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Kang JH, Moon SG, Lee DW. Magnetic Resonance Imaging Features of Anterolateral Ligament in Young Adults without Anterior Cruciate Ligament Injury: Preliminary Evaluation. Diagnostics (Basel) 2024; 14:1226. [PMID: 38928641 PMCID: PMC11202545 DOI: 10.3390/diagnostics14121226] [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: 03/30/2024] [Revised: 06/01/2024] [Accepted: 06/08/2024] [Indexed: 06/28/2024] Open
Abstract
This study aimed to characterize the Magnetic Resonance Imaging (MRI) features of the Anterolateral Ligament (ALL) in young adults without Anterior Cruciate Ligament (ACL) injury and evaluate its visibility using MRI. In this retrospective analysis, MRI scans of 66 young adults without ACL injuries were assessed by two radiologists. The ALL was examined from its bone-to-bone attachment between the lateral femoral epicondyle and the lateral tibia. The visibility of the ALL was classified as normal, probably normal, abnormal, or non-visualized, based on ligament continuity and thickness relative to the Meniscotibial Ligament (MTL). A continuous structure with thickness equal to or greater than the MTL was considered normal; continuous but wavy and thin features were categorized as probably normal; discontinuity and angulation were deemed abnormal. The proximal attachment of the ALL was categorized as anterior, central, or posterior to the Fibular Collateral Ligament (FCL), while the distal attachment was noted as either at the same location or distal to the MTL. The ALL was identified in 87.9-95.5% of knees and was non-visualized in 4.5-12.1% of cases. Continuous ligamentous structures were observed in 63.7-71.2% of knees (normal in 30.3-37.9%; probably normal in 27.3-40.9%), whereas 19.7-30.3% exhibited abnormal features. Inter-observer agreement was moderate to substantial (κ = 0.66, 0.56), and intra-observer agreement was substantial to excellent (κ = 0.82, 0.66). Among the 58 visible ALLs, proximal attachments were predominantly anterior (63.8%) or central (32.8%) to the FCL, with a minority posterior (1.7%). In total, 4 of the 19 central insertions were incorporated into the FCL mid-substance, and one case was blended into the meniscofemoral ligament. Distal attachments were equally distributed between the same location (50%) and distal to the MTL (50%) (mean 3.7 mm distal). In conclusion, MRI was feasible for detecting the ALL in most young adults without ACL injury, revealing continuous ligament structures in about two-thirds of cases. Approximately 40% of cases exhibited a thickness equal to or greater than the MTL, with the majority of proximal attachments located anterior to the FCL and distal attachments evenly divided between the same insertion and distal to the MTL.
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Affiliation(s)
- Ji-Hee Kang
- Department of Radiology, Konkuk University Medical Center, Seoul 05030, Republic of Korea;
| | - Sung-Gyu Moon
- Department of Radiology, Konkuk University Medical Center, Seoul 05030, Republic of Korea;
| | - Dhong-Won Lee
- Department of Orthopedic Surgery, Konkuk University Medical Center, Seoul 05030, Republic of Korea;
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Totlis T, Tishukov M, Piagkou M, Vasiliadis AV, Tsiouris C, Domashenko P, Tsakotos G, Natsis K. The Anterolateral Ligament of the Knee Is a Nonisometric Thin Ligament With High Prevalence and Almost Constant Attachment to the Lateral Meniscus: A Systematic Review With Meta-analysis. Arthroscopy 2024; 40:1288-1299. [PMID: 37832743 DOI: 10.1016/j.arthro.2023.09.031] [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: 03/12/2023] [Revised: 09/23/2023] [Accepted: 09/28/2023] [Indexed: 10/15/2023]
Abstract
