSIONS The mean surface mismatch of radial head implants may be reduced using reverse engineering techniques to determine the required parameters for both population-based and patient-specific implant designs. Whether there is a significant clinical advantage of a more anatomically shaped radial head implant requires additional study. More anatomical implant shapes rely on a surgical technique to accurately position these implants during surgery. It is unclear if this can be achieved clinically using conventional techniques or whether computer-assisted surgery will be required to realize the potential advantages of a more anatomical implant. CLINICAL RELEVANCE This study characterized the morphology of the radial head with implications for population-based anatomical implants and patient-specific implants. The overall design of each implant was quantitatively compared with the native radial head. This study has implications for the design of patient-specific/anatomical implants and compares their use with commercially available generic implants.
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Affiliation(s)
- Emily A Lalone
- Biomedical Engineering Graduate Program, Western University, London, Ontario, Canada
| | - Simon R Deluce
- Biomedical Engineering Graduate Program, Western University, London, Ontario, Canada; Roth/McFarlane Hand and Upper Limb Center, St. Joseph's Health Care, London, Ontario, Canada
| | - Hannah Shannon
- Biomedical Engineering Graduate Program, Western University, London, Ontario, Canada; Roth/McFarlane Hand and Upper Limb Center, St. Joseph's Health Care, London, Ontario, Canada
| | - Graham J W King
- Roth/McFarlane Hand and Upper Limb Center, St. Joseph's Health Care, London, Ontario, Canada
| | - James A Johnson
- Biomedical Engineering Graduate Program, Western University, London, Ontario, Canada; Roth/McFarlane Hand and Upper Limb Center, St. Joseph's Health Care, London, Ontario, Canada.
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Bellato E, Kim Y, Fitzsimmons JS, Berglund LJ, Hooke AW, Bachman DR, O'Driscoll SW. Coronoid reconstruction using osteochondral grafts: a biomechanical study. J Shoulder Elbow Surg 2017; 26:1794-1802. [PMID: 28734719 DOI: 10.1016/j.jse.2017.05.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 05/08/2017] [Accepted: 05/12/2017] [Indexed: 02/01/2023]
Abstract
HYPOTHESIS The purposes of this study were to test the hypothesis that coronoid deficiency in the setting of posteromedial rotatory instability (PMRI) must be reconstructed to restore articular contact pressures to normal and to compare 3 different osteochondral grafts for this purpose. METHODS After creation of a anteromedial fracture, six cadaveric elbows were tested under gravity varus stress using a custom-made machine designed to simulate muscle loads and to passively flex the elbow. Mean articular surface contact pressure data were collected and processed using TekScan sensors and software. After testing of the intact specimen (intact condition), a PMRI injury was created (PMRI condition). Testing was repeated after reconstruction of the lateral collateral ligament (LCL) (LCL-only condition), followed by reconstruction of the coronoid with 3 different osteochondral graft techniques (reconstructed conditions). RESULTS Contact pressure was consistently significantly higher in the PMRI elbow compared with the intact, LCL-only, and reconstructed conditions (P < .006). The LCL-only elbow contact pressure was significantly higher than that of the intact and reconstructed conditions from 5° to 55° of flexion (P = .018). The contact pressure of the intact elbow was never significantly different from that of the reconstructed elbow, except at 5° of flexion (P ≤ .008). No significant difference was detected between each of the reconstructed techniques (P ≥ .15). However, the annular surface of the radial head was the only graft that yielded contact pressures not significantly different from normal at any flexion angle. CONCLUSION Isolated reconstruction of the LCL did not restore native articular surface contact pressure, and reconstruction of the coronoid using osteochondral graft was necessary. There was no difference in contact pressures among the 3 coronoid reconstruction techniques.
