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Deichsel A, Leibrandt L, Raschke MJ, Klimek M, Oeckenpöhler S, Herbst E, Kittl C, Glasbrenner J. Biomechanical Stability of Third-Generation Adjustable Suture Loop Devices Versus Continuous Loop Button Device for Cortical Fixation of ACL Tendon Grafts. Orthop J Sports Med 2024; 12:23259671241240375. [PMID: 38576875 PMCID: PMC10993678 DOI: 10.1177/23259671241240375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 09/03/2023] [Indexed: 04/06/2024] Open
Abstract
Background Concerns regarding the primary stability of early adjustable loop button (ALB) devices for cortical fixation of tendon grafts in anterior cruciate ligament reconstruction (ACLR) have led to the development of new implant designs. Purpose To evaluate biomechanical stability of recent ALB implants in comparison with a continuous loop button (CLB) device. Study Design Controlled laboratory study. Methods ACLR was performed in a porcine model (n = 40) using 2-strand porcine flexor tendons with a diameter of 8 mm. Three ALB devices (Infinity Button [ALB1 group]; Tightrope II RT [ALB2 group]; A-TACK [ALB3 group]) and 1 CLB device (FlippTack with polyethylene suture) were used for cortical tendon graft fixation. Cyclic loading (1000 cycles up to 250 N) with complete unloading were applied to the free end of the tendon graft using a uniaxial testing machine, followed by load to failure. Elongation, stiffness, yield load, and ultimate failure load were recorded and compared between the groups using a Kruskal-Wallis test with post hoc Dunn correction. Results Elongation after 1000 cycles at 250 N was similar between groups (ALB1, 4.5 ± 0.7 mm; ALB2, 4.8 ± 0.8 mm; ALB3, 4.5 ± 0.6 mm; CLB, 4.5 ± 0.8 mm), as was load to failure (ALB1, 838 ± 109 N; ALB2, 930 ± 89 N; ALB3, 809 ± 103 N; CLB, 842 ± 80 N). Stiffness was significantly higher in the ALB1 group compared with the CLB group (262.3 ± 21.6 vs 229.3 ± 15.1 N/mm; P < .05). No significant difference was found between the 4 groups regarding yield load. Constructs failed either by rupture of the loop, breakage of the button, or rupture of the tendon. Conclusion The tested third-generation ALB devices for cortical fixation in ACLR withstood cyclic loading with complete unloading without significant differences to a CLB device. Clinical Relevance The third-generation ALB devices tested in the present study provided biomechanical stability comparable with that of a CLB device. Furthermore, ultimate failure loads of all tested implants exceeded the loads expected to occur in the postoperative period after ACLR.
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Affiliation(s)
- Adrian Deichsel
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Münster, Münster, Germany
| | - Lara Leibrandt
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Münster, Münster, Germany
| | - Michael J. Raschke
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Münster, Münster, Germany
| | - Matthias Klimek
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Münster, Münster, Germany
| | - Simon Oeckenpöhler
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Münster, Münster, Germany
| | - Elmar Herbst
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Münster, Münster, Germany
| | - Christoph Kittl
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Münster, Münster, Germany
| | - Johannes Glasbrenner
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Münster, Münster, Germany
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Li X, Cao W, Zhou H, Ji R, Xiao J, Zhao C. The healing effect of the all inside technique is superior to the traditional technique in the reconstruction of the anterior cruciate ligament. Eur J Transl Myol 2024; 34:11970. [PMID: 38351844 PMCID: PMC11017173 DOI: 10.4081/ejtm.2024.11970] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Accepted: 10/24/2023] [Indexed: 03/28/2024] Open
Abstract
Our main objective was to examine the curative effect of all inside technique and traditional technique in anterior cruciate ligament (ACL) reconstruction. In our retrospective study at the First People's Hospital of Jiashan County, we analyzed 88 participants with ACL injuries (50 males, 38 females, average age 27 years). They were randomly divided into two groups: traditional ACL reconstruction (42 participants) and all inside ACL reconstruction (46 participants). We measured and recorded the Visual Analog Scores (VAS), International Knee Documentation Committee (IKDC), Lysholm scores, operation time, graft diameter and length between the traditional technique group and all inside technique group. There were statistically significant differences in the Lysholm scores and IKDC scores between traditional and all inside technique groups. The all inside technique showed a higher efficacy and effective post-operative recovery with minimal pain and recurrent injuries. Our findings showed that the differences in gender, age, side of injury and operation time were not significant (p> 0.05). Follow-up was conducted at 6 months and 12 months post operations (mean, 7.5 ± 1.1 months). All inside technique minimizing tissue disruption, optimizing graft placement and facilitating early recovery have a significant impact on patient outcomes.
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Affiliation(s)
- Xiong Li
- Department of Orthopedics, Jiashan County First People's Hospital, Jiaxing, Zhejiang.
| | - Wu Cao
- Department of Orthopedics, Jiashan County First People's Hospital, Jiaxing, Zhejiang.
| | - Hongyu Zhou
- Department of Orthopedics, Jiashan County First People's Hospital, Jiaxing, Zhejiang.
| | - Ruida Ji
- Department of Orthopedics, Jiashan County First People's Hospital, Jiaxing, Zhejiang.
| | - Jian Xiao
- Department of Orthopedics, Jiashan County First People's Hospital, Jiaxing, Zhejiang.
| | - Chen Zhao
- Department of Orthopedics, Center for Rehabilitation Medicine, Zhejiang Provincial People's Hospital(Affiliated People's Hospital, Hangzhou Medical College), Hangzhou, Zhejiang.
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Wallace GJ, Thompson JD, Diekfuss JA, Champagne AA, Myer GD, Kaiser J, Lamplot JD. Suture Augmentation of a Four-Strand Semitendinosus Graft Improves Time-Zero Biomechanical Properties. Arthroscopy 2024; 40:124-132. [PMID: 37355190 DOI: 10.1016/j.arthro.2023.06.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 04/05/2023] [Accepted: 06/12/2023] [Indexed: 06/26/2023]
Abstract
PURPOSE To compare the time-zero biomechanical properties of hamstring graft preparations with or without suture augmentation for anterior cruciate ligament reconstruction (ACLR) in a full-construct cadaveric model. METHODS Hamstring grafts were harvested from 24 fresh frozen human cadavers and prepared in 1 of 3 ways: quadrupled SemiTendinosus (SemiT), and quadrupled SemiT with suture augmentation (SemiT+2.0-mm tape or SemiT+1.3-mm tape; n = 8 per group). Adjustable loop suspensory implants and cortical buttons were used for fixation on a porcine tibia and acrylic block. Testing included force-controlled cyclic loading at 250 N and 400 N followed by load to failure. RESULTS The 2 suture augmentation groups had less total elongation and increased stiffness compared to the nonsuture-augmented group (P = .025). The SemiT+2.0-mm tape group had 36% less total elongation and 34% increased stiffness compared to SemiT+1.3mm tape (P < .001). CONCLUSIONS Suture augmentation improves construct biomechanics at time zero following hamstring tendon ACLR. Augmentation with 2.0-mm tape suture improves construct biomechanics compared to 1.3-mm tape suture. CLINICAL RELEVANCE Independent suture augmentation of a quadrupled SemiT graft improves ACLR construct biomechanics. Outcomes were improved with augmentation using 2.0-mm tape suture compared to 1.3-mm tape suture.
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Affiliation(s)
- Garrett J Wallace
- Department of Orthopaedics, Emory University School of Medicine, Atlanta, Georgia, USA
| | - J Daniel Thompson
- Department of Orthopaedics, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Jed A Diekfuss
- Department of Orthopaedics, Emory University School of Medicine, Atlanta, Georgia, USA; Emory Sports Performance and Research Center (SPARC), Flowery Branch, Georgia, U.S.A
| | - Allen A Champagne
- Department of Orthopedic Surgery, Queen's University, Kingston, Ontario, Canada; School of Medicine, Queen's University, Kingston, Ontario, Canada
| | - Gregory D Myer
- Department of Orthopaedics, Emory University School of Medicine, Atlanta, Georgia, USA; Emory Sports Performance and Research Center (SPARC), Flowery Branch, Georgia, U.S.A.; Emory Sports Medicine Center, Atlanta, Georgia, U.S.A.; The Micheli Center for Sports Injury Prevention, Waltham, Massachusetts, U.S.A
| | - Jarred Kaiser
- Department of Orthopaedics, Emory University School of Medicine, Atlanta, Georgia, USA
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Coppola C, Krost S, Runer A, Raas C, Glodny B, Mayr R. PEEK Interference Screws Show Significant Tunnel Enlargement After ACL Reconstruction and is Comparable to Adjustable-Length Loop Cortical Button Fixation. Indian J Orthop 2024; 58:40-47. [PMID: 38161404 PMCID: PMC10754774 DOI: 10.1007/s43465-023-01029-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 10/19/2023] [Indexed: 01/03/2024]
Abstract
Background It is unclear whether the use of polyetheretherketone (PEEK) interference screws for anterior cruciate ligament (ACL) reconstruction leads to postoperative tunnel enlargement. Femoral tunnel enlargement was further compared with adjustable-length loop cortical fixation. Methods Eighteen patients with ACL reconstruction using hamstring grafts were retrospectively divided into two groups. Eleven patients were treated with the ACL reconstruction technique using a PEEK interference screw for femoral graft fixation. Seven patients received adjustable-length loop cortical buttons for femoral fixation. Tibial ACL graft fixation was performed using PEEK interference screws. Tunnel volume changes were assessed using computed tomography (CT) scans performed after surgery (100%) and after 1 year. The maximal tunnel diameter was measured. Results The group with femoral screw fixation showed a mean tunnel volume change of 108.15 ± 13.7% on the tibial side and 124.07 ± 25.38% on the femoral side. The group with femoral button fixation showed a tunnel volume change of 111.12 ± 12.72% on the tibial side and 130.96 ± 21.71% on the femoral side. The differences in femoral tunnel volume changes were not significant (P = 0.562). Femoral tunnels with PEEK screw fixation showed significantly larger diameter after 12 months in comparison with button fixation (13.02 ± 1.43 mm vs. 10.46 ± 1.29 mm, P < 0.001). Conclusions PEEK interference screws were associated with significant tibial and femoral tunnel enlargement. Femoral tunnel enlargement was comparable between PEEK interference screws and button fixation. Final femoral tunnel diameter was significantly larger with PEEK screw fixation in comparison to button fixation.
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Affiliation(s)
- Christian Coppola
- Department of Orthopaedics and Trauma Surgery, Medical University Innsbruck, Innsbruck, Austria
| | - Sandra Krost
- Department of Orthopaedics and Trauma Surgery, Medical University Innsbruck, Innsbruck, Austria
| | - Armin Runer
- Department of Orthopaedics and Trauma Surgery, Medical University Innsbruck, Innsbruck, Austria
| | - Christoph Raas
- Department of Orthopaedics and Trauma Surgery, Medical University Innsbruck, Innsbruck, Austria
| | - Bernhard Glodny
- Department of Radiology, Medical University Innsbruck, Innsbruck, Austria
| | - Raul Mayr
- Department of Orthopaedics and Trauma Surgery, Medical University Innsbruck, Innsbruck, Austria
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Runer A, Hax J, Gelber P, Stadelmann VA, Preiss S, Salzmann G. Triple Hybrid Tibial Anterior Cruciate Ligament Graft Fixation. Arthrosc Tech 2023; 12:e2375-e2379. [PMID: 38196858 PMCID: PMC10773257 DOI: 10.1016/j.eats.2023.08.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 08/13/2023] [Indexed: 01/11/2024] Open
Abstract
Optimal graft fixation in anterior cruciate ligament reconstruction is critical. Several direct and indirect methods of graft fixation exist, each with advantages and disadvantages. This Technical Note describes a tibial hybrid anterior cruciate ligament graft fixation technique combining direct and indirect fixation methods, including autologous bone augmentation of the drill tunnel using cancellous bone fragments.
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Affiliation(s)
- Armin Runer
- Department of Sports Orthopaedics, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Jakob Hax
- Departments of Hip and Knee Surgery, Schulthess Klinik, Zürich, Switzerland
| | - Pablo Gelber
- Department of Orthopaedic Surgery, Hospital de la Santa Creu i Sant Pau, Universitat Autonoma de Barcelona, Barcelona, Spain
| | | | - Stefan Preiss
- Departments of Hip and Knee Surgery, Schulthess Klinik, Zürich, Switzerland
| | - Gian Salzmann
- Departments of Hip and Knee Surgery, Schulthess Klinik, Zürich, Switzerland
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Eichinger M, Ploner M, Degenhart G, Rudisch A, Smekal V, Attal R, Mayr R. Tunnel widening after ACL reconstruction with different fixation techniques: aperture fixation with biodegradable interference screws versus all-inside technique with suspensory cortical buttons. 5-year data from a prospective randomized trial. Arch Orthop Trauma Surg 2023; 143:6707-6718. [PMID: 37542556 PMCID: PMC10541822 DOI: 10.1007/s00402-023-05001-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 07/18/2023] [Indexed: 08/07/2023]
Abstract
BACKGROUND The aim of the present study was to examine tunnel widening and clinical outcomes after anterior cruciate ligament reconstruction (ACLR) using two different fixation methods: aperture fixation with biodegradable interference screws versus all-inside ACLR with suspensory cortical buttons. METHODS Tunnel widening was assessed using volumetric and diameter measurements on magnetic resonance imaging (MRI) scans directly after surgery, as well as 6 months and 2 and 5 years postoperatively. Clinical outcomes were assessed after 5 years with instrumented tibial anteroposterior translation measurement (KT-1000), single-leg hop testing, and the IKDC, Lysholm, and Tegner activity scores. RESULTS At the final follow-up, the study population consisted of 21 patients, 12 of whom underwent screw fixation and 9 of whom had button fixation. 3 patients with all-inside ACLR had sustained early repeat ruptures within 6 months after surgery and had to be excluded from the further analysis. With screw fixation, the tibial tunnel volume changed significantly more over time compared to all-inside button fixation, with a larger initial increase at 6 months (from postoperative 2.9 ± 0.2 to 3.3 ± 0.2 cm3 at 6 months versus 1.7 ± 0.1 to 1.9 ± 0.2 cm3) and a greater final decrease over 2-5 years postoperatively (from 3.1 ± 0.2 to 1.9 ± 0.2 cm3 versus 1.8 ± 0.2 ± 0.1 to 1.3 ± 0.1 cm3) (P < 0.001). The femoral tunnel volume remained comparable between the two groups throughout the follow-up period, with an initial 1.6 ± 0.1 cm3 in both groups and 1.2 ± 0.1 vs. 1.3 ± 0.1 after 5 years in the screw and button groups, respectively (P ≥ 0.314). The maximum tibial and femoral tunnel diameters were significantly larger with screw fixation at all four time points. Tibial diameters measured 11.1 ± 0.2, 12.3 ± 0.3, 12.3 ± 0.4, and 11.2 ± 0.4 mm in the screw group versus 8.1 ± 0.3, 8.9 ± 0.3, 9.1 ± 0.4 and 8.2 ± 0.5 mm in the button group (P < 0.001). Femoral diameters measured 8.6 ± 0.2, 10.5 ± 0.4, 10.2 ± 0.3, and 8.9 ± 0.3 versus 7.3 ± 0.3, 8.4 ± 0.4, 8.4 ± 0.3, 7.5 ± 0.3, respectively (P ≤ 0.007). Four patients (33%) in the screw group exceeded a diameter of 12 mm on the tibial side after 5 years versus none in the button group (not significant, P = 0.104). Tibial anteroposterior translation measurement with KT-1000 after 5 years was 2.3 ± 2.4 mm in the screw group versus 3.2 ± 3.5 mm in the button group (not significant, P = 0.602). There were no significant differences between the groups in any of the other clinical outcomes. CONCLUSION Tibial tunnels in ACLR with screw fixation were associated with a larger increase in tunnel volume within the first 2 years and a greater decrease up to 5 years after surgery, while femoral tunnel volumes did not differ significantly. On the tibial side, the need for staged revision ACLR may be greater after biodegradable interference screw fixation if repeat ruptures occur, especially within the first 2 years after primary ACLR. Concerns may remain regarding a higher graft failure rate with all-inside ACLR. LEVEL OF EVIDENCE II. RCT CONSORT NCT01755819.
