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Mahatme RJ, Modrak M, Wilhelm C, Lee MS, Owens JS, Gillinov SM, Fong S, Pettinelli N, Islam W, Jimenez AE. Glenohumeral Superior Translation and Subacromial Contract Pressure Are Both Improved With Superior Capsular Reconstruction: A Systematic Review and Meta-analysis of Biomechanical Investigations. Arthroscopy 2024; 40:1279-1287. [PMID: 37634706 DOI: 10.1016/j.arthro.2023.08.025] [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] [Received: 02/16/2023] [Revised: 07/26/2023] [Accepted: 08/18/2023] [Indexed: 08/29/2023]
Abstract
PURPOSE To review cadaveric studies evaluating the biomechanical outcomes of superior capsular reconstruction (SCR) with different graft types for the treatment of irreparable rotator cuff (RTC) tears. METHODS PubMed, Cochrane, and Embase were queried in January 2022 to conduct this meta-analysis using the following key words: "superior capsule reconstruction," "superior capsular reconstruction," and "biomechanics." Articles were included if they reported glenohumeral superior translation or subacromial contact pressure following SCR in cadaveric RTC tears. The review adhered to the Preferred Reporting Items for Systematic Reviews and Meta-analyses criteria. Number of shoulders, graft types, and biomechanical outcomes were recorded and analyzed with forest plots. RESULTS Twelve studies (95 shoulders) were included in the statistical analysis. There was a significant reduction in glenohumeral superior translation following SCR compared with RTC tear across 10 studies (79 shoulders) with standardized mean difference (SMD) -2.48 mm; confidence interval (CI) -3.28 mm, -1.69 mm. The SMD between fascia lata graft and RTC tear was -3.84 mm (CI -4.82 mm, -2.86 mm) and between dermal allograft and RTC tear was -2.05 mm (CI -3.10 mm, -1.00 mm). There was a significant reduction in subacromial contact pressure following SCR compared with RTC tear across 5 studies (55 shoulders) with SMD -3.49 MPa (CI -4.54 MPa, -2.44 MPa). The SMD between fascia lata graft and RTC tear was -3.21 MPa (CI -5.08 MPa, -1.34 MPa) and between dermal allograft and RTC tear was -3.89 MPa (CI -5.91 MPa, -1.87 MPa). CONCLUSIONS Independent of graft type, biomechanical studies suggest that SCR improves glenohumeral superior translation and subacromial contact pressure in comparison with RTC tear at time zero. There was no definitive evidence identified in this study to suggest a biomechanically superior SCR graft option. CLINICAL RELEVANCE Investigating the biomechanical outcomes of several graft types for superior capsular reconstruction will help surgeons better understand the efficacies of different graft types for use in superior capsule reconstruction surgery.
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Affiliation(s)
- Ronak J Mahatme
- University of Connecticut School of Medicine, Farmington, Connecticut, U.S.A
| | - Maxwell Modrak
- Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, Connecticut, U.S.A
| | - Christopher Wilhelm
- Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, Connecticut, U.S.A
| | - Michael S Lee
- Medical College of Wisconsin, Milwaukee, Wisconsin, U.S.A
| | - Jade S Owens
- Keck School of Medicine of USC, Los Angeles, California, U.S.A
| | - Stephen M Gillinov
- Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, Connecticut, U.S.A
| | - Scott Fong
- Case Western Reserve University School of Medicine, Cleveland, Ohio, U.S.A
| | | | - Wasif Islam
- Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, Connecticut, U.S.A
| | - Andrew E Jimenez
- Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, Connecticut, U.S.A..