PURPOSE To provide comprehensive information about the anterolateral ligament (ALL) prevalence, morphometry, isometry, insertions, histology, and its relationship with the lateral meniscus (LM). METHODS The study was performed, according to the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines. Eligible cadaveric studies investigating the frequency of the ALL presence, and anatomical features were identified through an online search of the PubMed, Scopus, and Cochrane Central databases from inception to June 2022. Statistical analysis was conducted with the open-source R programming language using the "meta" package. The Higgins I2 statistic was used for quantifying heterogeneity. RESULTS Thirty-three studies (1,478 cadaveric knees) were included. The ALL had a 79% prevalence. It was attached to the LM periphery in 97% of studies. Most studies reported a femoral insertion of the ALL, just proximal and posterior to the lateral epicondyle. Tibial attachment is constant at the midpoint between Gerdy's tubercle and fibular head. The mean ALL thickness at the joint line was 1.6 [1.2; 2.0] mm. The ALL length was found to significantly change across the knee flexion (P < .01). It was increased from 0° to 60° and decreased after 60° flexion. Seven histological studies demonstrated a typical ligamentous microstructure. CONCLUSION The ALL is a thin ligament, distinct to the knee capsule, which may be found in 79% of the knees having an almost constant attachment to the LM. The ALL is not isometric. It becomes tense during internal rotation and between 30° and 60° knee flexion. Pooled results should be interpreted with caution due to the high heterogeneity among the included studies. CLINICAL RELEVANCE This study sheds light on controversial issues and provides comprehensive and accurate information about the essential anatomical knowledge on ALL, which may contribute to optimizing ALL reconstruction surgical techniques and biomechanical settings.
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Affiliation(s)
- Trifon Totlis
- Department of Anatomy and Surgical Anatomy, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece; Thessaloniki Minimally Invasive Surgery (TheMIS) Orthopaedic Center, St. Luke's Hospital, Thessaloniki, Greece.
| | - Maksim Tishukov
- Department of Anatomy and Surgical Anatomy, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Maria Piagkou
- Department of Anatomy, School of Medicine, Faculty of Health Sciences, National and Kapodistrian University of Athens, Athens, Greece
| | - Angelo V Vasiliadis
- Sports Trauma and Orthopaedics Department, St. Luke's Hospital, Thessaloniki, Greece
| | - Christos Tsiouris
- Department of Anatomy, School of Medicine, Faculty of Health Sciences, National and Kapodistrian University of Athens, Athens, Greece
| | - Philip Domashenko
- Department of Anatomy and Surgical Anatomy, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Georgios Tsakotos
- Department of Anatomy, School of Medicine, Faculty of Health Sciences, National and Kapodistrian University of Athens, Athens, Greece
| | - Konstantinos Natsis
- Department of Anatomy and Surgical Anatomy, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Lucenti L, Testa G, Montemagno M, Sapienza M, Russo A, Di Maria F, de Cristo C, Pavone V. The Anterolateral Ligament of the Knee in Pediatric Patients: What Do We Know? A Scoping Review. J Funct Morphol Kinesiol 2023; 8:126. [PMID: 37754959 PMCID: PMC10531858 DOI: 10.3390/jfmk8030126] [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: 07/12/2023] [Revised: 08/20/2023] [Accepted: 08/22/2023] [Indexed: 09/28/2023] Open
Abstract
The knowledge on the anatomy, function and biomechanics and the role of surgical procedures on the anterolateral ligament (ALL) of the knee is still controversial. Only a few papers have examined the ALL in children. The aim of this review is to analyze all the available literature about ALL in the pediatric population. Following the PRISMA criteria, the literature was systematically reviewed, examining all the articles about ALL in pediatric patients. Eight articles were involved in this study. Five cadaveric studies, two diagnostic studies, and one cross-sectional study were found. The identification of the ALL is not always possible in diagnostic studies using magnetic resonance (MRI) or in dissecting specimens. A high variability in the presence of the ligament and in its origin and insertion were found among the studies. It is more difficult to identify the ligament in younger patients than in older children, suggesting that its presence may develop at some point during the growth. Further studies are needed for a detailed knowledge of the ALL.