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Affiliation(s)
- Martin Eichinger
- Department of Orthopedics and Traumatology, a.ö. Bezirkskrankenhaus St. Johann in Tirol, Tirol, Austria
| | - Martin Ploner
- Department of Orthopedics and Traumatology, Medical University of Innsbruck, Anichstrasse 35, 6020, Innsbruck, Austria
| | - Gerald Degenhart
- Department of Orthopedics and Traumatology, Medical University of Innsbruck, Anichstrasse 35, 6020, Innsbruck, Austria
| | - Ansgar Rudisch
- Department of Radiology, Medical University of Innsbruck, Innsbruck, Austria
| | | | - René Attal
- Department of Orthopedics and Traumatology, Feldkirch Academic Hospital, Feldkirch, Austria
| | - Raul Mayr
- Department of Orthopedics and Traumatology, Medical University of Innsbruck, Anichstrasse 35, 6020, Innsbruck, Austria.
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Lifka S, Rehberger Y, Pastl K, Rofner-Moretti A, Reichkendler M, Baumgartner W. The Development and Biomechanical Analysis of an Allograft Interference Screw for Anterior Cruciate Ligament Reconstruction. Bioengineering (Basel) 2023; 10:1174. [PMID: 37892904 PMCID: PMC10604633 DOI: 10.3390/bioengineering10101174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 10/06/2023] [Indexed: 10/29/2023] Open
Abstract
Graft fixation during cruciate ligament reconstruction using interference screws is a common and frequently used surgical technique. These interference screws are usually made of metal or bioabsorbable materials. This paper describes the development of an allograft interference screw from cortical human bone. During the design of the screw, particular attention was paid to the choice of the screw drive and the screw shape, as well as the thread shape. Based on these parameters, a prototype was designed and manufactured. Subsequently, the first biomechanical tests using a bovine model were performed. The test procedure comprised a torsion test to determine the ultimate failure torque of the screw and the insertion torque during graft fixation, as well as a pull-out test to asses the ultimate failure load of the graft fixation. The results of the biomechanical analysis showed that the mean value of the ultimate failure torque was 2633 Nmm, whereas the mean occurring insertion torque during graft fixation was only 1125 Nmm. The mean ultimate failure load of the graft fixation was approximately 235 N. The results of this work show a good overall performance of the allograft screw compared to conventional screws, and should serve as a starting point for further detailed investigations and studies.
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Affiliation(s)
- Sebastian Lifka
- Institute of Biomedical Mechatronics, Johannes Kepler University Linz, 4040 Linz, Austria
| | | | | | | | - Markus Reichkendler
- Department of Orthopedic and Trauma Surgery, District Hospital Schwaz, 6130 Schwaz, Austria
| | - Werner Baumgartner
- Institute of Biomedical Mechatronics, Johannes Kepler University Linz, 4040 Linz, Austria
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McMellen CJ, Sinkler MA, Calcei JG, Hobson TE, Karns MR, Voos JE. Management of Bone Loss and Tunnel Widening in Revision ACL Reconstruction. J Bone Joint Surg Am 2023; 105:1458-1471. [PMID: 37506198 DOI: 10.2106/jbjs.22.01321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
➤ Both mechanical and biological factors can contribute to bone loss and tunnel widening following primary anterior cruciate ligament (ACL) reconstruction.➤ Revision ACL surgery success is dependent on graft position, fixation, and biological incorporation.➤ Both 1-stage and 2-stage revision ACL reconstructions can be successful in correctly indicated patients.➤ Potential future solutions may involve the incorporation of biological agents to enhance revision ACL surgery, including the use of bone marrow aspirate concentrate, platelet-rich plasma, and bone morphogenetic protein-2.
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Affiliation(s)
- Christopher J McMellen
- Department of Orthopaedic Surgery, University Hospitals Cleveland Medical Center, Cleveland, Ohio
| | - Margaret A Sinkler
- Department of Orthopaedic Surgery, University Hospitals Cleveland Medical Center, Cleveland, Ohio
| | - Jacob G Calcei
- Department of Orthopaedic Surgery, University Hospitals Cleveland Medical Center, Cleveland, Ohio
- University Hospitals Drusinsky Sports Medicine Institute, Cleveland, Ohio
| | - Taylor E Hobson
- Department of Orthopaedic Surgery, University Hospitals Cleveland Medical Center, Cleveland, Ohio
- University Hospitals Drusinsky Sports Medicine Institute, Cleveland, Ohio
| | - Michael R Karns
- Department of Orthopaedic Surgery, University Hospitals Cleveland Medical Center, Cleveland, Ohio
- University Hospitals Drusinsky Sports Medicine Institute, Cleveland, Ohio
| | - James E Voos
- Department of Orthopaedic Surgery, University Hospitals Cleveland Medical Center, Cleveland, Ohio
- University Hospitals Drusinsky Sports Medicine Institute, Cleveland, Ohio
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An BJ, Wang YT, Zhao Z, Wang MX, Xing GY. Comparative study of the clinical efficacy of all-inside and traditional techniques in anterior cruciate ligament reconstruction. World J Clin Cases 2023; 11:3195-3203. [PMID: 37274047 PMCID: PMC10237140 DOI: 10.12998/wjcc.v11.i14.3195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 03/05/2023] [Accepted: 04/04/2023] [Indexed: 05/16/2023] Open
Abstract
BACKGROUND Many studies have focused on the femoral tunnel technique and fixation method, but few studies have involved the tibial tunnel technique and fixation method. The all-inside technique is one of the new techniques that has been described in recent years. All-inside anterior cruciate ligament (ACL) reconstruction is based on a tibial socket instead of a full tunnel. This method has many potential advantages.
AIM To compare clinical outcomes of knee ACL autograft reconstruction using all-inside quadrupled semitendinosus (AIST) and traditional hamstring tendon (TBT) techniques.
METHODS From January 2017 to October 2019, the clinical data of 80 patients with ACL reconstruction were retrospectively analyzed, including 67 males and 13 females. The patients had an average age of 24.3 ± 3.1 years (age range: 18-33 years). The AIST technique was used in 42 patients and the TBT technique was used in 38 patients. The time between operation and injury, operative duration, postoperative visual analogue scale (VAS) score and knee functional recovery were recorded and compared between the two groups. The International Knee Documentation Committee (IKDC) and Lysholm scoring system were used to comprehensively evaluate clinical efficacy.
RESULTS Eighty patients were followed for 24-36 mo, with an average follow-up duration of 27.5 ± 1.8 mo. There were no significant differences in the time between surgery and injury, operative duration, IKDC and Lysholm scores of the affected knee at the last follow-up evaluation between the two groups. There were significant differences in VAS scores 1 d, 3 d, 7 d, 2 wk and 1 mo after surgery (P < 0.05). There was no significant difference in VAS score at 3 mo, 6 mo and 1 year after operation.
CONCLUSION The efficacy of the AIST ACL reconstruction technique was comparable to the TBT technique, but the postoperative pain was less with the AIST technique. Thus, the AIST technique is an ideal treatment choice for ACL reconstruction.
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Affiliation(s)
- Bai-Jing An
- Department of Sports Medicine, The Fourth Medical Center of PLA General Hospital, Beijing 100000, China
| | - Yao-Ting Wang
- Department of Sports Medicine, The Fourth Medical Center of PLA General Hospital, Beijing 100000, China
| | - Zhe Zhao
- Department of Sports Medicine, The Fourth Medical Center of PLA General Hospital, Beijing 100000, China
| | - Ming-Xin Wang
- Department of Sports Medicine, The Fourth Medical Center of PLA General Hospital, Beijing 100000, China
| | - Geng-Yan Xing
- Department of Sports Medicine, The Fourth Medical Center of PLA General Hospital, Beijing 100000, China
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10
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Jernick M, Borden PS, Seager A, McGarry MH, Adamson GJ, Lee TQ. Biomechanical Evaluation of TensionLoc Versus the Double Spike Plate for ACL Graft Tibial Fixation. Orthop J Sports Med 2023; 11:23259671231169198. [PMID: 37255944 PMCID: PMC10226316 DOI: 10.1177/23259671231169198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 02/22/2023] [Indexed: 06/01/2023] Open
Abstract
Background The optimal tibial fixation of anterior cruciate ligament (ACL) reconstruction (ACLR) grafts remains controversial. Purpose/Hypothesis The purpose of this study was to compare the biomechanical characteristics of the TensionLoc (TL) cortical fixation device with the Double Spike Plate (DSP) fixation device for ACL tibial fixation using both bone-patellar tendon-bone (BTB) and quadriceps grafts. It was hypothesized that there would be no differences in biomechanical characteristics between the fixation devices regardless of graft type. Study Design Controlled laboratory study. Methods ACLR was performed on 14 matched-pair cadaveric knee specimens-7 pairs using quadriceps grafts (n = 3 male cadaveric knee specimens; n = 4 female cadaveric knee specimens; age, 51 ± 8 years) and 7 pairs using BTB grafts (n = 3 male cadaveric knee specimens; n = 4 female cadaveric knee specimens; age, 50 ± 7 years). One side of each pair was randomized to receive DSP fixation, and the contralateral side received TL fixation. Specimens underwent cyclic ramp loading (10 cycles each at 50-100 N, 50-250 N, and 50-400 N), followed by load-to-failure testing, with the tensile force in line with the tibial tunnel. Results between the 2 fixation types were compared with a paired t test. Results For the quadriceps graft, there were no significant differences in cyclic loading or load-to-failure characteristics between fixation types (P≥ .092 for all parameters). For the BTB graft, TL fixation resulted in higher stiffness than DSP at all cyclic testing cycles except for cycle 1 during 100-N loading and had lower displacement at 250-N loading (3.4 ± 0.1 vs 5.4 ± 0.3 mm; P = .045). For load to failure, TL fixation resulted in higher stiffness than DSP fixation (232 ± 3.1 vs 188.4 ± 6.4 N/mm; P = .046); however, all other load-to-failure parameters were not statistically different (P≥ .135 for all parameters). Conclusion With the quadriceps tendon graft, there were no significant differences in biomechanical characteristics between TL and DSP ACL tibial fixations; however, with BTB grafts, the TL tibial fixation demonstrated greater biomechanical integrity than the DSP tibial fixation. Clinical Relevance The TL fixation device may provide an alternative ACL tibial fixation option for BTB and soft tissue grafts.
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Affiliation(s)
- Michael Jernick
- Orthopaedic Biomechanics Laboratory,
Congress Medical Foundation, Pasadena, California, USA
| | | | - Andorra Seager
- Sports and Spine Orthopaedics,
Torrance, California, USA
| | - Michelle H. McGarry
- Orthopaedic Biomechanics Laboratory,
Congress Medical Foundation, Pasadena, California, USA
| | - Gregory J. Adamson
- Orthopaedic Biomechanics Laboratory,
Congress Medical Foundation, Pasadena, California, USA
| | - Thay Q. Lee
- Orthopaedic Biomechanics Laboratory,
Congress Medical Foundation, Pasadena, California, USA
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11
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Graf RM, Dart SE, MacLean IS, Barras LA, Moran TE, Werner BC, Gwathmey FW, Diduch DR, Miller MD. The "N+10 Rule" to Avoid Graft-Tunnel Mismatch in Bone-Patellar Tendon-Bone ACL Reconstruction Using Independent Femoral Tunnel Drilling. Orthop J Sports Med 2023; 11:23259671231168885. [PMID: 37250745 PMCID: PMC10214051 DOI: 10.1177/23259671231168885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 01/30/2023] [Indexed: 05/31/2023] Open
Abstract
Background Graft-tunnel mismatch (GTM) is a common problem in anterior cruciate ligament (ACL) reconstruction (ACLR) using bone-patellar tendon-bone (BPTB) grafts. Hypothesis Application of the "N+10 rule" in endoscopic ACLR with BPTB grafts will result in acceptable tibial tunnel length (TTL), minimizing GTM. Study Design Controlled laboratory study. Methods Endoscopic BPTB ACLR was conducted on the paired knees of 10 cadaveric specimens using 2 independent femoral tunnel drilling techniques-accessory anteromedial portal and flexible reamer. The graft bone blocks were trimmed to 10 × 20 mm, and the intertendinous distance (represented by "N") between the bone blocks was measured. The N+10 rule was used to set the angle of the ACL tibial tunnel guide to the appropriate number of degrees for drilling. The amount of excursion or recession of the tibial bone plug in relation to the anterior tibial cortical aperture was measured in both flexion and extension. A GTM threshold of ±7.5 mm was set based on prior studies. Results The mean BPTB ACL intertendinous distance was 47.5 ± 5.5 mm. The mean measured intra-articular distance was 27.2 ± 3 mm. Using the N+10 rule, the mean total (flexion plus extension) GTM was 4.3 ± 3.2 mm (GTM in flexion, 4.9 ± 3.6 mm; GTM in extension, 3.8 ± 3.5 mm). In 18 of 20 (90%) cadaveric knees, the mean total GTM fell within the ±7.5-mm threshold. When comparing the actual measured TTL to the calculated TTL, there was a mean difference of 5.4 ± 3.9 mm. When comparing femoral tunnel drilling techniques, the total GTM for the accessory anteromedial portal technique was 2.1 ± 3.7 mm, while the total GTM for the flexible reamer technique was 3.6 ± 5.4 mm (P = .5). Conclusion The N+10 rule resulted in an acceptable mean GTM in both flexion and extension. The mean difference between the measured versus calculated TTL using the N+10 rule was also acceptable. Clinical Relevance The N+10 rule is a simple and effective intraoperative strategy for achieving desired TTL regardless of patient-specific factors to avoid excessive GTM in endoscopic BPTB ACLR using independent femoral tunnel drilling.
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Affiliation(s)
- Ryan M. Graf
- University of Virginia Health System,
Charlottesville, Virginia, USA
| | - Scott E. Dart
- University of Virginia Health System,
Charlottesville, Virginia, USA
| | - Ian S. MacLean
- University of Virginia Health System,
Charlottesville, Virginia, USA
| | - Laurel A. Barras
- University of Virginia Health System,
Charlottesville, Virginia, USA
| | - Thomas E. Moran
- University of Virginia Health System,
Charlottesville, Virginia, USA
| | - Brian C. Werner
- University of Virginia Health System,
Charlottesville, Virginia, USA
| | | | - David R. Diduch
- University of Virginia Health System,
Charlottesville, Virginia, USA
| | - Mark D. Miller
- University of Virginia Health System,
Charlottesville, Virginia, USA
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12
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Runer A, Keeling L, Wagala N, Nugraha H, Özbek EA, Hughes JD, Musahl V. Current trends in graft choice for anterior cruciate ligament reconstruction - part I: anatomy, biomechanics, graft incorporation and fixation. J Exp Orthop 2023; 10:37. [PMID: 37005974 PMCID: PMC10067784 DOI: 10.1186/s40634-023-00600-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 03/22/2023] [Indexed: 04/04/2023] Open
Abstract
Graft selection in anterior cruciate ligament (ACL) reconstruction is critical, as it remains one of the most easily adjustable factors affecting graft rupture and reoperation rates. Commonly used autografts, including hamstring tendon, quadriceps tendon and bone-patellar-tendon-bone, are reported to be biomechanically equivalent or superior compared to the native ACL. Despite this, such grafts are unable to perfectly replicate the complex anatomical and histological characteristics of the native ACL. While there remains inconclusive evidence as to the superiority of one autograft in terms of graft incorporation and maturity, allografts appear to demonstrate slower incorporation and maturity compared to autografts. Graft fixation also affects graft properties and subsequent outcomes, with each technique having unique advantages and disadvantages that should be carefully considered during graft selection.
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Affiliation(s)
- Armin Runer
- Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh, Pittsburgh, PA, USA.