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Berthold DP, Rupp MC, Obopilwe E, Siebenlist S, Elhassan BT, Mazzocca AD, Muench LN. Anterior Latissimus Dorsi Transfer for Irreparable Subscapularis Tears Improves Shoulder Kinematics in a Dynamic Biomechanical Cadaveric Shoulder Model. Am J Sports Med 2024; 52:624-630. [PMID: 38294257 PMCID: PMC10905977 DOI: 10.1177/03635465231223514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 11/08/2023] [Indexed: 02/01/2024]
Abstract
BACKGROUND In young patients with irreparable subscapularis deficiency (SSC-D) and absence of severe osteoarthritis, anterior latissimus dorsi transfer (aLDT) has been proposed as a treatment option to restore the anteroposterior muscular force couple to regain sufficient shoulder function. However, evidence regarding the biomechanical effect of an aLDT on glenohumeral kinematics remains sparse. PURPOSE/HYPOTHESIS The purpose of this study was to investigate the effects of an aLDT on range of glenohumeral abduction motion, superior migration of the humeral head (SM), and cumulative deltoid force (cDF) in a simulated SSC-D model using a dynamic shoulder model. It was hypothesized that an aLDT would restore native shoulder kinematics by reestablishing the insufficient anteroposterior force couple. STUDY DESIGN Controlled laboratory study. METHODS Eight fresh-frozen cadaveric shoulders were tested using a validated shoulder simulator. Glenohumeral abduction angle (gAA), SM, and cDF were compared across 3 conditions: (1) native, (2) SSC-D, and (3) aLDT. gAA and SM were measured using 3-dimensional motion tracking, while cDF was recorded in real time during dynamic abduction motion by load cells connected to actuators. RESULTS The SSC-D significantly decreased gAA (Δ-9.8°; 95% CI, -14.1° to -5.5°; P < .001) and showed a significant increase in SM (Δ2.0 mm; 95% CI, 0.9 to 3.1 mm; P = .003), while cDF was similar (Δ7.8 N; 95% CI, -9.2 to 24.7 N; P = .586) when compared with the native state. Performing an aLDT resulted in a significantly increased gAA (Δ3.8°; 95% CI, 1.8° to 5.7°; P < .001), while cDF (Δ-36.1 N; 95% CI, -48.7 to -23.7 N; P < .001) was significantly reduced compared with the SSC-D. For the aLDT, no anterior subluxation was observed. However, the aLDT was not able to restore native gAA (Δ-6.1°; 95% CI, -8.9° to -3.2°; P < .001). CONCLUSION In this cadaveric study, performing an aLDT for an irreparable subscapularis insufficiency restored the anteroposterior force couple and prevented superior and anterior humeral head migration, thus improving glenohumeral kinematics. Furthermore, compensatory deltoid forces were reduced by performing an aLDT. CLINICAL RELEVANCE Given the favorable effect of the aLDT on shoulder kinematics in this dynamic shoulder model, performing an aLDT may be considered as a treatment option in patients with irreparable SSC-D.
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Affiliation(s)
- Daniel P. Berthold
- Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), University Hospital, LMU Munich, Munich, Germany
- Department of Sports Orthopaedics, Technical University of Munich, Munich, Germany
| | | | - Elifho Obopilwe
- Department of Orthopaedic Surgery, University of Connecticut, Farmington, Connecticut, USA
| | - Sebastian Siebenlist
- Department of Sports Orthopaedics, Technical University of Munich, Munich, Germany
| | - Bassem T. Elhassan
- Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Augustus D. Mazzocca
- Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Lukas N. Muench
- Department of Sports Orthopaedics, Technical University of Munich, Munich, Germany
- Department of Trauma Surgery, Armed Klinikum München Süd, Munich, Germany
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Funakoshi T, Takahashi T, Murayama T, Miyamoto A, Koga R, Kusano H, Yamamoto Y. Arthroscopic superior capsule reconstruction augmentation using a semitendinosus autograft in massive reparable rotator cuff tears. JSES Int 2024; 8:32-40. [PMID: 38312265 PMCID: PMC10837716 DOI: 10.1016/j.jseint.2023.08.020] [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] [Indexed: 02/06/2024] Open
Abstract
Background Arthroscopic superior capsule reconstruction (SCR) augmentation is a viable treatment option for massive reparable cuff tears. This study aimed to retrospectively compare clinical and imaging outcomes of patients with reparable massive rotator cuff tears after arthroscopic rotator cuff repair (ARCR) with those after SCR augmentation using a semitendinosus autograft. Methods We retrospectively compared 50 patients with massive reparable rotator cuff tears who underwent ARCR and SCR augmentation (n = 25 each). Patients were clinically followed up for at least 2 years, and the American Shoulder and Elbow index, other patient-reported outcomes, active range of motion, and radiography and magnetic resonance imaging findings were assessed. Results At the final follow-up, both patient groups showed significant improvements in forward elevation in range of motion and visual analog scale scores. Improvements in the American Shoulder and Elbow scores in the SCR augmentation group were significantly superior to those in the ARCR group (48.3 and 28.9, P < .01). There was a significant difference in the retear rate between the SCR augmentation group and ARCR group (20% and 56%, respectively; P = .009). Conclusion Our study demonstrated that patient-reported outcomes and retear rates in patients who underwent SCR augmentation with rotator cuff repair for massive rotator cuff tears significantly improved compared with those in patients who underwent ARCR without augmentation. Augmentation with semitendinosus autografting during rotator cuff repair represents a solution for patients with massive reparable rotator cuff tears.
