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Thiel GE, Puga TB, Perleberg TD, Figuerres BF, Dennis JF. Achilles Allograft Fiber Track Graft Preparation Technique for Anterior Cruciate Ligament Reconstruction. Arthrosc Tech 2024; 13:102844. [PMID: 38435240 PMCID: PMC10907893 DOI: 10.1016/j.eats.2023.09.019] [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: 07/23/2023] [Accepted: 09/20/2023] [Indexed: 03/05/2024] Open
Abstract
Anterior cruciate ligament rupture is a common orthopaedic injury, with reconstruction the treatment of choice for active individuals. Graft selection is an important consideration for surgical planning. Achilles tendon allograft is a graft choice most likely used in cases of revision anterior cruciate ligament reconstruction. This technical note discusses an approach to Achilles tendon allograft preparation that respects and follows the rotation of the fibers of the Achilles tendon. Key considerations in the use of this technique include (1) identifying the rotational fiber tracks, (2) performing careful dissection along the identified tracks of the fibers, and (3) ensuring an appropriate graft width based on patient size, all of which are crucial for the success of this unique technique. The preservation of the rotational fibers provided by this technique may have the potential to result in increased tensile strength and better clinical outcomes.
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Affiliation(s)
- Grace E. Thiel
- College of Osteopathic Medicine, Kansas City University, Kansas City, Missouri, U.S.A
| | - Troy B. Puga
- College of Osteopathic Medicine, Kansas City University, Kansas City, Missouri, U.S.A
| | - Tyler D. Perleberg
- College of Osteopathic Medicine, Kansas City University, Kansas City, Missouri, U.S.A
| | - Benedict F. Figuerres
- Department of Orthopedics and Sports Medicine, The University of Kansas Health System St. Francis Campus, Topeka, Kansas, U.S.A
| | - Jennifer F. Dennis
- Department of Pathology and Anatomical Sciences, Kansas City University, Kansas City, Missouri, U.S.A
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Lim S, Park KH, Park DY, Kim TH, Koh JH, Chung JY. Rotational stability can be enhanced in revision anterior cruciate ligament reconstruction using the over-the-top augmentation technique compared to single bundle technique. BMC Sports Sci Med Rehabil 2023; 15:111. [PMID: 37715268 PMCID: PMC10504798 DOI: 10.1186/s13102-023-00724-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 09/05/2023] [Indexed: 09/17/2023]
Abstract
PURPOSE Revision anterior cruciate ligament (ACL) reconstruction is technically challenging due to mispositioned tunnels, bone loss, and tunnel enlargement, which may compromise graft fixation and result in failure. To obtain firm graft fixation and strength in one stage, we utilized an over-the-top augmentation technique using an Achilles tendon allograft in revision ACL reconstruction (OA-ACLR). This study compared OA-ACLR with single-bundle ACL reconstruction (SB-ACLR). We hypothesized that OA-ACLR would enhance the postoperative knee joint rotational stability. METHODS We retrospectively analyzed 47 patients who underwent revisional OA-ACLR and 48 who underwent primary SB-ACLR with minimum follow-up of 6 months. Knee instability was evaluated with the anterior drawer, Lachman, and pivot shift tests preoperatively and at the final follow-up. Side-to-side differences were compared with the non-affected side at the final follow-up. Function was evaluated using the IKDC subjective and Lysholm knee scores preoperatively and at the final follow-up. RESULTS The groups did not differ in terms of sex, age, BMI, and etiology. There were no significant differences in concomitant surgical procedures, such as meniscectomy and meniscus repair, between the two groups (p = 0.335, > 0.99). Both groups significantly improved in the anterior drawer, Lachman, pivot shift tests, and IKDC and Lysholm knee scores after surgery (all p < 0.001). The OA-ACLR group showed significantly higher rotational stability in the pivot shift test than the SB-ACLR group (p = 0.017). The postoperative side-to-side difference, the IKDC and Lysholm scores showed no significant differences between the groups (p = 0.34, 0.301, 0.438). CONCLUSIONS OA-ACLR showed enhanced rotational stability with pivot shift test compared to SB-ACLR. It may be considered a useful alternative for revision ACL reconstruction.