- Department for Sports Orthopaedics, Klinikum Rechts der Isar, Technical University of Munich, Munich, Germany.
| | - Laura Keeling
- Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Nyaluma Wagala
- Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Hans Nugraha
- Department of Orthopaedic and Traumatology, Faculty of Medicine, University of Udayana, / Prof. Dr. I.G.N.G. Ngoerah General Hospital, Denpasar, Bali, Indonesia
| | - Emre Anil Özbek
- Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Orthopedics and Traumatology, Ankara University, Ankara, Turkey
| | - Jonathan D Hughes
- Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Volker Musahl
- Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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13
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Peez C, Greßmann M, Raschke MJ, Glasbrenner J, Briese T, Frank A, Herbst E, Kittl C. The Bone Bridge for Tibial ACL Graft Fixation: A Biomechanical Analysis of Different Tibial Fixation Methods for ACL Reconstruction. Orthop J Sports Med 2023; 11:23259671221143478. [PMID: 36636032 PMCID: PMC9830095 DOI: 10.1177/23259671221143478] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 09/13/2022] [Indexed: 01/09/2023] Open
Abstract
Background The tibial fixation site is considered the weak link in anterior cruciate ligament (ACL) reconstruction, and conflicting results regarding the biomechanical properties of various fixation methods have been reported. Purpose To examine knots tied over a bone bridge and its biomechanical properties as a suitable tibial fixation method in ACL reconstruction. Study Design Controlled laboratory study. Methods We divided 40 fresh-frozen porcine tibiae into 4 equal groups to evaluate flexor tendon grafts set with standard tibial fixation techniques: (1) bone bridge (BB group), (2) suspension button (SB group), (3) combined interference screw and bone bridge (IFS/BB group), and (4) combined interference screw and suspension button (IFS/SB group). Each construct was subjected to cyclic loading (1500 cycles, 50-250 N, 1 Hz) with a servohydraulic materials testing machine to measure elongation; load-to-failure testing (displacement rate: 25 mm/s) was then performed. Load to failure, stiffness, and yield load were compared between constructs using 1-way analysis of variance. Results The hybrid fixation constructs (IFS/BB and IFS/SB groups) showed significantly better biomechanical properties than the isolated extracortical fixation constructs (BB and SB groups) (P < .05 for all). There were no differences between the isolated extracortical fixation constructs or between the hybrid fixation constructs in elongation or load to failure; however, stiffness of the IFS/BB group was significantly higher than that of the IFS/SB group (175.3 ± 16.6 vs 144.9 ± 20.1 N/mm, respectively; P < .05). Stiffness between the SB and BB groups was not significantly different. Conclusion Hybrid fixation had superior biomechanical performance compared with isolated extracortical fixation. However, tibial graft fixation using a bone bridge either as isolated extracortical fixation or combined with an interference screw for hybrid fixation showed equivalent biomechanical properties compared with suspension button-based graft fixation. Clinical Relevance The clinical use of a bone bridge for tibial graft fixation could reduce the cost for ACL reconstruction and lower the rate of implant-associated issues.
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Affiliation(s)
- Christian Peez
- Department of Trauma, Hand and Reconstructive Surgery, University
Hospital Münster, Münster, Germany
| | - Marvin Greßmann
- Department of Trauma, Hand and Reconstructive Surgery, University
Hospital Münster, Münster, Germany
| | - Michael J. Raschke
- Department of Trauma, Hand and Reconstructive Surgery, University
Hospital Münster, Münster, Germany
| | - Johannes Glasbrenner
- Department of Trauma, Hand and Reconstructive Surgery, University
Hospital Münster, Münster, Germany
| | - Thorben Briese
- Department of Trauma, Hand and Reconstructive Surgery, University
Hospital Münster, Münster, Germany
| | - Andre Frank
- Department of Trauma, Hand and Reconstructive Surgery, University
Hospital Münster, Münster, Germany
| | - Elmar Herbst
- Department of Trauma, Hand and Reconstructive Surgery, University
Hospital Münster, Münster, Germany
| | - Christoph Kittl
- Department of Trauma, Hand and Reconstructive Surgery, University
Hospital Münster, Münster, Germany.,Christoph Kittl, MD, Department of Trauma, Hand and
Reconstructive Surgery, University Hospital Münster, Albert-Schweitzer-Campus 1,
Building W1, 48149 Münster, Germany (
)
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14
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Rovere G, Stramazzo L, Romeo M, D’Arienzo A, Maccauro G, Camarda L. Hamstring Graft Preparation for ACL Reconstruction. Orthop Rev (Pavia) 2022; 14:38408. [PMID: 36540071 PMCID: PMC9760727 DOI: 10.52965/001c.38408] [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] [Indexed: 12/23/2022] Open
Abstract
Anterior cruciate ligament (ACL) reconstruction represents one of the most common procedures in orthopedic surgery. It usually involves the harvest of both gracilis and semitendinosus tendons from the ipsilateral knee. Different methods of hamstring graft preparation have been proposed in recent years, to create an adequate graft diameter reducing morbidity linked to gracilis tendon harvesting procedure. More recently, the use of only 1 of the tendons (semitendinosus) in a tripled or quadrupled arrangement has been described, especially in an all-inside type of reconstruction. Having a thicker tendon with a quadrupled semitendinosus (ST), instead of double gracilis and ST enables to have a graft with enough diameter to resemble more closely the native ACL and decreases the risk of graft re-rupture. The present study aims to describe different options of hamstring graft preparing, listing and analyzing each configuration to help surgeons to choose the most suitable graft type for their patients.
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Affiliation(s)
- Giuseppe Rovere
- Department of Orthopedics and Traumatology Fondazione Policlinico Universitario A. Gemelli IRCSS, Roma, Italia; Università Cattolica Del Sacro Cuore, Roma, Italia., ROMA, Italia
| | - Leonardo Stramazzo
- Department of Orthopaedic Surgery (DICHIRONS), Università degli Studi di Palermo
| | - Michele Romeo
- Department of Orthopaedic Surgery (DICHIRONS), Università degli Studi di Palermo
| | | | - Giulio Maccauro
- Department of Orthopedics and Traumatology Fondazione Policlinico Universitario A. Gemelli IRCSS, Roma, Italia; Università Cattolica Del Sacro Cuore, Roma, Italia., ROMA, Italia
| | - Lawrence Camarda
- Department of Orthopaedic Surgery (DICHIRONS), Università degli Studi di Palermo
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15
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Lai PJ, Wong CC, Chang WP, Liaw CK, Chen CH, Weng PW. Comparison of two different types of hybrid Tibial fixations for anterior cruciate ligament reconstruction: a prospective comparative cohort study. BMC Musculoskelet Disord 2022; 23:1096. [PMCID: PMC9749364 DOI: 10.1186/s12891-022-06057-3] [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: 03/18/2022] [Accepted: 12/05/2022] [Indexed: 12/16/2022] Open
Abstract
Background Previous studies have compared different kinds of fixations for anterior cruciate ligament reconstruction. Nevertheless, there is no optimal method to date. To the best of authors’ knowledge, there is no article discussing the combination of adjustable suspensory device and interference screw for hybrid tibial fixation. Methods In total, 66 patients (n = 34, adjustable suspensory device and interference screw; n = 32, cortical screw and interference screw) were analyzed. Their International Knee Documentation Committee score and Tegner activity level scale were evaluated before and after a 2-year follow-up. The Single Assessment Numeric Evaluation score was evaluated after a 2-year follow-up. Physical exams such as range of motion, anterior knee pain (VAS > = 3) and Lachman test were assessed before and at least 12 months after surgery. To evaluate tunnel widening, anteroposterior and lateral view radiography was conducted 1 day and at least 12 months after surgery. A more than 10% change was considered tibial tunnel widening. Mann–Whitney U test, independent t test, paired t test, Fisher’s exact test and chi-squared test were used to compare the variables. Linear and logistic regression models were applied to adjust for potential confounders. Results No variable except gender (P = 0.006) showed significant difference with regard to demographic data. After adjustment, there was no statistically significant difference between the groups regarding post-operative physical exams. Patients who used adjustable suspensory device and interference screw had lower post-operative Single Assessment Numeric Evaluation score (adjusted β − 8.194; P = 0.017), Tegner activity level scale (adjusted β − 1.295; P = 0.001) and pre-operative degrees of knee flexion (adjusted β − 2.825; P = 0.026). Less percentage of tunnel widening in the lateral view of radiographs was seen in patients in group of adjustable suspensory device and interference screw (adjusted β − 1.733; P = 0.038). No significant difference was observed in the anteroposterior view of radiographs (adjusted β − 0.667; P = 0.26). Conclusion In these 66 patients, we observed less tibial tunnel widening and lower post-operative functional scores in the group of adjustable suspensory device and interference screw. Both groups displayed similar outcomes of physical exams as well as improvement after operation. The proposed method may become an alternative option. Nonetheless, the quality of our study is still limited, and thus further studies are warranted to determine the efficacy and further application. Trial registration Joint Institutional Review Board of Taipei Medical University, Taipei, Taiwan (No: N201805094). Study design Prospective comparative cohort study; Level of evidence, II.
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Affiliation(s)
- Po-Jen Lai
- grid.412896.00000 0000 9337 0481Department of Orthopaedics, Shuang Ho Hospital, Taipei Medical University, New Taipei City, 235 Taiwan
| | - Chin-Chean Wong
- grid.412896.00000 0000 9337 0481Department of Orthopaedics, Shuang Ho Hospital, Taipei Medical University, New Taipei City, 235 Taiwan ,grid.412896.00000 0000 9337 0481Department of Orthopaedics, School of Medicine, College of Medicine, Taipei Medical University, Taipei City, 110 Taiwan ,grid.412896.00000 0000 9337 0481Graduate Institute of Biomedical Materials and Tissue Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei City, 110 Taiwan ,grid.412896.00000 0000 9337 0481Research Center of Biomedical Devices, Taipei Medical University, Taipei, 11031 Taiwan ,grid.412896.00000 0000 9337 0481International Ph.D. Program for Cell Therapy and Regenerative Medicine, College of Medicine, Taipei Medical University, Taipei, 11031 Taiwan ,Non-Invasive Cancer Therapy Research Institute of Taiwan, Taipei, 10489 Taiwan
| | - Wen-Pei Chang
- grid.412896.00000 0000 9337 0481Department of Nursing, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan ,grid.412896.00000 0000 9337 0481School of Nursing, College of Nursing, Taipei Medical University, Taipei, Taiwan
| | - Chen-Kun Liaw
- grid.412896.00000 0000 9337 0481Department of Orthopaedics, Shuang Ho Hospital, Taipei Medical University, New Taipei City, 235 Taiwan ,grid.412896.00000 0000 9337 0481Department of Orthopaedics, School of Medicine, College of Medicine, Taipei Medical University, Taipei City, 110 Taiwan ,grid.412896.00000 0000 9337 0481Graduate Institute of Biomedical Materials and Tissue Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei City, 110 Taiwan
| | - Chih-Hwa Chen
- grid.412896.00000 0000 9337 0481Department of Orthopaedics, Shuang Ho Hospital, Taipei Medical University, New Taipei City, 235 Taiwan ,grid.412896.00000 0000 9337 0481Department of Orthopaedics, School of Medicine, College of Medicine, Taipei Medical University, Taipei City, 110 Taiwan ,grid.412896.00000 0000 9337 0481Graduate Institute of Biomedical Materials and Tissue Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei City, 110 Taiwan
| | - Pei-Wei Weng
- grid.412896.00000 0000 9337 0481Department of Orthopaedics, Shuang Ho Hospital, Taipei Medical University, New Taipei City, 235 Taiwan ,grid.412896.00000 0000 9337 0481Department of Orthopaedics, School of Medicine, College of Medicine, Taipei Medical University, Taipei City, 110 Taiwan ,grid.412896.00000 0000 9337 0481Research Center of Biomedical Devices, Taipei Medical University, Taipei, 11031 Taiwan ,International Ph.D. Program in Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, 11031 Taiwan
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16
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Zhou Y, Li L, Chen R, Gong M. Double-bundle versus single-bundle anterior cruciate ligament reconstruction in preventing the progression of osteoarthritis: A protocol for systematic review and meta-analysis of randomized controlled trials. Medicine (Baltimore) 2022; 101:e31101. [PMID: 36626441 PMCID: PMC9750529 DOI: 10.1097/md.0000000000031101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND The knee has a high incidence of osteoarthritis (OA) following the anterior cruciate ligament (ACL) injury, which was reduced by ACL reconstruction including double-bundle (DB) techniques and single-bundle (SB) techniques. However, the effectiveness of preventing the progression of OA after the ACL reconstruction using DB and SB techniques is controversial. METHODS This meta-analysis was performed following the preferred reporting items for systematic reviews and meta-analyses guidelines. The databases, including PubMed, Embase, and Cochrane Library, were searched. Randomized controlled trials comparing DB with SB ACL reconstruction and reporting clinical outcomes of radiological OA were included. Quality of the included studies was assessed using the Cochrane Collaboration's risk of bias tool. The outcome was analyzed using the risk ratio (RR) and its corresponding 95% confidence interval (CI). RESULTS Ten Randomized controlled trials studies were included in this meta-analysis (accounting 1062 knees: 475 SB and 587 DB). The rate of radiological OA after the ACL reconstruction was 39% in SB group and 34% in DB group. The results of meta-analysis showed no difference in the occurrence of radiological OA between DB group and in SB group (RR, 1.05; 95% CI, 0.85-1.30, P = .63), including subgroup of radiological scores of OA (subgroup of Minimal OA: RR, 0.95; 95% CI, 0.61-1.48; P = .82; subgroup of Notable OA: RR, 1.16; 95% CI, 0.75-1.78; P = .51), subgroup of follow-up time in 5 years and more than 5 years (RR, 0.98; 95% CI, 0.80-1.20; P = .85), and subgroup of autograft graft for ACL (RR, 0.97; 95% CI, 0.79-1.19; P = .77). However, the DB group had less incidences of knee OA than the SB group in subgroup of less than 5 years (RR, 1.48; 95% CI, 1.13-1.92; P = .004) and subgroup of allograft type (RR, 1.42; 95% CI, 1.06-1.91; P = .02). CONCLUSION Overall, this meta-analysis showed that the DB technique was no more effective in preventing the progression of OA than the SB technique in ACL reconstruction at midterm follow-up.
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Affiliation(s)
- Yun Zhou
- People’s Hospital of Leshan, Leshan, Sichuan, China
| | - Linji Li
- Department of Anesthesiology, Nanchong Central Hospital, The Second Clinical Medical College, North Sichuan Medical College, Nanchong, China
| | - Ran Chen
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, China
| | - Min Gong
- Department of Orthopaedic Surgery, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
- * Correspondence: Min Gong, Department of Orthopaedics, the Hospital of Chengdu University of Traditional Chinese Medicine, No. 39 Shi’er Qiao Rd, Chengdu, Sichuan 610075, China (e-mail: )
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17
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de Geofroy B, Ghabi A, Jouvion AX, Limouzin J, de Landevoisin E. Return to duty in military personnel after ACL reconstruction: STG versus ST4 double adjustable-loop device. Orthop Traumatol Surg Res 2022; 108:103378. [PMID: 35907624 DOI: 10.1016/j.otsr.2022.103378] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 01/18/2022] [Accepted: 01/27/2022] [Indexed: 02/03/2023]
Abstract
INTRODUCTION ACL ligamentoplasty with a quadruple semitindosus graft (ST4) and double adjustable endobutton (ST4E) allow the preservation of the gracilis, which should allow more rapid recovery of soldiers following ACL reconstruction. However, the literature does not report any superiority of this technique over others in terms of return to duty and sport. HYPOTHESIS The ST4E system allows a return to military duty at least equivalent to the semitendinosus and gracilis graft (STG) with screw fixation. MATERIAL AND METHOD A total of 133 soldiers operated on for ACL were included, 64 by the STG technique and 69 by ST4E, with an average follow-up of 4 years. The return to duty was assessed, with recovery of skills between the first and second postoperative year, as well as the medico-administrative status at the last follow-up, muscle recovery through isokinetic tests, the sports level before/after surgery, and the failure rate. RESULTS No difference was found in the return to the soldier's previous post between the STG (64%) and the ST4E (64%) (p=0.97). No difference was found for the medico-administrative status at the last follow-up, but the short-term muscle recovery, the return to sport, and the failure rate were in favor of the ST4E group. DISCUSSION The ST4E, adjustable double endobutton system, is comparable to the STG technique in terms of return to military duty. On the other hand, it offers faster muscle recovery with better sports results and fewer patients on prolonged sick leave (PSL). This study demonstrated that two-thirds of soldiers operated on for anterior cruciate ligamentoplasty regained their initial aptitude regardless of the technique used, which influences the army's operational capacity and on disability pension requests after service. LEVEL OF EVIDENCE III, single center retrospective comparative study.