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Affiliation(s)
- Tadanao Funakoshi
- Keiyu Shoulder Surgery Center, Keiyu Orthopaedic Hospital, Tatebayashi, Japan
| | - Toru Takahashi
- Keiyu Shoulder Surgery Center, Keiyu Orthopaedic Hospital, Tatebayashi, Japan
| | - Toshiki Murayama
- Keiyu Shoulder Surgery Center, Keiyu Orthopaedic Hospital, Tatebayashi, Japan
| | - Azusa Miyamoto
- Keiyu Shoulder Surgery Center, Keiyu Orthopaedic Hospital, Tatebayashi, Japan
| | - Ryuji Koga
- Keiyu Shoulder Surgery Center, Keiyu Orthopaedic Hospital, Tatebayashi, Japan
| | - Hiroshi Kusano
- Keiyu Shoulder Surgery Center, Keiyu Orthopaedic Hospital, Tatebayashi, Japan
| | - Yuzuru Yamamoto
- Keiyu Shoulder Surgery Center, Keiyu Orthopaedic Hospital, Tatebayashi, Japan
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Sethi P, Fares MY, Murthi A, Tokish JM, Abboud JA. The long head of the biceps tendon: a valuable tool in shoulder surgery. J Shoulder Elbow Surg 2023; 32:1801-1811. [PMID: 37245621 DOI: 10.1016/j.jse.2023.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 03/28/2023] [Accepted: 04/05/2023] [Indexed: 05/30/2023]
Abstract
ANATOMY AND FUNCTION The long head of the biceps tendon (LHBT) has different properties and characteristics that render it a valuable tool in the hands of shoulder surgeons. Its accessibility, biomechanical strength, regenerative capabilities, and biocompatibility allow it to be a valuable autologous graft for repairing and augmenting ligamentous and muscular structures in the glenohumeral joint. SHOULDER SURGERY APPLICATIONS Numerous applications of the LHBT have been described in the shoulder surgery literature, including augmentation of posterior-superior rotator cuff repair, augmentation of subscapularis peel repair, dynamic anterior stabilization, anterior capsule reconstruction, post-stroke stabilization, and superior capsular reconstruction. Some of these applications have been described meticulously in technical notes and case reports, whereas others may require additional research to confirm clinical benefit and efficacy. CONCLUSION This review examines the role of the LHBT as a source of local autograft, with biological and biomechanical properties, in aiding outcomes of complex primary and revision shoulder surgery procedures.
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Affiliation(s)
- Paul Sethi
- Orthopedic and Neurosurgical Specialists, ONS Foundation, Greenwich, CT, USA
| | - Mohamad Y Fares
- Division of Shoulder and Elbow Surgery, Rothman Orthopaedic Institute, Philadelphia, PA, USA
| | - Anand Murthi
- Department of Orthopaedic Surgery, MedStar Union Memorial Hospital, Baltimore, MD, USA
| | - John M Tokish
- Department of Orthopedic Surgery, Mayo Clinic Arizona, Scottsdale, AZ, USA
| | - Joseph A Abboud
- Division of Shoulder and Elbow Surgery, Rothman Orthopaedic Institute, Philadelphia, PA, USA.