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Affiliation(s)
- Sumin Lim
- Department of Orthopedic Surgery, Ajou University School of Medicine, 164 Worldcup-ro, Yongtong-gu, Suwon, 16499, Korea
| | - Ki-Hoon Park
- Department of Orthopedic Surgery, Ajou University School of Medicine, 164 Worldcup-ro, Yongtong-gu, Suwon, 16499, Korea
- Daprtment of Orthopedic Surgery, Armed Forces Yangju Medical Center, Yangju-si, Korea
| | - Do Young Park
- Department of Orthopedic Surgery, Ajou University School of Medicine, 164 Worldcup-ro, Yongtong-gu, Suwon, 16499, Korea
- Cell Therapy Center, Ajou University Medical Center, Suwon, Korea
| | - Tae Hun Kim
- Department of Orthopedic Surgery, Ajou University School of Medicine, 164 Worldcup-ro, Yongtong-gu, Suwon, 16499, Korea
| | - Jeong-Hyun Koh
- Department of Orthopedic Surgery, Ajou University School of Medicine, 164 Worldcup-ro, Yongtong-gu, Suwon, 16499, Korea
| | - Jun Young Chung
- Department of Orthopedic Surgery, Ajou University School of Medicine, 164 Worldcup-ro, Yongtong-gu, Suwon, 16499, Korea.
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Pinheiro VH, Jones M, Borque KA, Balendra G, White NP, Ball SV, Williams A. Rates and Levels of Elite Sport Participation at 5 Years After Revision ACL Reconstruction. Am J Sports Med 2022; 50:3762-3769. [PMID: 36326297 DOI: 10.1177/03635465221127297] [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: 11/06/2022]
Abstract
BACKGROUND There is a paucity of data regarding return to play (RTP), level of competition, and longevity of play after revision of anterior cruciate ligament (ACL) reconstruction (ACLR) in elite athletes. PURPOSE To report RTP rates and competition levels in elite athletes at the point of RTP, as well as at 2 and 5 years after revision ACLR, and the effect of meniscal and chondral pathology at revision surgery on these outcomes. STUDY DESIGN Case series; Level of evidence, 4. METHODS A retrospective review of a consecutive series of all revision ACLRs undertaken by the senior author between 2009 and 2019, with a minimum 2-year follow-up, was carried out. Outcome measures were RTP rates and competition level. RESULTS A total of 49 knees in 48 elite athletes met the inclusion criteria. After revision ACLR, 43 (87.8%) elite athletes achieved RTP, of whom 75.5% were at the same level. At 2 years after surgery, 39 (79.6%) were still playing, 25 (51%) at the same level; at 5 years after surgery, 20 (44.4%) were still playing, 9 (20%) at the same level. Elite athletes with <50% thickness or no articular cartilage lesions were more likely to RTP (94.6% vs 66.7%; P = .026), as well as return to the same competition level (83.8% vs 50%; P = .047), compared with those with ≥50% thickness chondral lesions. Those without medial meniscal pathology were more likely to RTP at the same level after revision surgery (94.4% vs 64.5%; P = .036). The median time elite athletes continued to play after revision ACLR was 73 months (95% CI, 43.4-102.6); 23 months at the same level (95% CI, 13.6-32.4). The probability of still playing at 5 years after surgery was 55.9%, with a 22.5% chance of maintaining preinjury competition level. CONCLUSION In elite athletes, RTP rates and competition level decreased over time after revision ACLR. The presence of >50% thickness chondral pathology was associated with lower RTP rates and competition level at RTP time, while medial meniscal pathology was associated with lower competition level at RTP.