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Affiliation(s)
- Bernard de Geofroy
- Department of Orthopaedic surgery and traumatology, Military teaching hospital Laveran, 34, boulevard Laveran, 13013 Marseille, France.
| | - Ammar Ghabi
- Department of Orthopaedic surgery and traumatology, Military teaching hospital Laveran, 34, boulevard Laveran, 13013 Marseille, France
| | - Arnaud-Xavier Jouvion
- Physical Medicine and Rehabilitation Department, Military teaching hospital Laveran, 34, boulevard Laveran, 13013 Marseille, France
| | - Jacques Limouzin
- Department of Orthopaedic surgery and traumatology, Military teaching hospital Laveran, 34, boulevard Laveran, 13013 Marseille, France
| | - Emmanuel de Landevoisin
- Department of Orthopaedic surgery and traumatology, Military teaching hospital Laveran, 34, boulevard Laveran, 13013 Marseille, France; Department of Orthopaedic surgery and traumatology, Hôpital Privé Toulon Hyères-Saint-Roch, 99, avenue Saint-Roch, 83000 Toulon, France
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18
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Toofan H, Tabatabaei Irani P, Ghadimi E, Ayati Firoozabadi M, Mortazavi SMJ. Simultaneous Arthroscopic Anterior Cruciate Ligament Reconstruction Using Double Suspensory Technique and Medial Open-Wedge, High Tibial Osteotomy. Arthrosc Tech 2022; 11:e2357-e2364. [PMID: 36632396 PMCID: PMC9827118 DOI: 10.1016/j.eats.2022.08.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 08/24/2022] [Indexed: 11/19/2022] Open
Abstract
Anterior cruciate ligament reconstruction (ACLR) is generally performed regardless of knee malalignments. However, there are some indications for either staged or simultaneous ACL reconstruction and realignment procedures, such as high tibial osteotomy (HTO). Simultaneous HTO-ACL reconstruction has the apparent benefit of a single surgical procedure with a faster recovery than a staged procedure, and it produces good clinical outcomes. Several techniques have been described for simultaneous ACLR and medial open wedge HTO. The tibial tunnel preparation and graft fixation are the most challenging part of the procedure. Recent studies on comparison of fixation of tibial tunnel graft using suspensory fixation versus bioabsorbable screws have shown superior results of more bone preservation and less graft rupture. We assumed suspensory fixation on the tibial side with bone preservation might be more reliable in patients who received ACLR and open wedge HTO at the same time. Therefore, we described our technique of simultaneous open-wedge HTO and ACLR using double suspensory graft fixation.
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Affiliation(s)
- Hesam Toofan
- Joint Reconstruction Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Pouya Tabatabaei Irani
- Joint Reconstruction Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Ehsan Ghadimi
- Joint Reconstruction Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Seyed Mohammad Javad Mortazavi
- Joint Reconstruction Research Center, Tehran University of Medical Sciences, Tehran, Iran,Address correspondence to Javad Mortazavi, M.D., Joint Reconstruction Research Center, Tehran University of Medical Sciences, 1419733141, Tehran, Iran.
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19
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Alrabaa RG, Padaki AS, Kannan A, Zhang AL. Postless Tape Augmentation for Anterior Cruciate Ligament (ACL) Reconstruction. Arthrosc Tech 2022; 11:e2195-e2203. [PMID: 36632393 PMCID: PMC9827005 DOI: 10.1016/j.eats.2022.08.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 08/15/2022] [Indexed: 11/18/2022] Open
Abstract
Suture or tape augmentation for anterior cruciate ligament (ACL) reconstruction has been described as a technique to increase biomechanical strength and potentially improve clinical outcomes. However, the suture or tape used for augmentation usually requires independent tibial fixation from the ACL graft in the form of an anchor or post. This may introduce the potential for graft and augment tension mismatch, while increasing surgical cost. We present our technique for ACL reconstruction with postless tape augmentation. The ACL graft and tape are fixed at the same tension with interference fixation using a single tibial sheath and screw construct, which allows for ACL augmentation without the need for an additional post or implant.
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Affiliation(s)
| | | | | | - Alan L. Zhang
- Address correspondence to Alan L. Zhang, M.D., Department of Orthopedic Surgery, University of California- San Francisco, 1500 Owens Street, Box 3004, San Francisco, CA, 94158, U.S.A.
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20
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Benca E, van Knegsel KP, Zderic I, Caspar J, Strassl A, Hirtler L, Fuchssteiner C, Gueorguiev B, Windhager R, Widhalm H, Varga P. Biomechanical evaluation of an allograft fixation system for ACL reconstruction. Front Bioeng Biotechnol 2022; 10:1000624. [PMID: 36406221 PMCID: PMC9670106 DOI: 10.3389/fbioe.2022.1000624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022] Open
Abstract
The purpose of this study was to compare the biomechanical stability, especially graft slippage of an allograft screw and a conventional interference screw for tibial implant fixation in ACL reconstruction. Twenty-four paired human proximal tibia specimens underwent ACL reconstruction, with the graft in one specimen of each pair fixed using the allograft screw and the other using the conventional interference screw. Specimens were subjected to cyclic tensile loading until failure. The two fixation methods did not show any statistical difference in load at graft slippage (p = 0.241) or estimated mean survival until slippage onset (p = 0.061). The ultimate load and the estimated mean survival until failure were higher for the interference screw (p = 0.04, and p = 0.018, respectively). Graft displacement at ultimate load reached values of up to 7.2 (interference screw) and 11.3 mm (allograft screw). The allograft screw for implant fixation in ACL reconstruction demonstrated comparable behavior in terms of graft slippage to the interference screw but underperformed in terms of ultimate load. However, the ultimate load, occurring at progressive graft slippage, may not be considered a direct indicator of clinical failure.
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Affiliation(s)
- Emir Benca
- Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Vienna, Austria
- AO Research Institute Davos, Davos Platz, Switzerland
- *Correspondence: Emir Benca,
| | - Kenneth P. van Knegsel
- AO Research Institute Davos, Davos Platz, Switzerland
- Department of Orthopedics and Trauma Surgery, Cantonal Hospital of Lucerne, Lucerne, Switzerland
| | - Ivan Zderic
- AO Research Institute Davos, Davos Platz, Switzerland
| | - Jan Caspar
- AO Research Institute Davos, Davos Platz, Switzerland
| | - Andreas Strassl
- Department of Biomedical Imaging and Image-Guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Lena Hirtler
- Division of Anatomy, Center for Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria
| | - Christoph Fuchssteiner
- Division of Anatomy, Center for Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria
| | | | - Reinhard Windhager
- Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Vienna, Austria
| | - Harald Widhalm
- Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Vienna, Austria
| | - Peter Varga
- AO Research Institute Davos, Davos Platz, Switzerland
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Comparison of biomechanical analysis of four different tibial tunnel fixations in a bovine model. Knee 2022; 38:193-200. [PMID: 36095927 DOI: 10.1016/j.knee.2022.08.015] [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: 01/22/2022] [Revised: 06/16/2022] [Accepted: 08/24/2022] [Indexed: 02/02/2023]
Abstract
BACKGROUND To determine the ideal fixation technique for an ACL reconstruction with a hamstring graft, multiple studies have been undertaken to define the initial biomechanical properties of tibial fixation. PURPOSE The aim of this study was to compare the biomechanical properties of tibial fixation methods by creating single or hybrid systems. METHODS Bovine tibias and forefoot digital extensor tendons were prepared with four different tibial anterior cruciate ligament fixation methods and compared biomechanically. Fixation materials included polyethylene Ultrabraid high-strength sutures, Biosure interference screws (Smith and Nephew, Memphis, TN, USA), staples (Smith and Nephew, Richards Regular Fixation Staples without Spikes, Memphis, TN, USA), and knotless suture anchors (Multifix-S PEEK) (Smith and Nephew, Memphis, TN, USA). Four groups (n = 5 specimens) were established - group I: single fixation with interference screws; group II: single fixation with knotless anchors; group III: hybrid fixation with interference screws and staples; group IV: hybrid fixation with interference screws and knotless anchors. Each specimen underwent evaluations for cyclic displacement, cyclic stiffness, initial loading strength, ultimate failure load, pull-out displacement, and pull-out stiffness. RESULTS All specimens completed cyclic loading and load-to-failure. The cyclic displacement in group II, which had a single fixation, indicated significantly greater elongation compared with the other groups (P = 0.002). The hybrid systems were more rigid than the single systems in terms of cyclic stiffness, and no statistically significant difference was observed between the hybrid systems (P = 0.461). Group IV was significantly superior in terms of the ultimate failure load (P = 0.004). No statistically significant differences were noted between the groups for pull-out displacement or pull-out stiffness. CONCLUSION Single fixation with bioscrews as an in-tunnel tibia fixation method was as successful as hybrid systems. Multifix-S PEEK knotless suture anchors, which can be combined with bioscrews, can be a superior fixation alternative due to its flexibility and ultimate failure load values.
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22
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Comparison of the mechanical properties and mechanical damages to tendon tissue in three suspensory fixation techniques. Asia Pac J Sports Med Arthrosc Rehabil Technol 2022; 30:1-8. [PMID: 35949263 PMCID: PMC9343929 DOI: 10.1016/j.asmart.2022.05.003] [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: 10/07/2021] [Revised: 03/26/2022] [Accepted: 05/23/2022] [Indexed: 11/30/2022] Open
Abstract
Background Anterior cruciate ligament (ACL) injury is the most common traumatic injury to the knee joint. Suspensory fixation has become popular in ACL reconstruction because of its high primary stability, less invasiveness, and surgical convenience. There are two common types of suspensory fixation devices: those with fixed-length and those with adjustable-length loops. Owing to structural differences and differences in initial tensioning techniques, it is expected that mechanical property and damage to the tendons will vary from device to device; however, no literature has examined this so far. The main purpose of this study was to evaluate the damage caused to the tendon by three different suspensory fixation devices. An effective mechanical test was carried out as a prerequisite. Methods First, the mechanical properties of simple loop device (SLD) as fixed-length loop device, first-generation, and second-generation adjustable devices (AD1 and AD2) as adjustable-length loop devices were tested (isolated device testing). Second, each device was tested using bovine extensor tendons (specimen testing). Cyclic testing included 2000 cycles; the devices were subsequently displaced until failure, and the ultimate tensile strength was determined using isolated device testing. Six samples of 3 devices were used in each testing experiment. After specimen testing, the surface structure of the tendon was evaluated quantitatively using optical coherence tomography (OCT) and our original histological scoring system. Results During isolated device testing, SLD demonstrated the least cyclic displacement, followed by AD1 and AD2. The highest ultimate tensile strength was observed in AD2, followed by SLD and AD1. In specimen testing, the least cyclic displacement was observed in SLD, followed by AD1 and AD2. Histologically, AD1 demonstrated a significantly lower score, with damaged surface morphology, than SLD and AD2. OCT values were significantly higher, with a more disturbing tendon surface structure, in AD1 than in SLD and AD2. Conclusions The first-generation adjustable loop device exhibited greatest graft tissue damage at the suspensory site in a clinically relevant setting. The thinner adjustable loop mechanism may have elevated graft damage by frictional stresses during loop adjustment or by repetitive tensioning stresses.
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23
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Adjustable-Loop Cortical Suspensory Fixation Results in Greater Tibial Tunnel Widening Compared to Interference Screw Fixation in Primary Anterior Cruciate Ligament Reconstruction. MEDICINA (KAUNAS, LITHUANIA) 2022; 58:medicina58091193. [PMID: 36143870 PMCID: PMC9505006 DOI: 10.3390/medicina58091193] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 08/26/2022] [Accepted: 08/30/2022] [Indexed: 11/17/2022]
Abstract
Background: Although the use of adjustable-loop suspensory fixation has increased in recent years, the influence of the shortcomings of suspensory fixation, such as the bungee-cord or windshield-wiper effects, on tunnel widening remains to be clarified. Hypothesis/Purpose: The purpose of this study was to compare adjustable-loop femoral cortical suspensory fixation and interference screw fixation in terms of tunnel widening and clinical outcomes after anterior cruciate ligament reconstruction (ACLR). We hypothesized that tunnel widening in the adjustable-loop femoral cortical suspensory fixation (AL) group would be comparable to that in the interference screw fixation (IF) group. Methods: This study evaluated patients who underwent primary ACLR at our institution between March 2015 and June 2019. The femoral and tibial tunnel diameters were measured using plain radiographs in the immediate postoperative period and 2 years after ACLR. Tunnel widening and clinical outcomes (Lysholm score, 2000 International Knee Documentation Committee subjective score, and Tegner activity level) were compared between the two groups. Results: There were 48 patients (mean age, 29.8 ± 12.0 years) in the AL group and 44 patients (mean age, 26.0 ± 9.5 years) in the IF group. Tunnel widening was significantly greater in the AL group than that in the IF group at the tibia anteroposterior (AP) middle (2.03 mm vs. 1.32 mm, p = 0.017), tibia AP distal (1.52 mm vs. 0.84 mm, p = 0.012), tibia lateral proximal (1.85 mm vs. 1.00 mm, p = 0.001), tibia lateral middle (2.36 mm vs. 1.03 mm, p < 0.001), and tibia lateral distal (2.34 mm vs. 0.85 mm, p < 0.001) levels. There were no significant differences between the two groups with respect to femoral tunnel widening and clinical outcomes. Conclusions: Tibial tunnel widening was significantly greater in the AL group than in the IF group at 2 years after primary ACLR. However, the clinical outcomes in the two groups were comparable at 2 years.
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Mahirogullari M, Kehribar L, Surucu S, Kayaalp ME, Yilmaz AK, Aydin M. Comparative Results of Anterior Cruciate Ligament Reconstruction with Full Tibial Tunnel: Quadrupled Semitendinosus Suspensory Femoral and Tibial Fixation versus Quadrupled Semitendinosus and Gracilis Suspensory Femoral and Tibial Screw and Staple Fixation. J Knee Surg 2022. [PMID: 35820431 DOI: 10.1055/s-0042-1749396] [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] [Indexed: 02/07/2023]
Abstract
This study compared the clinical outcomes of patients treated with described "modified all-inside" anterior cruciate ligament reconstruction (ACLR) technique with those of patients treated with suspensory femoral fixation and a bioabsorbable tibial interference screw with the ACLR technique. From 2017 to 2019, 98 patients who underwent ACLR surgery by two surgeons using either of the techniques were included in this study. Patients in group 1 were treated with the "modified all-inside" ACLR technique. In this technique, only the semitendinosus tendon was harvested as a four-strand graft and fixed to the tibia and femur with suspensory buttons. Patients in group 2 were treated with suspensory femoral fixation and a bioabsorbable tibial interference screw ACL reconstruction technique. Patients' functional outcomes were evaluated by the Lysholm score, Tegner activity scale, and International Knee Documentation Committee (IKDC) subjective score. Postoperative knee stability of the patients was evaluated using the Lachman test and the pivot-shift test. The mean ages of the patients were 31.1 (16-55) and 28.7 (18-48) years in groups 1 and 2, respectively. The average follow-up durations were 26 (20-30) and 25.9 (22-30) months for both groups. There was no significant difference between the preoperative and postoperative Lysholm's score, Tegner's activity score, and IKDC subjective score in groups 1 and 2. There were no major complications or reruptures in either group. ACLR incorporating the "modified all-inside" ACLR technique obtained significant clinical outcomes compared to ACLR with a suspensory femoral fixation and a bioabsorbable tibial interference screw.
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Affiliation(s)
- Mahir Mahirogullari
- Department of Orthopaedics and Traumatology, Sisli Memorial Hospital, Istanbul, Turkey
| | - Lokman Kehribar
- Department of Orthopaedics and Traumatology, Samsun Gazi State Hospital, Samsun, Turkey
| | - Serkan Surucu
- Department of Orthopaedic Surgery, University of Missouri Kansas City, Kansas City, USA
| | - Mahmut E Kayaalp
- Department of Orthopaedics and Traumatology, Istanbul Taksim Training and Research Hospital, Istanbul,Turkey
| | - Ali K Yilmaz
- Faculty of Yaşar Dogu Sport Sciences, Ondokuz Mayıs University, Samsun, Turkey
| | - Mahmud Aydin
- Department of Orthopaedics and Traumatology, Haseki Training and Research Hospital, Sultangazi, İstanbul, Turkey
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25
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Schützenberger S, Keller F, Grabner S, Kontic D, Schallmayer D, Komjati M, Fialka C. ACL reconstruction with femoral and tibial adjustable versus fixed-loop suspensory fixation: a retrospective cohort study. J Orthop Surg Res 2022; 17:244. [PMID: 35440030 PMCID: PMC9020032 DOI: 10.1186/s13018-022-03128-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 04/06/2022] [Indexed: 11/10/2022] Open
Abstract
Background Cortical suspensory fixation (CSF) devices gain more and more popularity as a reliable alternative to interference screws for graft fixation in anterior cruciate ligament (ACL) reconstruction. Adjustable-loop fixation may be associated with increased anterior laxity and inferior clinical outcome. The purpose of the study was to compare anterior laxity and clinical outcome after minimally invasive all-inside ACL reconstruction using an adjustable-loop (AL) to a standard technique with a fixed-loop (FL) CSF device. Methods Patients who underwent primary single-bundle ACL reconstruction with a quadrupled hamstring autograft at a single institution between 2012 and 2016 were reviewed. In the AL group minimally invasive popliteal tendon harvesting was performed with an all-inside approach (femoral and tibial sockets). In the FL group a traditional anteromedial approach was used for tendon harvesting and a femoral socket and full tibial tunnel were drilled. An objective clinical assessment was performed with Telos x-rays and the International Knee Documentation Committee (IKDC) Objective Score. Patient-reported outcomes (PRO) included the IKDC Subjective Score, the Lysholm Knee Score, the Knee Injury and Osteoarthritis Score (KOOS) and the Tegner Activity Scale. Results A total of 67 patients were enrolled in this retrospective study with a mean follow-up of 4 (± 1.5) years. The groups were homogenous at baseline regarding age, gender, and the time to surgery. At follow-up, no statistically significant differences were found regarding anterior laxity (AL: 2.3 ± 3 mm vs. FL: 2.3 ± 2.6 mm, p = 0.981). PRO scores were comparable between the AL and FL groups (IKDC score, 84.8 vs. 88.8, p = 0.185; Lysholm 87.3 vs. 89.9, p = 0.380; KOOS 90.7 vs. 91.4, p = 0.720; Tegner 5.5 vs. 6.2, p = 0.085). The rate of saphenous nerve lesions was significantly lower in the AL group with popliteal harvesting of the tendon (8.3% vs. 35.5%, p = 0.014). Conclusion The use of an adjustable-loop device on the femoral and tibial side led to similar stability and clinical results compared to a fixed-loop device.