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Park MC. Editorial Commentary: Superior Capsular Reconstructions in Cases of Irreparable Rotator Cuff Tendons Only Partially Restore Anatomy, Yet Significantly Normalize Biomechanics-Without Resorting to Reverse Anatomy. Arthroscopy 2023; 39:1790-1792. [PMID: 37400166 DOI: 10.1016/j.arthro.2023.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 04/04/2023] [Indexed: 07/05/2023]
Abstract
The goal of shoulder superior capsular reconstruction and/or anterior cable reconstructions, at least in terms of biomechanics, is to primarily restore a fulcrum to assist with pain control and functional optimization, with the secondary hope of maintaining cartilage. Fully restoring glenohumeral joint loads with SCR cannot be expected in the setting of persistent tendon insufficiency. Biomechanical studies characterizing shoulder capsular reconstructions have demonstrated anatomic and functional restorations toward normalization when tested with standard biomechanical methods. Glenohumeral abduction, superior humeral head migration, deltoid forces, and glenohumeral contact pressure and area, can be optimized toward the normal intact condition, as measured by motion tracking and pressure mapping in real time, using dynamic actuators. Insofar as restoring normal native anatomy is considered a fundamental priority, with the idea that joint functional longevity is enhanced by preserving anatomy, as surgeons, we should not lose sight of reconstruction over replacement (such as nonanatomic reverse total shoulder arthroplasty) as a favored goal. Anatomy-based reconstructions such as superior capsule or anterior cable reconstruction, may prove over time to be the best primary treatment as knowledge and innovations (technical and medical) develop, with nonanatomic arthroplasty truly being a last resort (yet a clinically viable option when indicated).
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Genter J, Croci E, Ewald H, Müller AM, Mündermann A, Baumgartner D. Ex vivo experimental strategies for assessing unconstrained shoulder biomechanics: A scoping review. Med Eng Phys 2023; 117:104003. [PMID: 37331756 DOI: 10.1016/j.medengphy.2023.104003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 05/22/2023] [Accepted: 05/27/2023] [Indexed: 06/20/2023]
Abstract
BACKGROUND Biomechanical studies of the shoulder often choose an ex vivo approach, especially when investigating the active and passive contribution of individual muscles. Although various simulators of the glenohumeral joint and its muscles have been developed, to date a testing standard has not been established. The objective of this scoping review was to present an overview of methodological and experimental studies describing ex vivo simulators that assess unconstrained, muscular driven shoulder biomechanics. METHODS All studies with ex vivo or mechanical simulation experiments using an unconstrained glenohumeral joint simulator and active components mimicking the muscles were included in this scoping review. Static experiments and humeral motion imposed through an external guide, e.g., a robotic device, were excluded. RESULTS Nine different glenohumeral simulators were identified in 51 studies after the screening process. We identified four control strategies characterized by: (a) using a primary loader to determine the secondary loaders with constant force ratios; (b) using variable muscle force ratios according to electromyography; (c) calibrating the muscle path profile and control each motor according to this profile; or (d) using muscle optimization. CONCLUSION The simulators with the control strategy (b) (n = 1) or (d) (n = 2) appear most promising due to its capability to mimic physiological muscle loads.
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Affiliation(s)
- Jeremy Genter
- IMES Institute of Mechanical Systems, Zurich University of Applied Sciences ZHAW, Winterthur, Switzerland; Department of Biomedical Engineering, University of Basel, Basel, Switzerland; Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland.