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Affiliation(s)
| | - Mary Jones
- Fortius Clinic, London UK, FIFA Medical Centre of Excellence, London, UK
| | - Kyle A Borque
- Houston Methodist Orthopedics and Sports Medicine, Houston, Texas, USA
| | - Ganesh Balendra
- Fortius Clinic, London UK, FIFA Medical Centre of Excellence, London, UK
| | - Nathan P White
- Park Clinic Orthopaedics, Melbourne Knee Centre, Melbourne, Australia
| | - Simon V Ball
- Fortius Clinic, London UK, FIFA Medical Centre of Excellence, London, UK.,Chelsea and Westminster Hospital NHS Foundation Trust, London, UK
| | - Andy Williams
- Fortius Clinic, London UK, FIFA Medical Centre of Excellence, London, UK
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[Research progress of anterior cruciate ligament reconstruction with over-the-top technique]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2022; 36:1166-1171. [PMID: 36111481 PMCID: PMC9626294 DOI: 10.7507/1002-1892.202203097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
OBJECTIVE To review the research progress regarding the over-the-top technique for anterior cruciate ligament (ACL) reconstruction. METHODS The relevant literature on ACL reconstruction using the over-the-top technique was analyzed for its evolution, clinical application, advantages, and limitations. RESULTS Over-the-top technique for ACL reconstruction is a combined intra- and extra-articular technique. Because it avoids drilling the femoral tunnel, its advantages are mainly highlighted in the protection of the femur. Therefore, it is widely used in children and adolescents with epiphyseal occlusion and in patients with revision reconstruction. In addition, significant improvements in postoperative joint stability, functional scores, and return to exercise rates are found in long-term follow-up studies of patients with primary ACL reconstruction and combined anterolateral tenodesis. However, the technique also has some limitations, such as poor stability of knee flexion after operation, high requirement for graft length, and easy impact of graft in the intercondylar fossa. CONCLUSION The current research results show the effectiveness and safety of the over-the-top technique for primary and revision ACL reconstruction, with the advantages of wide application, simple operation, and quick recovery; however, more researches are needed to further optimize the selection of grafts and femoral condyle management problems, and to clarify the long-term effectiveness.
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Cohen D, Yao PF, Uddandam A, de SA D, Arakgi ME. Etiology of Failed Anterior Cruciate Ligament Reconstruction: a Scoping Review. Curr Rev Musculoskelet Med 2022; 15:394-401. [DOI: 10.1007/s12178-022-09776-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/21/2022] [Indexed: 10/17/2022]
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Achilles Tendon Allograft Preparation Technique for Anterior Cruciate Ligament Reconstruction: A Technical Note. Arthrosc Tech 2021; 10:e2143-e2150. [PMID: 34504754 PMCID: PMC8417340 DOI: 10.1016/j.eats.2021.05.016] [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: 03/19/2021] [Accepted: 05/18/2021] [Indexed: 02/03/2023] Open
Abstract
Several factors associated with graft preparation for the surgery of the anterior cruciate ligament (ACL) like the wrong thawed, prophylaxis, bone cuts, excessive bone removal as well as positioning problems like a tunnels-graft mismatch, insufficient harvesting of the donor's tendon, size graft limitations (length and diameter), uncontrolled rotation of graft in their longitudinal axis, over or under tensioned graft, fixation mistakes, bone defects, secondary arthrofibrosis or morbidity of the donor site, and others factors importantly affect the outcomes of the ACL surgery. In this sense, the Achilles tendon Allograft is an advantageous technique where many of the previous limitation factors described can be controlled during an appropriate preparation. However, to obtain the maximum potentialities of the graft a detailed knowledge of the preparation is required. Hence, we aimed to describe how to prepare the Achilles tendon Allograft to control the graft's length and diameter, bone removal, and fixation requirements.