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Affiliation(s)
- Ludovico Lucenti
- Department of General Surgery and Medical Surgical Specialties, Section of Orthopaedics and Traumatology, Policlinico Rodolico-San Marco, University of Catania, 95123 Catania, Italy; (L.L.); (G.T.); (M.M.); (M.S.); (F.D.M.); (C.d.C.)
| | - Gianluca Testa
- Department of General Surgery and Medical Surgical Specialties, Section of Orthopaedics and Traumatology, Policlinico Rodolico-San Marco, University of Catania, 95123 Catania, Italy; (L.L.); (G.T.); (M.M.); (M.S.); (F.D.M.); (C.d.C.)
| | - Marco Montemagno
- Department of General Surgery and Medical Surgical Specialties, Section of Orthopaedics and Traumatology, Policlinico Rodolico-San Marco, University of Catania, 95123 Catania, Italy; (L.L.); (G.T.); (M.M.); (M.S.); (F.D.M.); (C.d.C.)
| | - Marco Sapienza
- Department of General Surgery and Medical Surgical Specialties, Section of Orthopaedics and Traumatology, Policlinico Rodolico-San Marco, University of Catania, 95123 Catania, Italy; (L.L.); (G.T.); (M.M.); (M.S.); (F.D.M.); (C.d.C.)
| | - Arcangelo Russo
- Orthopaedic and Traumatology Unit, Umberto I Hospital, 94100 Enna, Italy;
| | - Fabrizio Di Maria
- Department of General Surgery and Medical Surgical Specialties, Section of Orthopaedics and Traumatology, Policlinico Rodolico-San Marco, University of Catania, 95123 Catania, Italy; (L.L.); (G.T.); (M.M.); (M.S.); (F.D.M.); (C.d.C.)
| | - Claudia de Cristo
- Department of General Surgery and Medical Surgical Specialties, Section of Orthopaedics and Traumatology, Policlinico Rodolico-San Marco, University of Catania, 95123 Catania, Italy; (L.L.); (G.T.); (M.M.); (M.S.); (F.D.M.); (C.d.C.)
| | - Vito Pavone
- Department of General Surgery and Medical Surgical Specialties, Section of Orthopaedics and Traumatology, Policlinico Rodolico-San Marco, University of Catania, 95123 Catania, Italy; (L.L.); (G.T.); (M.M.); (M.S.); (F.D.M.); (C.d.C.)
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Athanasiou V, Panagopoulos A, Kouzelis A, Kokkalis ZT, Lakoumentas J, Katsanos K, Gliatis J. A Review of Current Concepts of the Anterolateral Complex of the Knee. Orthop Rev (Pavia) 2022; 14:38651. [PMID: 36213619 PMCID: PMC9536860 DOI: 10.52965/001c.38651] [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: 08/19/2023] Open
Abstract
The anterolateral complex (ALC) of the knee has gained increased interest over the last decades due to the high revision rates of anterior cruciate ligament reconstruction (ACLR). Furthermore, in patients with an ACL tear, the injury of at least one of the ALC's anatomic structures has been shown to be significantly higher, thus affecting its secondary stabilizing role at the knee joint. As such, ACLR augmentation techniques, that embrace the ALC, have been proposed recently, and indications for these procedures are still evolving. This review aims to present and discuss the most current anatomical, biomechanical, and imaging data, current reconstruction techniques, and the clinical results of ALC reconstruction.