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Affiliation(s)
- Enrico Bellato
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Department of Orthopedics and Traumatology, University of Turin Medical School, Turin, Italy
| | - Youngbok Kim
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Department of Orthopedic Surgery, Haeundae Paik Hospital, Inje University, Busan, Republic of Korea
| | | | | | | | - Daniel R Bachman
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
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Bellato E, Kim Y, Fitzsimmons JS, Hooke AW, Berglund LJ, Bachman DR, O'Driscoll SW. Role of the lateral collateral ligament in posteromedial rotatory instability of the elbow. J Shoulder Elbow Surg 2017; 26:1636-1643. [PMID: 28689821 DOI: 10.1016/j.jse.2017.04.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 04/07/2017] [Accepted: 04/16/2017] [Indexed: 02/01/2023]
Abstract
BACKGROUND Posteromedial rotatory instability (PMRI) of the elbow consists of an anteromedial coronoid fracture with lateral collateral ligament (LCL) and posterior bundle of the medial collateral ligament (PMCL) tears. We hypothesized that the LCL tear is required for elbow subluxation/joint incongruity and that an elbow affected by an anteromedial subtype 2 coronoid fracture and a PMCL tear exhibits contact pressures different from both an intact elbow and an elbow affected by PMRI. MATERIALS AND METHODS Six cadaveric elbows were tested under gravity varus stress using a custom-made machine designed to simulate muscle loads and to passively flex the elbow from 0° to 90° and measure joint contact pressures. After testing of the intact specimen (INTACT-elbow), an anteromedial subtype 2 coronoid fracture with a PMCL tear (COR+PMCL-elbow) and a PMRI injury (PMRI-elbow), after adding an LCL tear, were tested. The highest values of mean contact pressure were used for the comparison among the 3 groups. RESULTS Neither subluxation nor joint incongruity was observed in the COR+PMCL-elbow. The addition of an LCL detachment consistently caused subluxation and joint incongruity. Mean contact pressures were higher in the COR+PMCL-elbow compared with the INTACT-elbow (P < .03) but lower than in the PMRI-elbow (P < .001). CONCLUSIONS The LCL lesion in PMRI is necessary for elbow subluxation and causes marked elevations in contact pressures. Even without subluxation, the COR+PMCL-elbow showed higher contact pressures compared with the INTACT-elbow. Treatment of PMRI should be directed toward prevention of joint incongruity, whether by surgical or nonsurgical means, to prevent high articular contact pressures.
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Affiliation(s)
- Enrico Bellato
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Department of Orthopedics and Traumatology, University of Turin Medical School, Turin, Italy
| | - Youngbok Kim
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Department of Orthopedic Surgery, Haeundae Paik Hospital, Inje University, Busan, Republic of Korea
| | | | | | | | - Daniel R Bachman
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
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Adikrishna A, Shin YH, Zulkarnain RF, Hong H, Sun Y, Jeon IH. Beveled posteromedial corner of the radial head: a three-dimensional micro-computed tomography modeling study. J Anat 2017; 231:690-697. [PMID: 28815587 DOI: 10.1111/joa.12672] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/13/2017] [Indexed: 01/04/2023] Open
Abstract
The posteromedial quadrant of the radial head is known to be different from the other quadrants. However, the explanation of this unique anatomical feature remains elusive. Hence, this study was designed to address this unique anatomical variance using three-dimensional μCT (micro-computed tomography) analysis. Nine fresh cadaveric radial heads were scanned using μCT. Three-dimensional subchondral bone and cartilage models were rendered. Both models were separated into the four quadrants at both the periphery (rim) and the articulating dish (fovea): anteromedial (AM), posteromedial (PM), posterolateral (PL), and anterolateral (AL). Each quadrant was analyzed in terms of (1) subchondral bone porosity (SBP), (2) mean subchondral bone thickness (MSBT), and (3) mean cartilage thickness (MCT). There was a significant difference between the fovea and the rim in terms of its microarchitectural features. Although within the fovea, the PM quadrant did not differ significantly from the other quadrants, a significant difference was found within the rim. In terms of SBP, PM, AM, PL and AL were calculated as 33, 37, 36 and 35%, respectively. In terms of MSBT, PM, AM, PL and AL were calculated as 0.11, 0.10, 0.09, and 0.09 mm, respectively. In terms of MCT, PM, AM, PL and AL were calculated 1.09, 0.81, 0.84 and 0.83 mm, respectively. The PM corner of the radial head between the 8 and 9 o'clock positions, was beveled. This might explain why the PM quadrant of the rim differed significantly from the other quadrants in terms of its microarchitectural features.