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Ventura A, Legnani C, Boisio F, Borgo E, Peretti GM. The association of extra-articular tenodesis restores rotational stability more effectively compared to contralateral hamstring tendon autografts ACL reconstruction alone in patients undergoing ACL revision surgery. Orthop Traumatol Surg Res 2021; 107:102739. [PMID: 33390331 DOI: 10.1016/j.otsr.2020.06.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/27/2020] [Accepted: 06/22/2020] [Indexed: 02/03/2023]
Abstract
BACKGROUND Recent years have seen a resurgence of interest about lateral extra-articular procedures performed in association with anterior cruciate ligament (ACL) surgery, as they can reduce the positivity to pivot shift test by acting on rotational instability. The purpose of the present study is to compare the postoperative functional outcomes of ACL revision surgery using contralateral hamstring tendon autografts with or without extra-articular tenodesis. HYPOTHESIS The hypothesis is that combined extra-articular tenodesis gives better rotational stability following revision ACL surgery. PATIENTS AND METHODS Twenty-four patients who underwent ACL revision surgery were retrospectively reviewed at an average follow-up of 4.5 years; 12 underwent contralateral hamstring tendon autografts reconstruction (group A) while in 12 extra-articular tenodesis was associated (group B). Assessment included Lysholm score, International Knee Documentation Committee (IKDC) Subjective Knee Form, Tegner activity level and objective evaluation (range of motion, Lachman test, pivot-shift test and KT-1000 instrumented laxity testing). RESULTS Follow-up examination showed that there were no statistically significant differences in Lysholm, IKDC and Tegner scores between the groups (p=n.s.). Similarly, no differences concerning anterior tibial translation as measured with KT-1000 arthrometer were reported between the groups (p=n.s.); the percentage of positivity to pivot shift test was significantly higher in patients in group A (p<0.05). CONCLUSIONS The association of extra-articular tenodesis restores rotational stability more effectively compared to contralateral hamstring tendon autografts ACL revision surgery alone. LEVEL OF EVIDENCE III.
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Affiliation(s)
- Alberto Ventura
- IRCCS Istituto Ortopedico Galeazzi, Sports Traumatology and Minimally Invasive Articular Surgery Center, Milan, Italy
| | - Claudio Legnani
- IRCCS Istituto Ortopedico Galeazzi, Sports Traumatology and Minimally Invasive Articular Surgery Center, Milan, Italy.
| | | | - Enrico Borgo
- IRCCS Istituto Ortopedico Galeazzi, Sports Traumatology and Minimally Invasive Articular Surgery Center, Milan, Italy
| | - Giuseppe M Peretti
- IRCCS Istituto Ortopedico Galeazzi, Milan, Italy; Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
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Mayr HO, Prall WC. Editorial Commentary: Revision of Failed Double-Bundle Anterior Cruciate Ligament Reconstruction. Arthroscopy 2020; 36:556-557. [PMID: 32014184 DOI: 10.1016/j.arthro.2019.11.094] [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: 11/09/2019] [Accepted: 11/12/2019] [Indexed: 02/02/2023]
Abstract
Double-bundle (DB) reconstruction of the anterior cruciate ligament was favored for several years. However, recent studies increasingly show that this technique does not provide a clear advantage over the less-invasive single-bundle technique. Unfortunately, the graft fails relatively often after ACL reconstruction. Postoperative communication of the bone tunnels through bone tunnel widening is possible. Since 2 drill channels are created in the DB technique, femoral as well as tibial, it is assumed that this technique may cause problems during revision. So, in part, revision may require a 2-step procedure with bone graft filling of the tunnels as the first step. It is important that surgeons with experience using DB publish their revision strategies and experiences.