| | - Eleonora Croci
- Department of Biomedical Engineering, University of Basel, Basel, Switzerland; Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland
| | - Hannah Ewald
- University Medical Library, University of Basel, Basel, Switzerland
| | - Andreas M Müller
- Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland
| | - Annegret Mündermann
- Department of Biomedical Engineering, University of Basel, Basel, Switzerland; Department of Orthopaedics and Traumatology, University Hospital Basel, Basel, Switzerland; Department of Clinical Research, University of Basel, Basel, Switzerland
| | - Daniel Baumgartner
- IMES Institute of Mechanical Systems, Zurich University of Applied Sciences ZHAW, Winterthur, Switzerland
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Muench LN, Rupp MC, Obopilwe E, Mehl J, Scheiderer B, Siebenlist S, Elhassan BT, Mazzocca AD, Berthold DP. Physiological Tensioning During Lower Trapezius Transfer for Irreparable Posterosuperior Rotator Cuff Tears May Be Important for Improvement in Shoulder Kinematics. Am J Sports Med 2023; 51:2422-2430. [PMID: 37318086 PMCID: PMC10353027 DOI: 10.1177/03635465231179693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 04/28/2023] [Indexed: 06/16/2023]
Abstract
BACKGROUND Lower trapezius transfer (LTT) has been proposed for restoring the anteroposterior muscular force couple in the setting of an irreparable posterosuperior rotator cuff tear (PSRCT). Adequate graft tensioning during surgery may be a factor critical for sufficient restoration of shoulder kinematics and functional improvement. PURPOSE/HYPOTHESIS The purpose was to evaluate the effect of tensioning during LTT on glenohumeral kinematics using a dynamic shoulder model. It was hypothesized that LTT, while maintaining physiological tension on the lower trapezius muscle, would improve glenohumeral kinematics more effectively than undertensioned or overtensioned LTT. STUDY DESIGN Controlled laboratory study. METHODS A total of 10 fresh-frozen cadaveric shoulders were tested using a validated shoulder simulator. Glenohumeral abduction angle, superior migration of the humeral head, and cumulative deltoid force were compared across 5 conditions: (1) native, (2) irreparable PSRCT, (3) LTT with a 12-N load (undertensioned), (4) LTT with a 24-N load (physiologically tensioned according to the cross-sectional area ratio of the lower trapezius muscle), and (5) LTT with a 36-N load (overtensioned). Glenohumeral abduction angle and superior migration of the humeral head were measured using 3-dimensional motion tracking. Cumulative deltoid force was recorded in real time throughout dynamic abduction motion by load cells connected to actuators. RESULTS Physiologically tensioned (Δ13.1°), undertensioned (Δ7.3°), and overtensioned (Δ9.9°) LTT each significantly increased the glenohumeral abduction angle compared with the irreparable PSRCT (P < .001 for all). Physiologically tensioned LTT achieved a significantly greater glenohumeral abduction angle than undertensioned LTT (Δ5.9°; P < .001) or overtensioned LTT (Δ3.2°; P = .038). Superior migration of the humeral head was significantly decreased with LTT compared with the PSRCT, regardless of tensioning. Physiologically tensioned LTT resulted in significantly less superior migration of the humeral head compared with undertensioned LTT (Δ5.3 mm; P = .004). A significant decrease in cumulative deltoid force was only observed with physiologically tensioned LTT compared with the PSRCT (Δ-19.2 N; P = .044). However, compared with the native state, LTT did not completely restore glenohumeral kinematics, regardless of tensioning. CONCLUSION LTT was most effective in improving glenohumeral kinematics after an irreparable PSRCT when maintaining physiological tension on the lower trapezius muscle at time zero. However, LTT did not completely restore native glenohumeral kinematics, regardless of tensioning. CLINICAL RELEVANCE Tensioning during LTT for an irreparable PSRCT may be important to sufficiently improve glenohumeral kinematics and may be an intraoperatively modifiable key variable to ensure postoperative functional success.
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Affiliation(s)
- Lukas N. Muench
- Department of Sports Orthopaedics, Technical University of Munich, Munich, Germany
- Department of Orthopedics & Sports Medicine, University of Connecticut, Farmington, Connecticut, USA
| | | | - Elifho Obopilwe
- Department of Orthopedics & Sports Medicine, University of Connecticut, Farmington, Connecticut, USA
| | - Julian Mehl
- Department of Sports Orthopaedics, Technical University of Munich, Munich, Germany
| | - Bastian Scheiderer
- Department of Sports Orthopaedics, Technical University of Munich, Munich, Germany
| | - Sebastian Siebenlist
- Department of Sports Orthopaedics, Technical University of Munich, Munich, Germany
| | - Bassem T. Elhassan
- Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Augustus D. Mazzocca
- Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Daniel P. Berthold
- Department of Sports Orthopaedics, Technical University of Munich, Munich, Germany
- Department of Orthopedics & Sports Medicine, University of Connecticut, Farmington, Connecticut, USA
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Berthold DP. Editorial Commentary: Shoulder Superior Capsular Reconstruction Remains to Be Proven Superior to Partial Repair of the Rotator Cuff for Active Patients With Irreparable Tears and Without Osteoarthritis. Arthroscopy 2023; 39:716-718. [PMID: 36740294 DOI: 10.1016/j.arthro.2022.11.037] [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] [Received: 11/28/2022] [Accepted: 11/29/2022] [Indexed: 02/07/2023]
Abstract
The management of irreparable rotator cuff tears in active patients without severe osteoarthritis is challenging. Retracted tears of the superior cuff result in devastating glenohumeral kinematics and decreased shoulder function. Surgical solutions such as superior capsular reconstruction (SCR) or tendon transfers may improve shoulder function. Regarding SCR, the superior capsule has been described as a static stabilizer allowing for the centering of the humeral head. However, some bases for SCR are based on biomechanical studies that should be regarded as time zero, absent healing, and generally oversimplified as ball-and-socket research rather than replicating complex functional shoulder kinematics. SCR may be waning in popularity. SCR using autograft may, or may not, prove effective in the long run. For now, it remains to be seen whether SCR is superior to partial repair of the rotator cuff.