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Affiliation(s)
- Sebastian Schützenberger
- Department of Orthopaedic Surgery and Traumatology, AUVA Traumacenter Meidling, Kundratstrasse 37, 1120, Vienna, Austria.
| | - F Keller
- Department of Orthopaedic Surgery and Traumatology, AUVA Traumacenter Meidling, Kundratstrasse 37, 1120, Vienna, Austria
| | - S Grabner
- Department of Orthopaedic Surgery and Traumatology, AUVA Traumacenter Meidling, Kundratstrasse 37, 1120, Vienna, Austria
| | - D Kontic
- Department of Orthopaedic Surgery and Traumatology, AUVA Traumacenter Meidling, Kundratstrasse 37, 1120, Vienna, Austria
| | - D Schallmayer
- Department of Orthopaedic Surgery and Traumatology, AUVA Traumacenter Meidling, Kundratstrasse 37, 1120, Vienna, Austria
| | - M Komjati
- Department of Orthopaedic Surgery, Sacred Heart of Jesus Hospital, Vienna, Austria
| | - C Fialka
- Department of Orthopaedic Surgery and Traumatology, AUVA Traumacenter Meidling, Kundratstrasse 37, 1120, Vienna, Austria.,Department for Traumatology, Sigmund Freud Medical University, Vienna, Austria
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26
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Rahardja R, Love H, Clatworthy MG, Monk AP, Young SW. Suspensory Versus Interference Tibial Fixation of Hamstring Tendon Autografts in Anterior Cruciate Ligament Reconstruction: Results From the New Zealand ACL Registry. Am J Sports Med 2022; 50:904-911. [PMID: 35048720 DOI: 10.1177/03635465211070291] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND The hamstring tendon is frequently used to reconstruct the anterior cruciate ligament (ACL), but there is a lack of consensus on the optimal method of fixation. Registry studies have shown that the type of femoral fixation device can influence the risk of revision ACL reconstruction (ACLR), but it is unclear whether the type of tibial fixation has an effect. In New Zealand, over 95% of hamstring tendon grafts are fixed with an adjustable loop suspensory device on the femoral side, with variable usage between suspensory and interference devices, with or without a sheath, on the tibial side. PURPOSE To investigate the association between the type of tibial fixation device and the risk of revision ACLR. STUDY DESIGN Cohort Study; Level of evidence, 2. METHODS Prospective data recorded in the New Zealand ACL Registry were analyzed. Only primary ACLRs performed with a hamstring tendon autograft fixed with a suspensory device on the femoral side were included. A Cox regression survival analysis with adjustment for patient factors was performed to analyze the effects of the type of tibial fixation device, the number of graft strands, and graft diameter on the risk of revision. RESULTS A total of 6145 primary ACLRs performed between 2014 and 2019 were analyzed. A total of 59.6% of hamstring tendon autografts were fixed with a suspensory device on the tibial side (n = 3662), 17.6% with an interference screw with a sheath (n = 1079), and 22.8% with an interference screw without a sheath (n = 1404). When compared with suspensory devices, a higher revision risk was observed when using an interference screw with a sheath (adjusted hazard ratio [HR], 2.05; P = .009) and without a sheath (adjusted HR, 1.81; P = .044). The number of graft strands and a graft diameter of ≥8 mm were associated with the rate of revision on the univariate analysis; however, after adjusting for confounding variables on the multivariate analysis, they did not significantly influence the risk of revision. CONCLUSION In this study of hamstring tendon autografts fixed with an adjustable loop suspensory device on the femoral side during primary ACLR, the use of an interference screw, with or without a sheath, on the tibial side resulted in a higher revision rate when compared with a suspensory device.
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Affiliation(s)
- Richard Rahardja
- Department of Surgery, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | | | - Mark G Clatworthy
- Department of Orthopaedic Surgery, Middlemore Hospital, Auckland, New Zealand
| | - Andrew P Monk
- Department of Surgery, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.,Department of Orthopaedic Surgery, Auckland Hospital, Auckland, New Zealand
| | - Simon W Young
- Department of Surgery, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.,Department of Orthopaedic Surgery, North Shore Hospital, Auckland, New Zealand
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Strength of interference screw fixation of meniscus prosthesis matches native meniscus attachments. Knee Surg Sports Traumatol Arthrosc 2022; 30:2259-2266. [PMID: 34665300 PMCID: PMC9206603 DOI: 10.1007/s00167-021-06772-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Accepted: 10/07/2021] [Indexed: 12/18/2022]
Abstract
PURPOSE Meniscal surgery is one of the most common orthopaedic surgical interventions. Total meniscus replacements have been proposed as a solution for patients with irreparable meniscal injuries. Reliable fixation is crucial for the success and functionality of such implants. The aim of this study was to characterise an interference screw fixation system developed for a novel fibre-matrix-reinforced synthetic total meniscus replacement in an ovine cadaveric model. METHODS Textile straps were tested in tension to failure (n = 15) and in cyclic tension (70-220 N) for 1000 cycles (n = 5). The textile strap-interference screw fixation system was tested in 4.5 mm-diameter single anterior and double posterior tunnels in North of England Mule ovine tibias aged > 2 years using titanium alloy (Ti6Al4Va) and polyether-ether-ketone (PEEK) screws (n ≥ 5). Straps were preconditioned, dynamically loaded for 1000 cycles in tension (70-220 N), the fixation slippage under cyclic loading was measured, and then pulled to failure. RESULTS Strap stiffness was at least 12 times that recorded for human meniscal roots. Strap creep strain at the maximum load (220 N) was 0.005 following 1000 cycles. For all tunnels, pull-out failure resulted from textile strap slippage or bone fracture rather than strap rupture, which demonstrated that the textile strap was comparatively stronger than the interference screw fixation system. Pull-out load (anterior 544 ± 119 N; posterior 889 ± 157 N) was comparable to human meniscal root strength. Fixation slippage was within the acceptable range for anterior cruciate ligament graft reconstruction (anterior 1.9 ± 0.7 mm; posterior 1.9 ± 0.5 mm). CONCLUSION These findings show that the textile attachment-interference screw fixation system provides reliable fixation for a novel ovine meniscus implant, supporting progression to in vivo testing. This research provides a baseline for future development of novel human meniscus replacements, in relation to attachment design and fixation methods. The data suggest that surgical techniques familiar from ligament reconstruction may be used for the fixation of clinical meniscal prostheses.
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28
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On Measuring Implant Fixation Stability in ACL Reconstruction. SENSORS 2021; 21:s21196632. [PMID: 34640951 PMCID: PMC8513052 DOI: 10.3390/s21196632] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/29/2021] [Accepted: 10/02/2021] [Indexed: 11/17/2022]
Abstract
Numerous methods and devices are available for implant fixation in anterior cruciate ligament (ACL) reconstruction. Biomechanical data indicate high variability in fixation stability across different devices. This study aims to provide a better insight into measuring the structural characteristics and mechanical behavior of ACL implant fixations. Fourteen human tibial specimens with reconstructed ACLs were subjected to progressively increasing dynamic loading until failure. The motions of the tibia, the proximal and distal graft ends, as well as the testing frame and actuator, were continuously recorded via a motion tracking system. Significantly higher displacements of the machine actuator (1.0 mm at graft slippage onset, and 12.2 mm at ultimate load) were measured compared to the displacements of the proximal (0.8 and 4.3 mm, respectively) and distal graft (0.1 and 3.4 mm, respectively) ends. The displacements measured at different sites showed significant correlations. The provided data suggest significant and systematic inaccuracies in the stiffness and slippage of the fixation when using machine displacement, as commonly reported in the literature. The assessment of the distal graft displacement excludes the artifactual graft elongation, and most accurately reflects the graft slippage onset indicating clinical failure. Considering the high displacement at the ultimate load, the ultimate load could be used as a standardized variable to compare different fixation methods. However, the ultimate load alone is not sufficient to qualitatively describe fixation stability.
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29
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Sun T, Zhang H. Biomechanical Comparison of a Novel Tibial Fixation Technique Versus Interference Screw Fixation for ACL Reconstruction Using Soft Tissue Grafts. Orthop J Sports Med 2021; 9:23259671211028559. [PMID: 34458385 PMCID: PMC8392818 DOI: 10.1177/23259671211028559] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Accepted: 02/09/2021] [Indexed: 11/16/2022] Open
Abstract
Background: Controversy remains regarding the optimal technique for tibial fixation of soft tissue grafts in anterior cruciate ligament (ACL) reconstruction. Purpose/Hypothesis: To compare the biomechanical outcomes of a novel transtibial tubercle fixation technique with those of a commonly utilized interference screw fixation at the tibial site. Our hypothesis was that transtibial tubercle fixation achieves higher ultimate failure loads than interference screw fixation. Study Design: Controlled laboratory study. Methods: We used 24 matched porcine tibias and digital extensor tendons, from which 12 grafts and tibial tunnels were prepared using the novel transtibial tubercle fixation technique and 12 were prepared using the interference screw fixation technique. The specimens underwent a cyclic loading test (50-250 N applied for 1000 cycles at a frequency of 1 Hz), followed by a load-to-failure test. The slippage, stiffness, and ultimate failure loads were compared between the techniques. Results: No differences in slippage were found during the cyclic loading test, and no graft fixation or tibial complex failures occurred during cyclic testing in either group. The transtibial tubercle fixation technique had higher ultimate failure loads (mean ± SD, 756.28 ± 123.43 N) as compared with interference screw fixation (602.15 ± 81.62 N; P < .05). The grafts in the transtibial tubercle fixation group were less stiff than those in the interference screw fixation group (84.43 vs 101.23 N/mm; P < .05). Conclusion: Transtibial tubercle fixation achieved higher ultimate failure loads than interference screw fixation in the load-to-failure test. Clinical Relevance: The novel transtibial tubercle fixation technique compared favorably with interference screw fixation during ACL reconstruction. This technique does not require hardware, has a low cost, theoretically eliminates the risk of complications associated with hardware implantation (eg, graft damage and pain attributed to retained hardware requiring removal), and is relatively easy to perform.
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Affiliation(s)
| | - Hangzhou Zhang
- Department of Orthopedics, Joint Surgery and Sports Medicine, First Affiliated Hospital of China Medical University, Shenyang, China
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30
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Does a combined screw and dowel construct improve tibial fixation during anterior cruciate ligament reconstruction? EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY AND TRAUMATOLOGY 2021; 32:759-765. [PMID: 34125380 DOI: 10.1007/s00590-021-03049-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 04/28/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE The aims of the present study were to compare the biomechanical properties of tibial fixation in hamstring-graft ACL reconstruction using interference screw and a novel combination interference screw and dowel construct. MATERIAL AND METHODS We compared the fixation of 30 (2- and 4-stranded gracilis and semitendinosis tendons) in 15 fresh-frozen porcine tibiae with a biocomposite resorbable interference screw (Group 1) and a screw and dowel construct (Group 2). Each graft was subjected to load-to-failure testing (50 mm/min) to determine maximum load, displacement at failure and pullout strength. RESULTS There were no significant differences between the biomechanical properties of the constructs. Multivariate analysis demonstrated that combination constructs (β = 140.20, p = 0.043), screw diameter (β = 185, p = 0.006) and 4-strand grafts (β = 51, p = 0.050) were associated with a significant increase in load at failure. Larger screw diameter was associated with increased construct stiffness (β = 20.15, p = 0.020). CONCLUSION The screw and dowel construct led to significantly increased fixation properties compared to interference screws alone in a porcine model. Increased screw diameter and utilization of 4-strand ACL grafts also led to improvement in load-to-failure of the construct. However, this is an in vitro study and additional investigations are needed to determine whether the results are reproducible in vivo. LEVEL OF EVIDENCE Level V; Biomechanical study.
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Furumatsu T, Hiranaka T, Kodama Y, Kamatsuki Y, Okazaki Y, Yamawaki T, Endo H, Ozaki T. Intraarticular lengths of double-bundle grafts can change during knee flexion: Intraoperative measurements in anatomic anterior cruciate ligament reconstructions. Orthop Traumatol Surg Res 2021; 107:102816. [PMID: 33484904 DOI: 10.1016/j.otsr.2021.102816] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 08/11/2020] [Accepted: 09/14/2020] [Indexed: 02/03/2023]
Abstract
BACKGROUND The lengths of the anteromedial bundle (AMB) and posterolateral bundle (PLB) change during knee motion in double-bundle anterior cruciate ligament (ACL) reconstruction. However, the actual intraarticular graft length would be affected by the bone tunnel position and tunnel creation angle during ACL reconstruction. The aim of this study was to investigate the intraarticular length change of the AMB and PLB in patients who underwent anatomic double-bundle ACL reconstruction. HYPOTHESIS We hypothesized that the PLB would show a more dynamic length change pattern than the AMB during knee flexion at ACL reconstruction. METHODS Thirty-two patients (16 men and 16 women) who had isolated ACL injuries with intact menisci were investigated. Anatomic double-bundle ACL reconstructions were performed using semitendinosus tendon autografts at a mean age of 30.6 years. The graft and tunnel lengths were measured intraoperatively. Intraarticular graft lengths and length changes were calculated at 0° and 90° of knee flexion during ACL reconstruction. Intraoperative data were collected prospectively, and analyses were performed retrospectively. RESULTS The intraarticular length of the AMB at 0° of knee flexion was 28.1±5.5mm. At 90° of knee flexion, the AMB intraarticular length decreased to 25.6±4.8mm. The intraarticular length of the PLB decreased to 17.7±4.6mm at 90° of knee flexion compared to 22.0±4.2mm at 0° of knee flexion. Changes in the intraarticular graft length during knee flexion were detected more in the PLB (4.1mm) than in the AMB (2.0mm, p=0.01). DISCUSSION This study demonstrated that the intraarticular length change of the PLB during knee motion was larger than that of the AMB in anatomic double-bundle ACL reconstructions with semitendinosus tendon autografts and suspensory femoral fixation devices. LEVEL OF EVIDENCE IV; retrospective cohort study.