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Xu M, Zhang H, Yang X, Wang F, Yang L, Zhang H, Hu Y. The influence of donor and recipient characteristics on allograft tendons: a systematic review. Cell Tissue Bank 2020; 21:17-29. [PMID: 31897977 DOI: 10.1007/s10561-019-09803-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 12/09/2019] [Indexed: 11/26/2022]
Abstract
Tendon allograft has been an important alternative graft option aside from autograft. The outcome of reconstruction surgery is determined by donor and recipient related factors. The purpose of this article was to identified all studies reporting donor and recipient characteristics, including the age and gender of donors, along with the age, gender, activity level and smoking status of recipients, that affect the biomechanical properties and post-transplantation outcomes of allograft tendons. The systematic study search was based on MEDLINE via PubMed, Embase and the Cochrane Library databases. The reference lists of the included studies were used for hand searching (snowballing). The searching process was performed by two independent investigators, using search MESH term: "tendon", "allograft", and "person". Studies evaluating the influence of donor and recipient biological characteristics on the mechanical property and transplantation outcome of allograft were included. A total of 12 studies were selected for qualitative synthesis, including 6 studies evaluated the influence of donor characteristics, including age and gender, on the mechanical strength of tendon allograft. 6 studies assessed the influence of recipient characteristics, including age, gender, smoking status, and activity level, on the clinical outcome. As a conclusion, tendon allografts from donor younger than 40 years old were expected to have a higher mechanical property. Young patients or patients with a high level of activity were not recommended to receive allograft tendon when autograft is optional. There is no strong evidence supporting that neither donor or recipient gender affects the tendon allograft transplantation outcomes. Smoking history could increase the risk of complications.
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Affiliation(s)
- Mingyou Xu
- Graduate School, Tianjin Medical University, Tianjin, 300070, China
| | - Haoran Zhang
- Graduate School, Tianjin Medical University, Tianjin, 300070, China
| | - Xionggang Yang
- Graduate School, Tianjin Medical University, Tianjin, 300070, China
| | - Feng Wang
- Graduate School, Tianjin Medical University, Tianjin, 300070, China
| | - Li Yang
- Graduate School, Tianjin Medical University, Tianjin, 300070, China
| | - Hao Zhang
- Graduate School, Tianjin Medical University, Tianjin, 300070, China
| | - Yongcheng Hu
- Department of Orthopedic Oncology, Tianjin Hospital, Tianjin, 300211, China.
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Editorial Commentary: Bone Tunnel Grafting for Two-Stage Anterior Cruciate Ligament Revision and the Meaning of Life for an Arthroscopic Surgeon. Arthroscopy 2020; 36:186-188. [PMID: 31864575 DOI: 10.1016/j.arthro.2019.09.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 09/18/2019] [Indexed: 02/02/2023]
Abstract
Accurate bone tunnel filling in a 2-staged anterior cruciate ligament revision is indubitably fundamental for a successful outcome. Bone autograft is commonly employed and it is usually harvested from the iliac crest: this requires longer surgical time, and donor-site morbidity following bone harvest is a well-known problem. Therefore, strategies to minimize or abolish it have been attempted: the use of allografts may seem promising, but their use is associated with high costs and strict regulatory limitations. Bony substitutes instead represent a new and potentially effective solution: they could help surgeons to fill bone tunnels in an easier and faster way that elicits satisfactory lamellar bone formation within the tunnels, and their use is associated with fewer postoperative complications, such as pain and local hematoma. Evidence from literature suggests that this approach could provide significant advantages over traditional autograft harvesting, with comparable outcomes in terms of bone formation and integration, allowing a correct tunnel placement during revision surgery.