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Zhao X, Jia J, Wen L, Zhang B. Biomechanical outcomes of superior capsular reconstruction for irreparable rotator cuff tears by different graft materials-a systematic review and meta-analysis. Front Surg 2023; 9:939096. [PMID: 36700024 PMCID: PMC9869421 DOI: 10.3389/fsurg.2022.939096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 12/14/2022] [Indexed: 01/11/2023] Open
Abstract
Background Irreparable rotator cuff tears (IRCT) are defined as defects that cannot be repaired due to tendon retraction, fat infiltration, or muscle atrophy. One surgical remedy for IRCT is superior capsular reconstruction (SCR), which fixes graft materials between the larger tuberosity and the superior glenoid. Patients and methods The Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) criteria were followed for conducting the systematic review and meta-analysis. From their inception until February 25, 2022, Pubmed, Embase, and Cochrane Library's electronic databases were searched. Studies using cadavers on SCR for IRCT were also included. The humeral head's superior translation and subacromial peak contact pressure were the primary outcomes. The humeral head's anteroposterior translation, the kind of graft material used, its size, and the deltoid load were the secondary outcomes. Results After eliminating duplicates from the search results, 1,443 unique articles remained, and 20 papers were finally included in the quantitative research. In 14 investigations, the enhanced superior translation of the humeral head was documented in IRCTs. In 13 studies, a considerable improvement following SCR was found, especially when using fascia lata (FL), which could achieve more translation restraints than human dermal allograft (HDA) and long head of bicep tendon (LHBT). Six investigations reported a subacromial peak contact pressure increase in IRCTs, which could be rectified by SCR, and these studies found a substantial increase in this pressure. The results of the reduction in subacromial peak contact pressure remained consistent regardless of the graft material utilized for SCR. While there was a statistically significant difference in the change of graft material length between FL and HDA, the change in graft material thickness between FL and HDA was not significant. The humeral head's anterior-posterior translation was rising in IRCTs and could be returned to its original state with SCR. In five investigations, IRCTs caused a significant increase in deltoid force. Furthermore, only one study showed that SCR significantly decreased deltoid force. Conclusion With IRCT, SCR might significantly decrease the glenohumeral joint's superior and anterior-posterior stability. Despite the risks for donor-site morbidity and the longer recovery time, FL is still the best current option for SCR.