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Affiliation(s)
- Takayuki Furumatsu
- Department of Orthopaedic Surgery, Okayama University Hospital, 2-5-1 Shikatacho, Kitaku, 700-8558 Okayama, Japan; Department of Orthopaedic Surgery, Sumitomo Besshi Hospital, 3-1 Oujicho, Niihama, 792-8543 Ehime, Japan; Department of Orthopaedic Surgery, Kousei Hospital, 3-8-35 Kouseicho, Kitaku, 700-0985 Okayama, Japan.
| | - Takaaki Hiranaka
- Department of Orthopaedic Surgery, Okayama University Hospital, 2-5-1 Shikatacho, Kitaku, 700-8558 Okayama, Japan; Department of Orthopaedic Surgery, Sumitomo Besshi Hospital, 3-1 Oujicho, Niihama, 792-8543 Ehime, Japan
| | - Yuya Kodama
- Department of Orthopaedic Surgery, Okayama University Hospital, 2-5-1 Shikatacho, Kitaku, 700-8558 Okayama, Japan
| | - Yusuke Kamatsuki
- Department of Orthopaedic Surgery, Okayama University Hospital, 2-5-1 Shikatacho, Kitaku, 700-8558 Okayama, Japan
| | - Yuki Okazaki
- Department of Orthopaedic Surgery, Okayama University Hospital, 2-5-1 Shikatacho, Kitaku, 700-8558 Okayama, Japan
| | - Tadashi Yamawaki
- Department of Orthopaedic Surgery, Okayama University Hospital, 2-5-1 Shikatacho, Kitaku, 700-8558 Okayama, Japan; Department of Orthopaedic Surgery, Kousei Hospital, 3-8-35 Kouseicho, Kitaku, 700-0985 Okayama, Japan
| | - Hirosuke Endo
- Department of Orthopaedic Surgery, Okayama University Hospital, 2-5-1 Shikatacho, Kitaku, 700-8558 Okayama, Japan
| | - Toshifumi Ozaki
- Department of Orthopaedic Surgery, Okayama University Hospital, 2-5-1 Shikatacho, Kitaku, 700-8558 Okayama, Japan
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de Sa D, Crum RJ, Rabuck S, Ayeni O, Bedi A, Baraga M, Getgood A, Kaar S, Kropf E, Mauro C, Peterson D, Vyas D, Musahl V, Lesniak BP. The REVision Using Imaging to Guide Staging and Evaluation (REVISE) in ACL Reconstruction Classification. J Knee Surg 2021; 34:509-519. [PMID: 31569256 PMCID: PMC8995042 DOI: 10.1055/s-0039-1697902] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Revision anterior cruciate ligament (ACL) procedures are increasing in incidence and possess markedly inferior clinical outcomes (76% satisfaction) and return-to-sports (57%) rates than their primary counterparts. Given their complexity, a universal language is required to identify and communicate the technical challenges faced with revision procedures and guide treatment strategies. The proposed REV: ision using I: maging to guide S: taging and E: valuation (REVISE) ACL (anterior cruciate ligament) Classification can serve as a foundation for this universal language that is feasible and practical with acceptable inter-rater agreement. A focus group of sports medicine fellowship-trained orthopaedic surgeons was assembled to develop a classification to assess femoral/tibial tunnel "usability" (placement, widening, overlap) and guide the revision reconstruction strategy (one-stage vs. two-stage) post-failed ACL reconstruction. Twelve board-certified sports medicine orthopaedic surgeons independently applied the classification to the de-identified computed tomographic (CT) scan data of 10 patients, randomly selected, who failed ACL reconstruction. An interclass correlation coefficient (ICC) was calculated (with 95% confidence intervals) to assess agreement among reviewers concerning the three major classifications of the proposed system. Across surgeons, and on an individual patient basis, there was high internal validity and observed agreement on treatment strategy (one-stage vs. two-stage revision). Reliability testing of the classification using CT scan data demonstrated an ICC (95% confidence interval) of 0.92 (0.80-0.98) suggesting "substantial" agreement between the surgeons across all patients for all elements of the classification. The proposed REVISE ACL Classification, which employs CT scan analysis to both identify technical issues and guide revision ACL treatment strategy (one- or two-stage), constitutes a feasible and practical system with high internal validity, high observed agreement, and substantial inter-rater agreement. Adoption of this classification, both clinically and in research, will help provide a universal language for orthopaedic surgeons to discuss these complex clinical presentations and help standardize an approach to diagnosis and treatment to improve patient outcomes. The Level of Evidence for this study is 3.
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Affiliation(s)
- Darren de Sa
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Raphael J Crum
- School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Stephen Rabuck
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Olufemi Ayeni
- Department of Orthopaedic Surgery, McMaster University, Hamilton, Ontario, Canada
| | - Asheesh Bedi
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan
| | - Michael Baraga
- Department of Orthopaedic Surgery, University of Miami, Miami, Florida
| | - Alan Getgood
- Fowler Kennedy Sport Medicine Clinic, Western University, London, Ontario, Canada
| | - Scott Kaar
- Department of Orthopaedic Surgery, Saint Louis University, St. Louis, Missouri
| | - Eric Kropf
- Temple Orthopaedics at the Navy Yard, Vincera Institute, Philadelphia, Pennsylvania
| | - Craig Mauro
- Burke and Bradley Orthopaedics, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Devin Peterson
- Department of Orthopaedic Surgery, McMaster University, Hamilton, Ontario, Canada
| | - Dharmesh Vyas
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Volker Musahl
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Bryson P Lesniak
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania
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Adjustable suspension versus hybrid fixation in hamstring autograft anterior cruciate ligament reconstruction. Knee 2021; 28:1-8. [PMID: 33278738 DOI: 10.1016/j.knee.2020.10.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 08/25/2020] [Accepted: 10/17/2020] [Indexed: 02/02/2023]
Abstract
BACKGROUND There has been increased use of adjustable suspensory fixation (ASF) for anterior cruciate ligament reconstruction (ACLR). Potential benefits are the ability to use a shorter graft and to prevent graft displacement and damage. The purpose of this study was to establish the efficacy of this fixation method and assess whether it leads to less tunnel widening, and avoids known complications of screw fixation. METHODS Thirty-eight patients who underwent ACLR with ASF on both the femoral and tibial sides met the inclusion criteria and were propensity matched demographically with 38 patients who underwent hybrid fixation with femoral suspensory and tibial screw and sheath. At one-year, KT-1000 knee laxity measurements were recorded and detailed MRI analysis looking at tunnel aperture widening, tunnel appearance, graft integration within the tunnels, and graft healing. RESULTS MRI comparison between ASF and hybrid cohorts revealed no significant differences in graft signal or integration, and clinically there were no differences in knee laxity between cohorts (mean 1.5 mm ± 2.0 and 1.5 mm ± 2.3 (n.s.) in the ASF and hybrid fixation respectively). Significantly less aperture tibial tunnel widening (2.2 mm versus 4.4 mm, p < 0.0001) and tibial cysts (2 versus 9, p = 0.047) were observed in the ASF cohort, whilst mean femoral tunnel widening was comparable between both cohorts (ASF 2.8 mm, hybrid 3.2 mm; n.s.). CONCLUSIONS Hamstring autografts for ACLR fixed using either ASF or a hybrid fixation technique provided comparable knee stability and MRI graft signal intensity. Tibial ASF demonstrated significantly less tibial aperture widening and tunnel cyst formation when compared to screw and sheath fixation.
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Wang J, Fan HQ, Dai W, Li HD, Fu YP, Liu Z, Huang CM, Shi Z. Safety of the application of Rigidfix cross-pin system via different tibial tunnels for tibial fixation during anterior cruciate ligament reconstruction. BMC Musculoskelet Disord 2020; 21:736. [PMID: 33176762 PMCID: PMC7661174 DOI: 10.1186/s12891-020-03645-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 09/14/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND We investigate the safety of the application of the Rigidfix cross-pin system via different tibial tunnels in the tibial fixation during anterior cruciate ligament (ACL) reconstruction. METHODS Five adult fresh cadaver knees were fixed with the Rigidfix cross-pins in the tibial fixation site during ACL reconstruction. Two different tibial tunnel groups were established: in group A, the tunnel external aperture was placed at the 25° angle of coronal section; in group B, the tunnel external aperture was placed at the 45° angle of coronal section. The guide was placed at the plane 0.5 mm below articular facet through the tibial tunnel, with three rotation positions set at 0°, 30°, and 60° slopes. The incidences of iatrogenic injuries at tibial plateau cartilage (TPC), medial collateral ligament (MCL), and patellar tendon in three different slope angles were calculated in groups A and B and the results were analyzed by using chi square test. RESULTS The iatrogenic injuries at MCL, TPC, and patellar tendon could occur after the Rigidfix cross-pin system was placed 5 mm below tibial plateau cartilage for ACL reconstruction. The incidences of TPC injury (χ2 = 5.662, P = 0.017) and MCL injury (P = 0.048, Fisher exact probability method) were significantly lower in group A than in group B. However, the incidence of patellar tendon injury showed no significant difference between these two groups (χ2 = 0.120, P = 0.729). CONCLUSIONS When the Rigidfix cross-pin system is used for ACL reconstruction at the tibial fixation site, the external aperture of tibial tunnel should not be placed at the excessively posterosuperior site, to avoid MCL and TPC injuries.
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Affiliation(s)
- Jian Wang
- Department of Orthopaedic Surgery, Nanfang hospital, Southern Medical University, Guangdong, 510515, People's Republic of China
| | - Hua-Qiang Fan
- Department of Orthopaedic Surgery, Chenggong Hospital Affiliated to Xiamen University, Xiamen, 361003, Fujian Province, People's Republic of China
| | - Wenli Dai
- Institute of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, 100191, People's Republic of China
| | - Hong-Da Li
- Department of Orthopaedic Surgery, Chenggong Hospital Affiliated to Xiamen University, Xiamen, 361003, Fujian Province, People's Republic of China
| | - Yang-Pan Fu
- Department of Orthopaedic Surgery, Chenggong Hospital Affiliated to Xiamen University, Xiamen, 361003, Fujian Province, People's Republic of China
| | - Zhenhuang Liu
- Department of Orthopaedic Surgery, Chenggong Hospital Affiliated to Xiamen University, Xiamen, 361003, Fujian Province, People's Republic of China
| | - Chang-Ming Huang
- Department of Orthopaedic Surgery, Chenggong Hospital Affiliated to Xiamen University, Xiamen, 361003, Fujian Province, People's Republic of China
| | - Zhanjun Shi
- Department of Orthopaedic Surgery, Nanfang hospital, Southern Medical University, Guangdong, 510515, People's Republic of China.
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Roger J, Bertani A, Vigouroux F, Mottier F, Gaillard R, Have L, Rongièras F. ACL reconstruction using a quadruple semitendinosus graft with cortical fixations gives suitable isokinetic and clinical outcomes after 2 years. Knee Surg Sports Traumatol Arthrosc 2020; 28:2468-2477. [PMID: 32699919 DOI: 10.1007/s00167-020-06121-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 06/24/2020] [Indexed: 12/17/2022]
Abstract
PURPOSE The objective of this single-center randomized single-blinded trial was to assess the hypothesis that anterior cruciate ligament reconstruction (ACLR) using a four-strand semitendinosus (ST) graft with adjustable femoral and tibial cortical fixation produced good outcomes compared to an ST/gracilis (ST/G) graft with femoral pin transfixation and tibial bioscrew fixation. Follow-up was 2 years. METHODS Patients older than 16 years who underwent primary isolated ACLR included for 1 year until August 2017 were eligible. The primary outcome measures were the subjective International Knee Documentation Committee (IKDC) score, isokinetic muscle strength recovery, and return to work within 2 years. The study was approved by the ethics committee. RESULTS Of 66 eligible patients, 60 completed the study and were included, 33 in the 4ST group and 27 in the ST/G group. Mean age was 30.5 ± 8.9 years in the 4ST group and 30.3 ± 8.5 in the ST/G group (n.s.). No significant between-group differences were found for mean postoperative subjective IKDC (4ST group, 80.2 ± 12.5; ST/G group, 83.6 ± 13.6; n.s.), side-to-side percentage deficits in isokinetic hamstring strength (at 60°/s: ST group, 17% ± 16%; ST/G group, 14% ± 11%; n.s.) or quadriceps strength (at 60°/s: ST group, 14% ± 12%; ST/G group, 19% ± 17%; n.s.), return to work, pain during physical activities, side-to-side differential laxity, balance, loss of flexion/extension, or surgical complications. CONCLUSION This trial demonstrates that functional outcomes after 4ST for ACLR with cortical fixations could be as good, although not better, than those obtained using ST/G. The 4ST technique spares the gracilis tendon, which thus preserves the medial sided muscle and thereby could improve function and limit donor-side morbidity. LEVEL OF EVIDENCE Level I.
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Affiliation(s)
- Julien Roger
- Division of Orthopaedic Surgery, Department of Surgery, Hôpital de La Croix Rousse, Hospices Civils de Lyon, 103 Grande Rue de la Croix Rousse, 69004, Lyon, France.
| | - Antoine Bertani
- Division of Orthopaedic Surgery, Department of Surgery, Hôpital Edouard Herriot, Hospices Civils de Lyon, Lyon, France.
| | - Florence Vigouroux
- Division of Orthopaedic Surgery, Department of Surgery, Hôpital d'Instruction des Armées Bégin, Service de Santé des Armées, Saint-Mandé, France
| | - Franck Mottier
- Division of Orthopaedic Surgery, Department of Surgery, Centre Hospitalier Pierre Oudot, Bourgoin-Jallieu, France
| | - Romain Gaillard
- Division of Orthopaedic Surgery, Department of Surgery, Hôpital de La Croix Rousse, Hospices Civils de Lyon, 103 Grande Rue de la Croix Rousse, 69004, Lyon, France
| | - Laurence Have
- Department of Physical and Medical Rehabilitation, Hôpital Edouard Herriot, Hospices Civils de Lyon, Lyon, France
| | - Frédéric Rongièras
- Division of Orthopaedic Surgery, Department of Surgery, Hôpital Edouard Herriot, Hospices Civils de Lyon, Lyon, France
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Fu CW, Chen WC, Lu YC. Is all-inside with suspensory cortical button fixation a superior technique for anterior cruciate ligament reconstruction surgery? A systematic review and meta-analysis. BMC Musculoskelet Disord 2020; 21:445. [PMID: 32635920 PMCID: PMC7341582 DOI: 10.1186/s12891-020-03471-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 07/02/2020] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND To compare the clinical results of all-inside anterior cruciate ligament reconstruction (ACLR) using suspensory cortical button fixation and full tibial tunnel drilling. METHODS Systematic searches were conducted of published literature up to November 2019 on PubMed, Embase, and Cochrane for studies comparing all-inside ACLR using suspensory cortical button fixation and full tibial tunnel ACLR. Two reviewers independently determined eligibility, extracted the outcome data, and assessed the risk of bias of the eligible studies. The clinical outcome and graft reruptures were pooled by using random effects with mean differences and risk ratios for continuous and dichotomous variables, respectively. RESULT A total of nine studies (five randomized controlled trials and four comparative studies) involving 613 patients were included in the meta-analysis. The postoperative functional outcome, knee laxity measured with arthrometer, and graft reruptures were comparable between patients with all-inside ACLR using suspensory cortical button fixation and full tibial tunnel ACLR. However, a significantly greater thickness of autologous tendon was used and less change in drilling tunnel diameter was noted in patients with suspensory cortical button graft fixation. CONCLUSIONS All-inside ACLR with suspensory cortical button fixation was not clinically superior to full tibial tunnel ACLR with interference screw fixation in functional outcomes, knee laxity measured with arthrometer, or rerupture rate. However, the advantage of using suspensory cortical button fixation was that a thicker graft could be used for reconstruction, and brought less tibia tunnel widening compared with bioabsorbable interference screw fixation.
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Affiliation(s)
- Chun-Wei Fu
- Department of Orthopedic Surgery, Mackay Memorial Hospital, No. 92, Sec. 2, Zhongshan N. Rd., Zhongshan Dist., Taipei City, 104, Taiwan, R. O. C..
| | - Wei-Cheng Chen
- Department of Orthopedic Surgery, Mackay Memorial Hospital, No. 92, Sec. 2, Zhongshan N. Rd., Zhongshan Dist., Taipei City, 104, Taiwan, R. O. C
| | - Yung-Chang Lu
- Department of Orthopedic Surgery, Mackay Memorial Hospital, No. 92, Sec. 2, Zhongshan N. Rd., Zhongshan Dist., Taipei City, 104, Taiwan, R. O. C
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Hagemans FJA, van Overvest KLJ, Zijl JAC, Meuffels DE. Four-strand hamstring graft is stiffer than a tripled semitendinosus graft in anterior cruciate ligament reconstruction: a cadaveric study. J Exp Orthop 2020; 7:37. [PMID: 32462522 PMCID: PMC7253562 DOI: 10.1186/s40634-020-00254-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 05/13/2020] [Indexed: 01/11/2023] Open
Abstract
Purpose The aim of this study was to compare the biomechanics of a four-strand hamstring graft with a tripled semitendinosus graft, with and without adjustable extra-cortical button fixation, in a cadaveric model. Methods Four groups of 10 cadaveric hamstrings were tested: In group A, a tripled semitendinosus graft fixated with two adjustable extra-cortical buttons; in Group B, a four-strand semitendinosus and gracilis graft fixated with an adjustable extra-cortical button and a clamp; in group C, a tripled semitendinosus graft fixated to a steel hook and a clamp; in group D, a four-strand semitendinosus and gracilis graft fixated to a steel hook and a clamp. Each group was submitted to a cyclic loading test (1000 cycles between 50 and 250 Newton at a frequency of 0.5 hertz) and a load-to-failure test. Primary outcomes were ultimate failure load and stiffness. Secondary outcomes were graft elongation and graft diameter. Results There was no difference in ultimate failure load among groups. Group B achieved a median stiffness of 171 N/mm (interquartile range [IQR] 139–204) which was significantly higher than Group A (median 103 N/mm (74–119), p < 0.01). Group B showed more cyclic elongation (4.1 mm (3.4–5.7)) compared to group D (2.3 mm (1.9–3.0)), and also lower stiffness was noted (171 N/mm (139–204) vs 265 N/mm (227–305)). There was no difference in graft diameter among groups. Conclusions The results of this study indicate that higher stiffness can be achieved using four-strand hamstring tendon grafts compared to tripled semitendinosus grafts when using femoral extra-cortical buttons, despite comparable graft diameters. Thereby, the use of adjustable extra-cortical fixation devices may result in more cyclic elongation and lower stiffness of the graft.