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Glogovac G, Schumaier AP, Grawe BM. Return to Sport Following Revision Anterior Cruciate Ligament Reconstruction in Athletes: A Systematic Review. Arthroscopy 2019; 35:2222-2230. [PMID: 31272644 DOI: 10.1016/j.arthro.2019.01.045] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 01/22/2019] [Accepted: 01/28/2019] [Indexed: 02/02/2023]
Abstract
PURPOSE To report the rate of return to sport following revision anterior cruciate ligament (ACL) reconstruction in athletes. METHODS A systematic review of the literature following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines was conducted for athletes undergoing revision ACL reconstruction at a minimum 1-year follow-up. The primary outcome measure was return to sport following revision ACL reconstruction. Secondary outcomes were International Knee Documentation Committee score, Knee Injury and Osteoarthritis Outcome Score, Tegner and Lysholm scores, KT-1000 arthrometer measurements, and rates of ACL rerupture. A subjective analysis was performed, and data were summarized using forest plots, ranges, and tables. RESULTS Thirteen studies met the inclusion criteria. The rate of return to sport at any level ranged from 56% to 100%. The rate of return to sport at preinjury level ranged from 13% to 69%. The average time to return to sport ranged from 6.7 to 12 months. The average patient-reported outcome scores ranged from 43% to 86% (International Knee Documentation Committee score), 45% to 95% (Knee Injury and Osteoarthritis Outcome Score), 4.3 to 9 (Tegner), and 84% to 91% (Lysholm). KT-1000 arthrometer measurements ranged from 1.2 to 3.1 mm. Rates of ACL rerupture ranged from 0% to 20%. CONCLUSIONS This systematic review demonstrated a relatively high rate of return to sport at any level in patients who underwent revision ACL reconstruction, but a relatively low rate of return to sport at preinjury level of play. Patient-reported outcomes were favorable, showing improvement at follow-up from preoperative scores. Rates of ACL rerupture were high relative to those reported for primary ACL reconstruction. This study suggests that athletes may have difficulty resuming their previous level of sport following revision ACL reconstruction but have a good chance of returning to a lower level of play. LEVEL OF EVIDENCE Level IV, systematic review of Level II-IV studies.
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Affiliation(s)
- Georgina Glogovac
- University of Cincinnati, Department of Orthopaedics and Sports Medicine, Cincinnati, Ohio, U.S.A..
| | - Adam P Schumaier
- University of Cincinnati, Department of Orthopaedics and Sports Medicine, Cincinnati, Ohio, U.S.A
| | - Brian M Grawe
- University of Cincinnati, Department of Orthopaedics and Sports Medicine, Cincinnati, Ohio, U.S.A
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Bisciotti GN, Chamari K, Cena E, Bisciotti A, Bisciotti A, Corsini A, Volpi P. Anterior cruciate ligament injury risk factors in football. J Sports Med Phys Fitness 2019; 59:1724-1738. [PMID: 31062538 DOI: 10.23736/s0022-4707.19.09563-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
INTRODUCTION Anterior cruciate ligament (ACL) lesion represents one of the most dramatic injuries in a football (soccer) player's career. There are many injury risk factors related to intrinsic (non-modifiable) and/or extrinsic (modifiable) factors of ACL injury. EVIDENCE ACQUISITION Research of the studies was conducted until September 2018 without publication data limitation or language restriction on the following databases: PubMed/MEDLINE, Scopus, ISI, EXCERPTA. EVIDENCE SYNTHESIS To date, evidence from the literature suggests that the risk of ACL injury is multifactorial and involves biomechanical, anatomical, hormonal, and neuromuscular factors. Despite this relative complexity, the mechanisms of injury are well known and rationally classified into two categories: mechanisms of injury based on contact or on non-contact with another player, with the non-contact injury mechanisms clearly prevailing over the mechanisms of contact injury. One of the most frequent biomechanical risk factors, associated with ACL non-contact injury, is represented by the valgus knee in the pivoting and cutting movements and in the landing phase after jumping. Gender-related risk factors show female populations to have a higher predisposition to ACL injury than males However, there are still some theoretical and practical aspects that need further investigation such as; genetic risks together with the role of estrogen and progesterone receptors in female populations, and the in-vivo interaction shoe-playing surface. In particular, the genetic risk factors of ACL lesion seem to be an interesting and promising field of investigation, where considerable progress has still to be made. CONCLUSIONS This narrative review provides an insight into the risk factors of ACL injury that could be used by practitioners for preventing injury in football (soccer).