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Muench LN, Berthold DP, Kia C, Obopilwe E, Cote MP, Imhoff AB, Scheiderer B, Elhassan BT, Beitzel K, Mazzocca AD. Biomechanical comparison of lower trapezius and latissimus dorsi transfer for irreparable posterosuperior rotator cuff tears using a dynamic shoulder model. J Shoulder Elbow Surg 2022; 31:2392-2401. [PMID: 35671930 DOI: 10.1016/j.jse.2022.05.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 05/02/2022] [Accepted: 05/07/2022] [Indexed: 02/01/2023]
Abstract
BACKGROUND In the setting of irreparable posterosuperior rotator cuff tears (PSRCTs), lower trapezius transfer (LTT) may be anatomically better positioned for restoring the muscular force couple compared with latissimus dorsi transfer (LDT). The purpose of the study was to evaluate the effect of LTT and LDT on glenohumeral kinematics using a dynamic shoulder model. METHODS Ten fresh-frozen cadaveric shoulders (mean age: 56.5 ± 17.2 years) were tested using a dynamic shoulder simulator. The maximum abduction angle (MAA), superior humeral head migration (SHM), and cumulative deltoid forces (CDFs) were compared across 4 conditions: (1) native; (2) irreparable PSRCT; (3) LTT using an Achilles tendon allograft; and (4) LDT. MAA and SHM were measured using 3-dimensional motion tracking. CDF was recorded in real time throughout the dynamic abduction motion by load cells connected to actuators. RESULTS Compared to the native state, the PSRCT resulted in a significant decrease (Δ-24.1°; P < .001) in MAA, with a subsequent significant increase after LTT (Δ13.1°; P < .001) and LDT (Δ8.9°; P < .001). LTT achieved a significantly greater MAA than LDT (Δ4.2°; P = .004). Regarding SHM, both LTT (Δ-9.4 mm; P < .001) and LDT (Δ-5.0 mm; P = .008) demonstrated a significant decrease compared with the PSRCT state. LTT also achieved significantly less SHM compared with the LDT (Δ-4.4 mm; P = .011). Further, only the LTT resulted in a significant decrease in CDF compared with the PSRCT state (Δ-21.3 N; P = .048), whereas LTT and LDT showed similar CDF (Δ-11.3 N; P = .346). However, no technique was able to restore the MAA, SHM, and CDF of the native shoulder (P < .001, respectively). CONCLUSION LTT and LDT both achieved a significant increase in MAA along with significantly less SHM compared with the PSRCT state. Although LTT required significantly less compensatory deltoid forces compared with the PSRCT state, this was not observed for the LDT. Further, the LTT prevented loss of abduction motion and SHM more sufficiently. In the challenging treatment of irreparable PSRCTs, LTT may restore native glenohumeral kinematics more sufficiently, potentially leading to improved postoperative functional outcomes.
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Affiliation(s)
- Lukas N Muench
- Department of Orthopaedic Sports Medicine, Technical University of Munich, Munich, Germany; Department of Orthopaedic Surgery, University of Connecticut, Farmington, CT, USA.
| | - Daniel P Berthold
- Department of Orthopaedic Sports Medicine, Technical University of Munich, Munich, Germany; Department of Orthopaedic Surgery, University of Connecticut, Farmington, CT, USA
| | - Cameron Kia
- Department of Orthopaedic Surgery, University of Connecticut, Farmington, CT, USA
| | - Elifho Obopilwe
- Department of Orthopaedic Surgery, University of Connecticut, Farmington, CT, USA
| | - Mark P Cote
- Department of Orthopaedic Surgery, University of Connecticut, Farmington, CT, USA
| | - Andreas B Imhoff
- Department of Orthopaedic Sports Medicine, Technical University of Munich, Munich, Germany
| | - Bastian Scheiderer
- Department of Orthopaedic Sports Medicine, Technical University of Munich, Munich, Germany
| | - Bassem T Elhassan
- Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, MA, USA
| | - Knut Beitzel
- Department of Orthopaedic Sports Medicine, Technical University of Munich, Munich, Germany; Department of Shoulder Surgery, ATOS Clinic, Cologne, Germany
| | - Augustus D Mazzocca
- Department of Orthopaedic Surgery, University of Connecticut, Farmington, CT, USA
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11
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Berthold DP, Ravenscroft M, Bell R, Obopilwe E, Cote MP, Kane Z, Morgan BW, Mühlenfeld N, Mazzocca AD, Muench LN. Bursal Acromial Reconstruction (BAR) Using an Acellular Dermal Allograft for Massive, Irreparable Posterosuperior Rotator Cuff Tears: A Dynamic Biomechanical Investigation. Arthroscopy 2022; 38:297-306.e2. [PMID: 34329702 DOI: 10.1016/j.arthro.2021.07.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 07/13/2021] [Accepted: 07/15/2021] [Indexed: 02/02/2023]
Abstract