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Affiliation(s)
- Frans J A Hagemans
- Department of Orthopaedics and Centre for Orthopaedic Research Alkmaar (CORAL), Northwest clinics, Wilhelminalaan 12, NL - 1815 JD, Alkmaar, The Netherlands. .,Department of Orthopaedic Surgery, Erasmus MC, University Medical Centre Rotterdam, the Netherlands, Doctor Molewaterplein 40, NL- 3015 GD, Rotterdam, The Netherlands.
| | - Karlijn L J van Overvest
- Department of Orthopaedic Surgery, Antonius Hospital, Nieuwegein Koekoekslaan 1, NL - 3435 CM, Nieuwegein, The Netherlands
| | - Jacco A C Zijl
- Department of Orthopaedic Surgery, Antonius Hospital, Nieuwegein Koekoekslaan 1, NL - 3435 CM, Nieuwegein, The Netherlands
| | - Duncan E Meuffels
- Department of Orthopaedic Surgery, Erasmus MC, University Medical Centre Rotterdam, the Netherlands, Doctor Molewaterplein 40, NL- 3015 GD, Rotterdam, The Netherlands
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Mayr R, Smekal V, Koidl C, Coppola C, Eichinger M, Rudisch A, Kranewitter C, Attal R. ACL reconstruction with adjustable-length loop cortical button fixation results in less tibial tunnel widening compared with interference screw fixation. Knee Surg Sports Traumatol Arthrosc 2020; 28:1036-1044. [PMID: 31372680 DOI: 10.1007/s00167-019-05642-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 07/15/2019] [Accepted: 07/19/2019] [Indexed: 12/21/2022]
Abstract
PURPOSE To compare tunnel widening and clinical outcome after anterior cruciate ligament reconstruction (ACLR) with interference screw fixation and all-inside reconstruction using button fixation. METHODS Tunnel widening was assessed using tunnel volume and diameter measurements on computed tomography (CT) scans after surgery and 6 months and 2 years later, and compared between the two groups. The clinical outcome was assessed after 2 years with instrumented tibial anteroposterior translation measurements, hop testing and International Knee Documentation Committee (IKDC), Lysholm and Tegner activity scores. RESULTS The study population at the final follow-up was 14 patients with screw fixation and 16 patients with button fixation. Tibial tunnels with screw fixation showed significantly larger increase in tunnel volume over time (P = 0.021) and larger tunnel diameters after 2 years in comparison with button fixation (P < 0.001). There were no significant differences in femoral tunnel volume changes over time or in tunnel diameters after 2 years. No significant differences were found in the clinical outcome scores. CONCLUSIONS All-inside ACLR using button fixation was associated with less tibial tunnel widening and smaller tunnels after 2 years in comparison with ACLR using screw fixation. The need for staged revision ACLRs may be greater with interference screws in comparison with button fixation at the tibial tunnel. The clinical outcomes in the two groups were comparable. LEVEL OF EVIDENCE II. RCT: Consort NCT01755819.
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Affiliation(s)
- Raul Mayr
- Department of Trauma Surgery, Medical University Innsbruck, Innsbruck, Austria
| | | | - Christian Koidl
- Department of Trauma Surgery, Medical University Innsbruck, Innsbruck, Austria
| | - Christian Coppola
- Department of Trauma Surgery, Medical University Innsbruck, Innsbruck, Austria
| | - Martin Eichinger
- Department of Trauma Surgery, Medical University Innsbruck, Innsbruck, Austria
| | - Ansgar Rudisch
- Department of Radiology, Medical University Innsbruck, Innsbruck, Austria
| | | | - René Attal
- Department of Trauma Surgery and Sports Traumatology, Academic Hospital Feldkirch, LKH Feldkirch, Carinagasse 47, 6807, Feldkirch, Austria.
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Takahashi T, Takahashi M. The improved cortical button shows better breaking strength of sutures compared with 10 original cortical button after cyclic loading. J Exp Orthop 2020; 7:17. [PMID: 32222847 PMCID: PMC7103022 DOI: 10.1186/s40634-020-00232-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 03/10/2020] [Indexed: 01/01/2023] Open
Abstract
Background Suspensory cortical buttons are widely used for fixation of reconstructed ligaments during anterior cruciate ligament (ACL) reconstruction because they have high usability and a favorable fixing force. However, it is not always easy to fix a reconstructed ACL while maintaining appropriate ligament tension. Therefore, we developed an improved cortical button that provides temporary tension until suturing is completed. Methods Button holes of our improved EndoButton are not perpendicular to the bone surface on which the button is placed, but have an angle of 45 degrees so that the button can be temporarily fixed by applying tension to the suture. The improved EndoButton and the original EndoButton (Smith & Nephew Inc., Andover, Massachusetts) were each tied to FiberWire 5/7 metric (5 M) (manufactured by Arthrex). Ten cycles of preliminary loading (0–50 N) were applied to each suture, followed by test loading (0–250 N) for 500 or 1000 cycles. Then, a tensile test was performed at a displacement velocity of 20 mm/min. Results The breaking strength of the sutures of the improved EndoButton were tend to higher than those of the sutures of the original EndoButton after 1000 loading cycles (p = 0.067, d = 0.883). The moduli of rigidity of the sutures of the improved EndoButton were higher than those of the sutures of the original EndoButton after 500 loading cycles (p = 0.027) and remained almost the same regardless of the number of loading cycles. Conclusion We found that compared with the original cortical button, the improved cortical button was better able to retain suture breaking strength and modulus of rigidity, regardless of the number of load cycles.
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Affiliation(s)
- Toshiaki Takahashi
- Department of Sports and Health Science, Faculty of Collaborative Regional Innovation, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime, 790-8577, Japan.
| | - Manabu Takahashi
- Department of Industrial Innovation, Faculty of Collaborative Regional Innovation, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime, 790-8577, Japan
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Noonan BC, Bachmaier S, Wijdicks CA, Bedi A. Independent Suture Tape Reinforcement of Tripled Smaller-Diameter and Quadrupled Grafts for Anterior Cruciate Ligament Reconstruction With Tibial Screw Fixation: A Biomechanical Full Construct Model. Arthroscopy 2020; 36:481-489. [PMID: 31901386 DOI: 10.1016/j.arthro.2019.06.036] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 06/14/2019] [Accepted: 06/22/2019] [Indexed: 02/02/2023]
Abstract
PURPOSE To compare the effect of independent suture tape reinforcement on the dynamic elongation and stiffness behavior as well as ultimate strength of tripled smaller-diameter and quadrupled soft-tissue grafts for anterior cruciate ligament reconstruction (ACLR) with tibial screw fixation in a biomechanical in vitro study. METHODS Tripled smaller-diameter (8 mm) and quadrupled (9 mm) bovine tendon grafts with and without suture tape reinforcement (n = 8 in each group) were tested using femoral suspensory and tibial interference screw fixation. The suture tape was femoral sided and fixed independent from the graft by passing it through the suspensory button and securing the 2 open tibial strands with a secondary interference screw. Dynamic testing was performed in position and force control at 250 N and 400 N, followed by pull to failure with the mode of failure noted. Dynamic elongation, stiffness, and ultimate strength were analyzed. RESULTS Tripled constructs showed a significantly worse structural performance than quadrupled constructs at higher loads. Reinforcement of tripled and quadrupled grafts substantially decreased total elongation by 56% (4.54 ± 0.75 mm vs 2.01 ± 0.50 mm, P < .001) and 39% (3.25 ± 0.49 mm vs 1.98 ± 0.51 mm, P < .001), respectively, by significantly increasing dynamic stiffness. No statistical significance was found between the reinforced groups. Failure loads of reinforced tripled (1,074 ± 148 N vs 829 ± 100 N, P = .003) and quadrupled (1,125 ± 157 N vs 939 ± 76 N, P = .023) grafts were also significantly improved. CONCLUSIONS Independent reinforcement of soft-tissue grafts with suture tape strengthened the performance especially of tripled smaller-diameter grafts for ACLR with tibial screw fixation by significantly improving dynamic elongation at increased stiffness and ultimate strength. Quadrupled reinforced grafts showed no over-constraining and structurally behaved similarly to tripled grafts with reinforcement. CLINICAL RELEVANCE Independent reinforcement for ACLR may provide an option for protecting autografts or allografts against irreversible lengthening during the maturation and remodeling phases of healing.
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Affiliation(s)
| | | | - Coen A Wijdicks
- Department of Orthopaedic Research, Arthrex, Munich, Germany.
| | - Asheesh Bedi
- MedSport and Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan, U.S.A
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Götschi T, Rosenberg G, Li X, Zhang C, Bachmann E, Snedeker JG, Fucentese SF. Biomechanical Evaluation of a Novel Loop Retention Mechanism for Cortical Graft Fixation in ACL Reconstruction. Orthop J Sports Med 2020; 8:2325967120904322. [PMID: 32133387 PMCID: PMC7042561 DOI: 10.1177/2325967120904322] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 11/08/2019] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Implant fixation by means of a cortical fixation device (CFD) has become a routine procedure in anterior cruciate ligament reconstruction. There is no clear consensus whether adjustable-length CFDs are more susceptible to loop lengthening when compared with pretied fixed-length CFDs. PURPOSE To assess biomechanical performance measures of 3 types of CFDs when subjected to various loading protocols. STUDY DESIGN Controlled laboratory study. METHODS Three types of CFDs underwent biomechanical testing: 1 fixed length and 2 adjustable length. One of the adjustable-length devices is based on the so-called finger trap mechanism, and the other is based on a modified sling lock mechanism. A device-only test of 5000 cycles (n = 8 per group) and a tendon-device test of 1000 cycles (n = 8 per group) with lower and upper force limits of 50 and 250 N, respectively, were applied, followed by ramp-to-failure testing. Adjustable-length devices then underwent further cyclic testing with complete loop unloading (n = 5 per group) at each cycle, as well as fatigue testing (n = 3 per group) over a total of 1 million cycles. Derived mechanical parameters were compared among the devices for statistical significance using Kruskal-Wallis analysis of variance followed by post hoc Mann-Whitney U testing with Bonferroni correction. RESULTS All CFDs showed elongation <2 mm after 5000 cycles when tested in an isolated manner and withstood ultimate tensile forces in excess of estimated peak in vivo forces. In both device-only and tendon-device tests, differences in cyclic performance were found among the devices, favoring adjustable-length fixation devices over the fixed-length device. Completely unloading the suspension loops, however, led to excessive loop lengthening of the finger trap device, whereas the modified sling lock device remained stable throughout the test. The fixed-length device displayed superior ultimate strength over both adjustable-length devices. Both adjustable-length devices showed adequate fatigue behavior during high-cyclic testing. CONCLUSION All tested devices successfully prevented critical construct elongation when tested with constant tension and withstood ultimate loads in excess of estimated in vivo forces during the rehabilitation phase. The finger trap device gradually lengthened excessively when completely unloaded during cyclic testing. CLINICAL RELEVANCE Critical loop lengthening may occur if adjustable-length devices based on the finger trap mechanism are repeatedly unloaded in situ.
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Affiliation(s)
- Tobias Götschi
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
- Department of Orthopedics, Balgrist University Hospital, Zurich,
Switzerland
| | | | - Xiang Li
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Chen Zhang
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
- Department of Orthopedics, Second Affiliated Hospital of Xi’an
Jiaotong University, Xi’an, China
| | - Elias Bachmann
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
- Department of Orthopedics, Balgrist University Hospital, Zurich,
Switzerland
| | - Jess G. Snedeker
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
- Department of Orthopedics, Balgrist University Hospital, Zurich,
Switzerland
| | - Sandro F. Fucentese
- Department of Orthopedics, Second Affiliated Hospital of Xi’an
Jiaotong University, Xi’an, China
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The single-suture technique for anterior cruciate ligament graft preparation provides similar stability as a three-suture technique: a biomechanical in vitro study in a porcine model. Arch Orthop Trauma Surg 2020; 140:511-516. [PMID: 31980876 PMCID: PMC7109177 DOI: 10.1007/s00402-020-03350-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Indexed: 01/22/2023]
Abstract
PURPOSE Numerous techniques have been described for the tibial-sided graft preparation in anterior cruciate ligament (ACL) reconstruction. The use of less suture material for graft preparation is thought to improve ingrowth and to reduce the risk for infection. At the same time, the suture construct should be strong enough to resist the surgeon's pull during tensioning of the transplant. METHODS In total, 39 fresh-frozen procine deep flexor tendons were used and prepared as four-strand grafts. In the three-suture group (n = 19), graft preparation was performed using three tibial-sided sutures, with each tendon end sutured separately. In the one-suture group (n = 20), a modified graft preparation using only one tibial-sided suture was applied. Each sample underwent load-to-failure testing (Nmax) after cyclic pre-loading. To estimate intraoperative tension forces acting on the tibial-sided suture constructs, the maximal tension force of 26 volunteers on such a construct was measured using a load cell. RESULTS The biomechanical testing of the two different suture constructs showed a significantly higher load-to-failure for the three-suture group (711 N ± 91 N) compared to the one-suture group (347 N ± 24 N) (p = 0.0001). In both groups, the mode of failure was a tear of the suture in all samples. A failure of the suture-tendon interface was not observed in any case. The median maximal tension force on the construct applied by the 26 volunteers was 134 N (range 73-182 N). CONCLUSION The presented single-suture tendon graft preparation resisted to smaller failure loads than the conventional three-suture technique. However, no failures in the suture-tendon interface were seen and the failure loads observed were far beyond the tension forces that can be expected intraoperatively. Hence, the single-suture graft preparation technique may be a valuable alternative to the conventional technique.
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Whitaker S, Edwards JH, Guy S, Ingham E, Herbert A. Stratifying the mechanical performance of a decellularized xenogeneic tendon graft for anterior cruciate ligament reconstruction as a function of graft diameter: An animal study. Bone Joint Res 2019; 8:518-525. [PMID: 31832171 PMCID: PMC6888738 DOI: 10.1302/2046-3758.811.bjr-2019-0065.r1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Objectives This study investigated the biomechanical performance of decellularized porcine superflexor tendon (pSFT) grafts of varying diameters when utilized in conjunction with contemporary ACL graft fixation systems. This aimed to produce a range of ‘off-the-shelf’ products with predictable mechanical performance, depending on the individual requirements of the patient. Methods Decellularized pSFTs were prepared to create double-bundle grafts of 7 mm, 8 mm, and 9 mm diameter. Femoral and tibial fixation systems were simulated utilizing Arthrex suspension devices and interference screws in bovine bone, respectively. Dynamic stiffness and creep were measured, followed by ramp to failure from which linear stiffness and load at failure were measured. The mechanisms of failure were also recorded. Results Dynamic stiffness was found to increase with greater graft diameter, with significant differences between all groups. Conversely, dynamic creep reduced with increasing graft diameter with significant differences between the 7 mm and 9 mm groups and the 8 mm and 9 mm groups. Significant differences were also found between the 7 mm, 8 mm, and 9 mm groups for linear stiffness, but no significant differences were found between groups for load at failure. The distribution of failure mechanisms was found to change with graft diameter. Conclusion This study showed that decellularized pSFTs demonstrate comparable biomechanical properties to other ACL graft options and are a potentially viable option for ACL reconstruction. Although grafts can be stratified by their diameter to provide varying biomechanical properties, it may be more appropriate to alter the fixation technique to stratify for a greater diversity of biomechanical requirements. Cite this article: Bone Joint Res 2019;8:518–525.