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Affiliation(s)
| | | | | | | | - John Lakoumentas
- Medical Physics Department, Medical School, University of Patras, Patras, Greece
| | | | - John Gliatis
- Orthopaedic Department, Patras University Hospital, Greece
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Intrameniscal degeneration and meniscotibial ligament loosening are associated factors with meniscal extrusion of symptomatic discoid lateral meniscus. Knee Surg Sports Traumatol Arthrosc 2022; 31:2358-2365. [PMID: 36112159 DOI: 10.1007/s00167-022-07161-6] [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: 05/30/2022] [Accepted: 09/06/2022] [Indexed: 10/14/2022]
Abstract
PURPOSE This study aimed to compare the amount of extrusion of the discoid lateral meniscus (DLM), which was symptomatic and required surgery, with normal meniscuses and asymptomatic DLMs and examine factors associated with the extrusion of symptomatic DLM. METHODS Medical records of participants with DLM or normal lateral meniscus (LM) were retrospectively reviewed using magnetic resonance imaging (MRI). DLM cases were divided into symptomatic and asymptomatic groups. The midbody meniscal extrusion was measured using mid-coronal MRI. The association between meniscal extrusion and MRI findings, including the meniscofemoral ligament, meniscotibial ligament (MTL), intrameniscal signal intensity of the peripheral rim, meniscal shift, and skeletal maturity, was evaluated. RESULTS Eighty-six knees with DLM (63 symptomatic) were included. The control group included 31 patients. The symptomatic group showed significantly greater meniscal extrusion (mean ± standard deviation symptomatic DLM: 1.0 ± 1.1 mm, asymptomatic DLM: 0.1 ± 0.4 mm, and normal LM: 0.3 ± 0.6 mm, P < 0.001) and had a significantly higher incidence of MTL loosening (P = 0.02) and intrameniscal signal (P < 0.001) than the other two groups. In the symptomatic group, multivariable linear regression analysis showed that MTL loosening [β = 1.45, 95% confidence interval (CI) 1.03-1.86, P < 0.001] and intrameniscal signal (β = 0.49, 95% CI 0.09-0.90, P = 0.002) were independent associated factors. CONCLUSIONS LM extrusion was significantly more common in patients with symptomatic DLM than in those with asymptomatic DLM or a normal LM. MTL loosening and intrameniscal high-signal intensity on MRI were independently associated with meniscal extrusion. These findings help explain the pathogenesis and diagnosis of symptomatic DLM. LEVEL OF EVIDENCE III.
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Sabatini L, Capella M, Vezza D, Barberis L, Camazzola D, Risitano S, Drocco L, Massè A. Anterolateral complex of the knee: State of the art. World J Orthop 2022; 13:679-692. [PMID: 36159618 PMCID: PMC9453282 DOI: 10.5312/wjo.v13.i8.679] [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: 12/28/2021] [Revised: 03/07/2022] [Accepted: 07/25/2022] [Indexed: 02/06/2023] Open
Abstract
Rotatory instability of the knee represents the main reason for failure and poor clinical outcomes regarding anterior cruciate ligament (ACL) reconstruction techniques. It is now clear that the anterolateral complex (ALC) of the knee possesses a fundamental role, in association with the ACL, in controlling internal rotation. Over the past decade, ever since the anterolateral ligament has been identified and described as a distinct structure, there has been a renewed interest in the scientific community about the whole ALC: Lateral extra-articular tenodesis have made a comeback in association with ACL reconstructions to improve functional outcomes, reducing the risks of graft failure and associated injuries. Modern ACL reconstruction surgery must therefore investigate residual instability and proceed, when necessary, to extra-articular techniques, whether functional tenodesis or anatomical reconstruction.This review aims to investigate the latest anatomical and histological descriptions, and the role in rotational control and knee biomechanics of the ALC and its components. The diagnostic tools for its identification, different reconstruction techniques, and possible surgical indications are described.. In addition, clinical and functional results available in the literature are reported.