PURPOSE To investigate the effect of bursal acromial reconstruction (BAR) using an acellular dermal allograft on glenohumeral joint kinematics including maximum abduction angle, glenohumeral superior translation, cumulative deltoid force, and subacromial contact pressure. METHODS In this dynamic biomechanical cadaveric shoulder study, 8 fresh-frozen cadaveric shoulders (age 53.4 ± 14.2 years, mean ± standard deviation) were tested using a dynamic shoulder testing system. Maximum abduction angle (MAA), glenohumeral superior translation (ghST), maximum cumulative deltoid force (cDF), and subacromial peak contact pressure (sCP) were compared across 3 conditions: (1) intact shoulder; (2) massive retracted irreparable posterosuperior rotator cuff tear (psRCT) according to Patte III; and (3) BAR. Additionally, humeral head containment was measured using contact pressure. RESULTS Compared with the simulated psRCT, BAR significantly increased mean MAA and significantly decreased ghST (P < .001, respectively) and cDF (P = .017) Additionally, BAR was found to significantly decrease sCP compared with psRCT (P = .024). CONCLUSION In a dynamic biomechanical cadaveric shoulder simulator, resurfacing the undersurface of the acromion using the BAR technique leads to significantly improved ghST, MAA, cDF, and sCP compared with the irreparable rotator cuff tear. CLINICAL RELEVANCE With the BAR technique, native humeral containment may be restored, which can potentially delay progressive subacromial and glenoidal abrasive wear and improve overall shoulder function. As such, the proposed BAR technique can be considered as a technically feasible and potentially cost- and timesaving procedure, as no bone anchors are needed, glenoidal or humeral side graft ruptures can be avoided, and postoperative rehabilitation can be started immediately. However, future clinical studies are needed.
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Affiliation(s)
- Daniel P Berthold
- Department of Orthopaedic Sports Medicine, Technical University of Munich, Munich, Germany; Department of Orthopaedic Surgery, University of Connecticut, Farmington, Connecticut, U.S.A..
| | | | | | - Elifho Obopilwe
- Department of Orthopaedic Surgery, University of Connecticut, Farmington, Connecticut, U.S.A
| | - Mark P Cote
- Department of Orthopaedic Surgery, University of Connecticut, Farmington, Connecticut, U.S.A
| | - Zenon Kane
- Department of Orthopaedic Surgery, University of Connecticut, Farmington, Connecticut, U.S.A
| | | | - Nils Mühlenfeld
- Department of Trauma, Hand and Reconstructive Surgery, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Augustus D Mazzocca
- Department of Orthopaedic Surgery, University of Connecticut, Farmington, Connecticut, U.S.A
| | - Lukas N Muench
- Department of Orthopaedic Sports Medicine, Technical University of Munich, Munich, Germany; Orthoteam Centre, Manchester, UK
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12
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The choice of an optimal graft for the superior capsule reconstruction of the shoulder with a massive rotator cuff tear. КЛИНИЧЕСКАЯ ПРАКТИКА 2021. [DOI: 10.17816/clinpract76045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Background: The study hypothesis is that the knowledge about the mechanical properties of biological tissues will help surgeons to choose a transplant.
Aim: To determine the optimal type of a graft, based on the assessment of the mechanical properties of three types of grafts used for the superior capsule reconstruction of the shoulder joint with a massive rotator cuff tear.
Methods: In the experimental work, 3 types of biological tissues were studied: allografts of the fascia lata and of the dura mater, and the DX Reinforcement Matrix (a dermal ECM xenograft). The experiment was divided into two parts. In the first part, the mechanical strength at rupture of the samples was evaluated and compared, in the second part the resistance of a vertical suture was studied. The tests included uniaxial stretching with the force and strain at rupture recorded.
Results: The fascia lata allograft showed the highest ultimate tensile strength, while the dura mater allograft had the lowest ultimate tensile strength. All the three materials showed rather high values of the rupture strain. The lowest value of the rupture strain was detected for the dura mater allograft 15.22.6%, the highest value was obtained for the dermal ECM xenograft 63.320.8%. The largest value of the fracture stress was recorded for the DX Reinforcement Matrix 33.5 N. The minimum value was recorded for the fascia lata allograft 9.9 N.
Conclusion: The fascia lata allograft and DX Reinforcement Matrix have the optimal mechanical characteristics and can be recommended as grafts for the superior capsule reconstruction of the shoulder joint with a massive rotator cuff tear.
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