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Affiliation(s)
- Arnold Adikrishna
- Department of Orthopedic Surgery, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - Young-Ho Shin
- Department of Orthopedic Surgery, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - Rizki F Zulkarnain
- Department of Orthopedic Surgery, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - Hanpyo Hong
- Department of Orthopedic Surgery, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - Yucheng Sun
- Department of Orthopedic Surgery, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - In-Ho Jeon
- Department of Orthopedic Surgery, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
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Radial shortening osteotomy reduces radiocapitellar contact pressures while preserving valgus stability of the elbow. Knee Surg Sports Traumatol Arthrosc 2017; 25:2280-2288. [PMID: 28238092 DOI: 10.1007/s00167-017-4468-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Accepted: 02/06/2017] [Indexed: 10/20/2022]
Abstract
PURPOSE Shortening osteotomy of the proximal radius might represent a potential salvage procedure in symptomatic radiocapitellar osteoarthritis, which could decrease radiocapitellar load while preserving the native radial head. In an in-vitro biomechanical investigation, we sought to determine whether shortening osteotomy of the proximal radius (1) decreases the radiocapitellar joint pressure upon axial loading and (2) retains valgus stability of the elbow. In addition, the anatomic configuration of the lesser sigmoid notch was evaluated to assess possible contraindications. METHODS Axial loading (0-400 N) and valgus torque (7.5 N m) over the full range of motion were applied to 14 fresh-frozen specimens before and after shortening osteotomy of the proximal radius by 2.5 mm. Radiocapitellar and ulnohumeral load distribution during axial compression was evaluated using a digital pressure mapping sensor. Valgus displacement was analyzed with a 3D camera system. The inclination angle (α) of the lesser sigmoid notch was assessed via 50 CT scans. RESULTS Up to axial loading of 250 N, shortening osteotomy caused a significant decrease in radiocapitellar contact pressures (p < 0.041). Valgus stability of specimens did not differ before and after shortening osteotomy (n.s.). The mean inclination angle (α) of the lesser sigmoid notch was 11.3° ± 6.3°. 46% had an inclination angle of ≤ 10° (type I). 46% had an inclination angle of 11°-20° (type II). In 8%, the inclination angle was >20° (type III). CONCLUSION Shortening osteotomy of the proximal radius can decrease radiocapitellar contact pressures during axial loading of up to 250 N. Primary valgus stability is not relevantly influenced by this procedure. In few patients, shortening osteotomy may cause radioulnar impingement of the radial head at the distal edge of the lesser sigmoid notch due to an inclination angle of >20°. Shortening osteotomy might be a promising treatment option to decrease pain levels in case of isolated radiocapitellar osteoarthritis.
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Abstract
Distal humeral replacement and the total elbow are two commonly-used arthroplasties Each prosthesis has evolving indications and surgical techniques Recent changes in device design and implantation methods are due to biomechanical and clinical outcome-based research New prostheses and methods provide: better elbow kinematics, more durable bearings and longer-lasting joint replacement potential
Cite this article: EFORT Open Rev 2017;2:83-88. DOI: 10.1302/2058-5241.2.160064
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Affiliation(s)
| | - Akin Cil
- University of Missouri-Kansas City, Kansas City, USA
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Bellato E, O'Driscoll SW. Prosthetic replacement for coronoid deficiency: report of three cases. J Shoulder Elbow Surg 2017; 26:382-388. [PMID: 28089259 DOI: 10.1016/j.jse.2016.09.039] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 09/21/2016] [Accepted: 09/27/2016] [Indexed: 02/01/2023]
Abstract
BACKGROUND Persistent elbow instability associated with coronoid deficiency is a difficult condition to treat. Several surgical techniques have been described for coronoid reconstruction, but the resulting outcomes have been unpredictable. We hypothesized that a coronoid prosthesis could restore elbow stability. METHODS A nonanatomically shaped metallic coronoid prosthesis was custom designed for each of 3 patients. Each had a chronic fracture-subluxation with persistent instability, deficiencies of the coronoid, and compromise of the radial head. Each patient had undergone 2 to 4 prior failed operations. RESULTS At a mean follow-up of 11 years (range, 10-12), 2 of the 3 patients were completely pain free; the third had a visual analog scale pain score not greater than 3/10. All 3 maintained a stable joint, although a functional range of motion was not able to be maintained in any. Two patients rated themselves "improved" and 1 patient rated himself "almost normal" on the Summary Outcome Determination scale. All radiographic follow-up showed the coronoid prosthesis in proper position without loosening. CONCLUSION Prosthetic replacement of the coronoid appears successful in restoring stability in chronically unstable elbows with coronoid deficiency.
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Affiliation(s)
- Enrico Bellato
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Department of Orthopedics and Traumatology, University of Turin Medical School, Turin, Italy
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Sahu D, Fitzsimmons JS, Thoreson AR, An KN, O'Driscoll SW. Radiocapitellar contact characteristics during prosthetic radial head subluxation. J Shoulder Elbow Surg 2017; 26:170-177. [PMID: 27727059 DOI: 10.1016/j.jse.2016.07.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 06/15/2016] [Accepted: 07/01/2016] [Indexed: 02/01/2023]
Abstract
BACKGROUND Metallic radial head prostheses are often used in the management of comminuted radial head fractures and elbow instability. We hypothesized that during radiocapitellar subluxation, the contact pressure characteristics of an anatomic radial head prosthesis will more closely mimic those of the native radial head compared with a monopolar circular or a bipolar circular radial head design. MATERIALS AND METHODS With use of 6 fresh frozen cadaver elbows, mean radiocapitellar contact pressures, contact areas, and peak pressures of the native radial head were assessed at 0, 2, 4, and 6 mm of posterior subluxation. These assessments were repeated after the native radial head was replaced with anatomic, monopolar circular and bipolar circular prostheses. RESULTS The joint contact pressures increased with the native and the prosthetic radial head subluxation. The mean contact pressures for the native radial head and anatomic prosthesis increased progressively and significantly from 0 to 6 mm of subluxation (native, 0.6 ± 0.0 MPa to 1.9 ± 0.2 MPa; anatomic, 0.7 ± 0.0 MPa to 2.1 ± 0.3 MPa; P < .0001). The contact pressures with the monopolar and bipolar prostheses were significantly higher at baseline and did not change significantly further with subluxation (monopolar, 2.0 ± 0.1 MPa to 2.2 ± 0.2 MPa [P = .31]; bipolar, 1.7 ± 0.1 MPa to 1.9 ± 0.1 MPa [P = .12]). The pattern of increase in contact pressures with the anatomic prosthesis mimicked that of the native radial head. Conversely, the circular prostheses started out with higher contact pressures that stayed elevated. CONCLUSION The articular surface design of a radial head prosthesis is an important determinant of joint contact pressures.