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Affiliation(s)
- Gian Nicola Bisciotti
- Qatar Orthopedic and Sport Medicine Hospital, FIFA Center of Excellence, Doha, Qatar -
| | - Karim Chamari
- Qatar Orthopedic and Sport Medicine Hospital, FIFA Center of Excellence, Doha, Qatar
| | - Emanuele Cena
- Qatar Orthopedic and Sport Medicine Hospital, FIFA Center of Excellence, Doha, Qatar
| | | | | | | | - Piero Volpi
- FC Internazionale Milano, Milan, Italy.,Unit of Traumatology, Department of Knee Orthopedic and Sports, Humanitas Research Hospital, Rozzano, Milan, Italy
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Weber AE, Mayer EN, Nathani A, Chen DX, Kelly AM, Rodeo SA, Bedi A. How Variable Are Achilles Allografts Used for Anterior Cruciate Ligament Reconstruction? A Biomechanical Study. Am J Sports Med 2018; 46:1870-1876. [PMID: 29741921 DOI: 10.1177/0363546518768780] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Allograft tendon used in anterior cruciate ligament reconstruction (ACLR) requires sterilization before implantation. Low-dose gamma irradiation is a means of sterilization that may minimize tissue damage. PURPOSE To quantify the variability in mechanical properties between low-dose irradiated Achilles tendon allografts used for ACLR. STUDY DESIGN Descriptive laboratory study. METHODS A total of 15 intact outer-third Achilles tendon allograft specimens were collected from the remains of full Achilles allografts used for intraoperative ACLR at a single hospital. All grafts were obtained from a single tissue bank and underwent proprietary disinfection and low-dose gamma irradiation (1.5-2.5 Mrad). Biomechanical testing was carried out to measure tendon elongation, failure location during tensile testing, maximum stress, maximum strain, and modulus of elasticity. The mean and standard deviation were calculated for each outcome measure, and the variability between specimens was calculated by the coefficient of variation (CV). The effect of donor age on graft material properties was examined by use of linear regression. One-way analysis of variance was performed to compare differences in the mechanical properties across failure locations. RESULTS During cyclic testing, tendon elongation averaged 1.4% ± 1.6% with a CV of 118%. During failure testing, the maximum stress averaged 12.2 ± 4.1 MPa, maximum strain averaged 21.0% ± 6.3%, and modulus of elasticity averaged 95.5 ± 30.8 MPa. The CVs for maximum stress, maximum strain, and modulus of elasticity were 34%, 30%, and 32%, respectively. Ten tendons failed in the midsubstance and 5 failed at the tendon-bone enthesis. No differences were noted in mechanical properties between grafts that failed in the midsubstance versus those that failed at the enthesis. Donor age did not correlate with allograft elongation during cyclic load or any of the material property measures during failure testing. CONCLUSION The variabilities in the material properties and graft elongation during cyclic loading of Achilles tendon allografts used in ACLR fall within the range of properties reported in the literature for other ACLR allografts. Material properties do not differ by donor age or graft failure location observed during failure testing. CLINICAL RELEVANCE Surgeons should be aware that there exists considerable variation in the mechanical properties of Achilles allograft tendons used for ACLR. This variability is difficult to detect by tissue bank screening or the treating surgeon's inspection and may contribute to the heterogeneity in outcomes of allograft ACLR.
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Affiliation(s)
- Alexander E Weber
- Section of Sports Medicine, Department of Orthopaedic Surgery, University of Southern California, Los Angeles, California, USA
| | - Erik N Mayer
- Section of Sports Medicine, Department of Orthopaedic Surgery, University of Southern California, Los Angeles, California, USA
| | - Amit Nathani
- Section of Sports Medicine, Medsport, Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan, USA
| | - Dan X Chen
- Sports Medicine and Shoulder Surgery, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York, USA
| | - Anne M Kelly
- Sports Medicine and Shoulder Surgery, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York, USA
| | - Scott A Rodeo
- Sports Medicine and Shoulder Surgery, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York, USA
| | - Asheesh Bedi
- Section of Sports Medicine, Medsport, Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan, USA
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