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Affiliation(s)
| | - Jennifer H Edwards
- Institute of Medical and Biological Engineering, University of Leeds, Leeds, UK
| | - Stephen Guy
- Bradford Teaching Hospitals NHS Foundation Trust, Bradford, UK
| | - Eileen Ingham
- Institute of Medical and Biological Engineering, University of Leeds, Leeds, UK
| | - Anthony Herbert
- Institute of Medical and Biological Engineering, University of Leeds, Leeds, UK
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Patel NA, Choi JH, Wang D. Tibial Fixation Techniques for Soft-Tissue Grafts in Anterior Cruciate Ligament Reconstruction. JBJS Rev 2019; 7:e7. [PMID: 31880625 DOI: 10.2106/jbjs.rvw.19.00047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Nilay A Patel
- Department of Orthopaedic Surgery, University of California Irvine, Orange, California
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Spragg LM, Prentice HA, Morris A, Funahashi TT, Maletis GB, Csintalan RP. Femoral-tibial fixation affects risk of revision and reoperation after anterior cruciate ligament reconstruction using hamstring autograft. Knee Surg Sports Traumatol Arthrosc 2019; 27:3518-3526. [PMID: 30824978 DOI: 10.1007/s00167-019-05431-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Accepted: 02/19/2019] [Indexed: 01/27/2023]
Abstract
PURPOSE Newer fixation devices for hamstring (HS) autograft have been introduced over the years, yet the impact of these devices on ACLR outcomes requiring surgical intervention remains unclear. We sought to evaluate the risk of aseptic revision and reoperation after HS autograft ACLR according to various femoral-tibial fixation methods. METHODS A cohort study was conducted using the Kaiser Permanente ACLR Registry. Primary isolated unilateral ACLR patients who received a HS autograft were identified (2007-2014). Fixation devices were categorized as crosspin, interference, suspensory, or combination (defined as more than one fixation device used on the same side) and femoral-tibial fixation groups used in more than 500 ACLR were evaluated. Cox proportional-hazard regression was used to evaluate the association between femoral-tibial fixation method and outcomes while adjusting for confounders. RESULTS 6,593 primary ACLR were included. Four femoral-tibial fixation groups had more than 500 ACLR: suspensory-interference (n = 3004, 45.6%), interference-interference (n = 1659, 25.2%), suspensory-combination (n = 1103, 16.7%), and crosspin-interference (n = 827, 12.5%). After adjusting for covariates, revision risk was lower for crosspin-interference (HR = 0.43, 95% CI 0.29-0.65) and interference-interference (HR = 0.63, 95% CI 0.41-0.95) methods compared to the suspensory-interference. In contrast, reoperation risk was higher for crosspin-interference (HR = 2.13, 95% CI 1.37-3.32) and suspensory-combination (HR = 1.68, 95% CI 1.04-2.69) methods compared to suspensory-interference. CONCLUSIONS ACLR using HS autograft appears to have the lowest risk of aseptic revision when crosspin or interference fixation is used on the femoral side and is coupled with an interference screw on the tibial side. LEVEL OF EVIDENCE III.
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Affiliation(s)
- Lindsey M Spragg
- Department of Orthopaedics, Southern California Permanente Medical Group, 6670 Alton Pkwy, Irvine, CA, 92618, USA
| | | | - Andrew Morris
- Department of Orthopaedics, University of California Irvine, Irvine, CA, USA
| | - Tadashi T Funahashi
- Department of Orthopaedics, Southern California Permanente Medical Group, 6670 Alton Pkwy, Irvine, CA, 92618, USA
| | - Gregory B Maletis
- Department of Orthopaedics, Southern California Permanente Medical Group, Baldwin Park, CA, USA
| | - Rick P Csintalan
- Department of Orthopaedics, Southern California Permanente Medical Group, 6670 Alton Pkwy, Irvine, CA, 92618, USA.
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Ranjan R, Gaba S, Goel L, Asif N, Kalra M, Kumar R, Kumar A. In vivo comparison of a fixed loop (EndoButton CL) with an adjustable loop (TightRope RT) device for femoral fixation of the graft in ACL reconstruction: A prospective randomized study and a literature review. J Orthop Surg (Hong Kong) 2019; 26:2309499018799787. [PMID: 30235984 DOI: 10.1177/2309499018799787] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
INTRODUCTION There is a lack of in vivo studies comparing the functional outcome and knee stability after anterior cruciate ligament reconstruction (ACLR) using fixed loop (EndoButton (EB) CL) and adjustable loop (TightRope (TR) RT) devices for femoral fixation of soft tissue grafts. MATERIALS AND METHODS Functional outcomes were assessed in terms of the International Knee Documentation Committee (IKDC) and Lysholm scores, knee stability by anteroposterior laxity and side-to-side difference (SSD) using KT-1000 arthrometer. The evaluation was performed preoperatively and post-operatively at 6 months and 2 years. RESULTS Both groups were matched in terms of demographic, preoperative, intraoperative and post-operative covariates. EB ( n = 52) appeared to have better IKDC and Lysholm scores at 6 months post-operative when compared to TR ( n = 50). However, at a final follow-up of 2 years, the results were similar. The anterior tibial translation and SSD were statistically insignificant between the two groups at 6 months and 2 years. CONCLUSION ACLR using EB or TR for femoral fixation gives substantially equivalent functional results and knee stability at mid-term follow-up.
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Affiliation(s)
- Rahul Ranjan
- 1 Lady Hardinge Medical College and Associated Hospitals, New Delhi, India
| | - Sahil Gaba
- 2 All India Institute of Medical Sciences, New Delhi, India
| | - Lakshay Goel
- 1 Lady Hardinge Medical College and Associated Hospitals, New Delhi, India
| | - Naiyer Asif
- 3 J.N. Medical College and Hospital, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Mukesh Kalra
- 1 Lady Hardinge Medical College and Associated Hospitals, New Delhi, India
| | - Ramesh Kumar
- 1 Lady Hardinge Medical College and Associated Hospitals, New Delhi, India
| | - Arvind Kumar
- 2 All India Institute of Medical Sciences, New Delhi, India
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Glasbrenner J, Domnick C, Raschke MJ, Willinghöfer T, Kittl C, Michel P, Wähnert D, Herbort M. Adjustable buttons for ACL graft cortical fixation partially fail with cyclic loading and unloading. Knee Surg Sports Traumatol Arthrosc 2019; 27:2530-2536. [PMID: 30368561 DOI: 10.1007/s00167-018-5262-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 10/23/2018] [Indexed: 01/01/2023]
Abstract
PURPOSE Despite good initial pullout strength, it is unclear whether adjustable button (AB) devices for anterior cruciate ligament (ACL) soft-tissue graft fixation, which are based on the Chinese finger trap technique, resist cyclic loading. Furthermore, they have never been tested in a cyclic protocol including complete unloading. It was hypothesized, that the displacement of AB devices with the Chinese finger trap technique would be greater than that of continuous suture loop devices and other available AB mechanisms in a cyclic loading with complete unloading protocol. METHODS ACL reconstruction was performed in a porcine knee model using three different types of cortical fixation devices: two different AB devices that use the Chinese finger trap design, one AB device that uses a locked suture loop mechanism and two different continuous loop devices as control groups (n = 40). Specimens were mounted in a material-testing machine (Instron Inc.) that permitted 2500 loading and complete unloading cycles to a maximum of 250 N, as well as continuous elongation recording. A one-way ANOVA was performed for statistical analysis. RESULTS The displacement of ABs with a Chinese finger trap loop (mean 8.1; SD 1.5 mm and mean 6.1; SD 1.4 mm) was significantly greater than that of AB with a locked suture loop (mean 4.7; SD 1.0 mm; p < 0.05) and devices with a continuous loop (mean 4.1; SD 0.5 mm and mean 4.4, SD 0.3 mm; p < 0.01). No significant differences were detected between the ABs with a locked suture loop and the continuous loops. CONCLUSION Cyclic loading and unloading of AB using the Chinese finger trap technique leads to significantly greater construct lengthening compared with other devices. Complete unloading of the ACL is very likely to occur during rehabilitation after ACL reconstruction. Lengthening of the AB device due to cyclic loading might be a potential mode of failure of the ACL graft fixation. Therefore, when using an AB femoral fixation technique, a locked suture loop design or a careful rehabilitation protocol should be considered.
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Affiliation(s)
- J Glasbrenner
- Department of Trauma, Hand and Reconstructive Surgery, Westphalian Wilhelms University, Waldeyer Strasse 1, 48149, Muenster, Germany
| | - C Domnick
- Department of Trauma, Hand and Reconstructive Surgery, Westphalian Wilhelms University, Waldeyer Strasse 1, 48149, Muenster, Germany
| | - M J Raschke
- Department of Trauma, Hand and Reconstructive Surgery, Westphalian Wilhelms University, Waldeyer Strasse 1, 48149, Muenster, Germany
| | - T Willinghöfer
- Department of Trauma, Hand and Reconstructive Surgery, Westphalian Wilhelms University, Waldeyer Strasse 1, 48149, Muenster, Germany
| | - C Kittl
- Department of Trauma, Hand and Reconstructive Surgery, Westphalian Wilhelms University, Waldeyer Strasse 1, 48149, Muenster, Germany
| | - P Michel
- Department of Trauma, Hand and Reconstructive Surgery, Westphalian Wilhelms University, Waldeyer Strasse 1, 48149, Muenster, Germany
| | - D Wähnert
- Department of Trauma, Hand and Reconstructive Surgery, Westphalian Wilhelms University, Waldeyer Strasse 1, 48149, Muenster, Germany
| | - Mirco Herbort
- Department of Trauma, Hand and Reconstructive Surgery, Westphalian Wilhelms University, Waldeyer Strasse 1, 48149, Muenster, Germany.
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Anterior cruciate ligament reconstruction is associated with greater tibial tunnel widening when using a bioabsorbable screw compared to an all-inside technique with suspensory fixation. Knee Surg Sports Traumatol Arthrosc 2019; 27:2577-2584. [PMID: 30406408 DOI: 10.1007/s00167-018-5275-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Accepted: 10/29/2018] [Indexed: 12/19/2022]
Abstract
PURPOSE To compare clinical outcomes and tunnel widening following anterior cruciate ligament reconstruction (ACLR) performed with an all-inside technique (Group A) or with a bioabsorbable tibial screw and suspensory femoral fixation (Group B). METHODS Tunnel widening was assessed using computed tomography (CT) and a previously validated analytical best fit cylinder technique at approximately 1-year following ACLR. Clinical follow-up comprised evaluation with IKDC, KSS, Tegner, Lysholm scores, and knee laxity assessment. RESULTS The study population comprised 22 patients in each group with a median clinical follow-up of 24 months (range 21-27 months). The median duration between ACLR and CT was 13 months (range 12-14 months). There were no significant differences in clinical outcome measures between groups. There were no differences between groups with respect to femoral tunnel widening. However, there was a significantly larger increase in tibial tunnel widening, at the middle portion, in Group B (2.4 ± 1.5 mm) compared to Group A (0.8 ± 0.4 mm) (p = 0.027), and also at the articular portion in Group B (1.5 ± 0.8 mm) compared to Group A (0.8 ± 0.8 mm) (p = 0.027). CONCLUSION Tibial tunnel widening after ACLR using hamstring tendon autograft is significantly greater with suspensory femoral fixation and a bioabsorbable tibial interference screw when compared to an all-inside technique at a median follow-up of 2 years. The clinical relevance of this work lies in the rebuttal of concerns arising from biomechanical studies regarding the possibility of increased tunnel widening with an all-inside technique. LEVEL OF EVIDENCE III.
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Onggo JR, Nambiar M, Pai V. Fixed- Versus Adjustable-Loop Devices for Femoral Fixation in Anterior Cruciate Ligament Reconstruction: A Systematic Review. Arthroscopy 2019; 35:2484-2498. [PMID: 31147109 DOI: 10.1016/j.arthro.2019.02.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 02/12/2019] [Accepted: 02/17/2019] [Indexed: 02/02/2023]
Abstract
PURPOSE To compare biomechanical and clinical outcomes between adjustable-loop devices (ALDs) and fixed-loop devices (FLDs) in the femoral fixation component of anterior cruciate ligament reconstruction (ACLR) using a hamstring autograft or allograft. METHODS A multi-database search was performed on July 18, 2018, according to Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines. All articles directly comparing ALDs and FLDs in ACLR using hamstring grafts were included. Non-English-language articles were excluded. RESULTS We included 13 biomechanical, 2 prospective, and 6 retrospective studies in this review. Retensioning of ALDs was performed in 4 of 13 biomechanical studies and in all clinical studies. Biomechanically, 11 studies showed a statistically significantly larger maximum irreversible displacement of the graft in the ALD group. Two studies showed no statistically significant difference with retensioning of the TightRope ALD, whereas all 3 studies that examined knotting of ALDs showed no statistically significant difference between the FLD and ALD groups. Five studies reported statistically significantly higher graft stiffness for FLDs than ALDs. Retensioning or knotting did not produce any significant change in construct stiffness. Nine studies reported a statistically significantly higher ultimate load to failure for FLDs. With knotting of ALDs, this difference was no longer statistically significant in only 1 study. Clinical studies showed no statistically significant differences in clinical, functional, radiologic, and complication outcomes between both groups. CONCLUSIONS Despite the superior biomechanical properties of FLDs, ALDs and FLDs yielded similar clinical outcome scores and graft rerupture rates. Biomechanical outcomes were improved with retensioning of ALDs after tibial fixation, as per manufacturer recommendations. LEVEL OF EVIDENCE Level III, systematic review of Level III and IV studies.
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Blokker AM, Getgood AM, Curiale NJ, Nikolov HN, Laing JG, Holdsworth DW, Burkhart TA. Development and Assessment of a Microcomputed Tomography Compatible Five Degrees-of-Freedom Knee Joint Motion Simulator. J Biomech Eng 2019; 141:2734033. [DOI: 10.1115/1.4043755] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Indexed: 11/08/2022]
Abstract
Currently available knee joint kinematic tracking systems fail to nondestructively capture the subtle variation in joint and soft tissue kinematics that occur in native, injured, and reconstructed joint states. Microcomputed tomography (CT) imaging has the potential as a noninvasive, high-resolution kinematic tracking system, but no dynamic simulators exist to take advantage of this. The purpose of this work was to develop and assess a novel micro-CT compatible knee joint simulator to quantify the knee joint's kinematic and kinetic response to clinically (e.g., pivot shift test) and functionally (e.g., gait) relevant loading. The simulator applies closed-loop, load control over four degrees-of-freedom (DOF) (internal/external rotation, varus/valgus rotation, anterior/posterior translation, and compression/distraction), and static control over a fifth degree-of-freedom (flexion/extension). Simulator accuracy (e.g., load error) and repeatability (e.g., coefficient of variation) were assessed with a cylindrical rubber tubing structure and a human cadaveric knee joint by applying clinically and functionally relevant loads along all active axes. Micro-CT images acquired of the joint at a loaded state were then used to calculate joint kinematics. The simulator loaded both the rubber tubing and the cadaveric specimen to within 0.1% of the load target, with an intertrial coefficient of variation below 0.1% for all clinically relevant loading protocols. The resultant kinematics calculated from the acquired images agreed with previously published values, and produced errors of 1.66 mm, 0.90 mm, 4.41 deg, and 1.60 deg with respect to anterior translation, compression, internal rotation, and valgus rotation, respectively. All images were free of artifacts and showed knee joint displacements in response to clinically and functionally loading with isotropic CT image voxel spacing of 0.15 mm. The results of this study demonstrate that the joint-motion simulator is capable of applying accurate, clinically and functionally relevant loads to cadaveric knee joints, concurrent with micro-CT imaging. Nondestructive tracking of bony landmarks allows for the precise calculation of joint kinematics with less error than traditional optical tracking systems.
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Affiliation(s)
- Alexandra M. Blokker
- Department of Biomedical Engineering, Robarts Research Institute, Western University, London, ON N6A 5B9, Canada
| | - Alan M. Getgood
- Department of Surgery, Fowler Kennedy Sports Medicine Clinic, Western University, London, ON N6A 3K7, Canada
| | - Nathan J. Curiale
- Department of Mechanical Engineering, Western University, London, ON N6A 5B9, Canada
| | - Hristo N. Nikolov
- Robarts Research Institute, Western University, London, ON N6A 5B7, Canada
| | - Justin G. Laing
- Department of Biomedical Engineering, Western University, London, ON N6A 5B9, Canada
| | - David W. Holdsworth
- Professor Department of Medical Biophysics, Western University, London, ON N6A 5C1, Canada
| | - Timothy A. Burkhart
- Department Mechanical Engineering, Lawson Health Research Institute, Western University, 1151 Richmond Road, London, ON N6A 5B9, Canada
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