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Affiliation(s)
- Dipit Sahu
- Department of Orthopaedics, Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA
| | - James S Fitzsimmons
- Department of Orthopaedics, Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA
| | - Andrew R Thoreson
- Department of Orthopaedics, Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA
| | - Kai-Nan An
- Department of Orthopaedics, Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA
| | - Shawn W O'Driscoll
- Department of Orthopaedics, Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA.
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Bigazzi P, Biondi M, Ceruso M. Radiocapitellar prosthetic arthroplasty in traumatic and post-traumatic complex lesions of the elbow. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY AND TRAUMATOLOGY 2016; 26:851-858. [PMID: 27544680 DOI: 10.1007/s00590-016-1837-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 08/11/2016] [Indexed: 10/21/2022]
Abstract
Radiocapitellar prosthetic arthroplasty is a fascinating new option in the treatment of complex lesions of the elbow. The device has been developed in order to treat primitive and post-traumatic radiocapitellar degenerative arthritis, while preserving the ulnohumeral joint of the elbow. Compared to a radial head resection, it avoids valgus and axial instability of the elbow and forearm preventing ulnohumeral degeneration. Seven patients have been reviewed with a mean of follow-up of 40 months. Two of them presented with an acute trauma and five of them with a post-traumatic degenerative arthritis involving the radial compartment of the elbow. The patients' evaluation was performed using DASH and Mayo elbow performance score (MEPS). Implant overstuffing, loosening and degenerative changes of the ulnohumeral joint have been monitored with X-ray controls. All patients presented with a marked improvement in elbow function, no signs of overstuffing or ulnohumeral degeneration were observed. Two patients developed a clinically asymptomatic aseptic loosening of the radial press-fit stem. The radiocapitellar prosthetic arthroplasty shows convincing results in the treatment of symptomatic radiocapitellar degenerative arthritis. It has also been effective in acute trauma scenarios in the presence of major osteoarticular wearing or loss of the entire radiocapitellar joint.
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Affiliation(s)
- Prospero Bigazzi
- Hand Surgery and Reconstructive Microsurgery Unit, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy.
| | - Marco Biondi
- Orthopaedic Clinic, University of Florence, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
| | - Massimo Ceruso
- Hand Surgery and Reconstructive Microsurgery Unit, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy
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Jennings JD, Hahn A, Rehman S, Haydel C. Management of Adult Elbow Fracture Dislocations. Orthop Clin North Am 2016; 47:97-113. [PMID: 26614925 DOI: 10.1016/j.ocl.2015.08.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Elbow fracture dislocations are complicated injuries that are difficult to manage and fraught with complications. A complete series of radiographs is typically complemented with CT scan to evaluate the elbow and assist preoperative planning. Typically, operative intervention is necessary and a systematic approach to the elbow injuries should be chosen. This article addresses the coronoid and proceeds to the radial head, lateral soft tissues, and finally the medial ligaments if elbow instability persists. With a focused, systematic surgical approach, improved outcomes have been demonstrated and patients may recover full function and range of motion in the affected elbow.
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Affiliation(s)
- John D Jennings
- Department of Orthopedic Surgery and Sports Medicine, Temple University Hospital, 3501 North Broad Street, Philadelphia, PA 19140, USA.
| | - Alexander Hahn
- Department of Orthopedic Surgery and Sports Medicine, Temple University School of Medicine, 3501 N. Broad St, Philadelphia, PA 19102, USA
| | - Saqib Rehman
- Department of Orthopedic Surgery and Sports Medicine, Temple University Hospital, 3501 North Broad Street, Philadelphia, PA 19140, USA
| | - Christopher Haydel
- Department of Orthopedic Surgery and Sports Medicine, Temple University Hospital, 3501 North Broad Street, Philadelphia, PA 19140, USA
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O'Driscoll SW, Bachman DR. Letter regarding "Radiocapitellar joint contact pressures following radial head arthroplasty". J Hand Surg Am 2015; 40:863-4. [PMID: 25813933 DOI: 10.1016/j.jhsa.2014.12.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Accepted: 12/10/2014] [Indexed: 02/02/2023]
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