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Affiliation(s)
- Luigi Sabatini
- Department of Orthopaedics and Traumatology, Università degli Studi di Torino, Torino 10126, Italy
| | - Marcello Capella
- Department of Orthopaedics and Traumatology, Università degli Studi di Torino, Torino 10126, Italy
| | - Daniele Vezza
- Department of Orthopaedics and Traumatology, Università degli Studi di Torino, Torino 10126, Italy
| | - Luca Barberis
- Department of Orthopaedics and Traumatology, Università degli Studi di Torino, Torino 10126, Italy
| | - Daniele Camazzola
- Department of Orthopaedics and Traumatology, Università degli Studi di Torino, Torino 10126, Italy
| | - Salvatore Risitano
- Department of Orthopaedics and Traumatology, Università degli Studi di Torino, Torino 10126, Italy
| | - Luca Drocco
- Department of Orthopaedics and Traumatology, Università degli Studi di Torino, Torino 10126, Italy
| | - Alessandro Massè
- Department of Orthopaedics and Traumatology, Università degli Studi di Torino, Torino 10126, Italy
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Olewnik Ł, LaPrade RF, Paulsen F, Gonera B, Kurtys K, Podgórski M, Aragonés P, Sanudo JR, Polguj M. A proposal for a new morphological classification of the popliteus muscle tendon with potential clinical and biomechanical significance. Sci Rep 2021; 11:14434. [PMID: 34262097 PMCID: PMC8280136 DOI: 10.1038/s41598-021-93778-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 06/21/2021] [Indexed: 01/11/2023] Open
Abstract
The purpose of this study was to characterize the morphological variations in the proximal attachments and create an accurate classification of the PPM for use in planning surgical procedures in this area, for evaluating radiological imaging and rehabilitation. One hundred and thirty-four lower limbs of body donors (52 woman and 82 man) fixed in 10% formalin solution were examined. The popliteus muscle was present in all 134 limbs. Four main types were identified with subtypes. The most common type was Type I (34.3%), characterized by a single tendon in the popliteus sulcus. Type II (30.6%) characterized by a main tendon in the popliteus sulcus and accessory bands. This type was divided into five subtypes (A-E) based on presence of specific accessory bands. Type III (15.3%) was characterized by two tendons in the popliteal sulcus. Type IV (19.4%) was characterized by two tendons in the popliteus sulcus and additional bands. This type was also divided into five subtypes (A-E) based on presence of specific accessory bands. The popliteofibular ligament was present in 90.3% of cases. A new classification based on a proximal attachment is proposed. The popliteus tendon is characterized by a very high morphological variability, which can affect posterolateral knee stability and the natural rotation of the tibia. Such a classification system may be useful for clinicians performing medical procedures within the knee joint, including orthopedic surgeons.
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Affiliation(s)
- Łukasz Olewnik
- Department of Anatomical Dissection and Donation, Medical University of Lodz, Lodz, Poland.
| | | | - Friedrich Paulsen
- Institute of Functional and Clinical Anatomy, Friedrich Alexander University Erlangen-Nürnberg, Erlangen, Germany
- Department of Topographic Anatomy and Operative Surgery, Sechenov University, Moscow, Russia
| | - Bartosz Gonera
- Department of Anatomical Dissection and Donation, Medical University of Lodz, Lodz, Poland
| | - Konrad Kurtys
- Department of Anatomical Dissection and Donation, Medical University of Lodz, Lodz, Poland
| | - Michał Podgórski
- Department of Imaging Diagnostic, Polish Mother's Memorial Hospital Research Institute, Lodz, Poland
| | - Paloma Aragonés
- Department of Orthopedics Surgery. Hospital Santa Cristina, Madrid, Spain
| | - J Ramón Sanudo
- Department of Human Anatomy and Embryology, Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - Michał Polguj
- Department of Normal and Clinical Anatomy, Chair of Anatomy and Histology, Medical University of Lodz, Lodz, Poland
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Littlefield CP, Belk JW, Houck DA, Kraeutler MJ, LaPrade RF, Chahla J, McCarty EC. The Anterolateral Ligament of the Knee: An Updated Systematic Review of Anatomy, Biomechanics, and Clinical Outcomes. Arthroscopy 2021; 37:1654-1666. [PMID: 33340678 DOI: 10.1016/j.arthro.2020.12.190] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 11/29/2020] [Accepted: 12/03/2020] [Indexed: 02/02/2023]
Abstract
PURPOSE To perform an updated systematic review of the anatomy, biomechanics, function of the anterolateral ligament (ALL), and the clinical outcomes of anterolateral ligament reconstruction (ALLR) when performed in conjunction with anterior cruciate ligament reconstruction (ACLR). METHODS A systematic search of the literature was performed by searching PubMed, the Cochrane Library, and Embase with the search phrase anterolateral ligament for articles published from February 2017 to May 2020. Inclusion criteria included studies that evaluated the anatomy, function, or biomechanics of the ALL; surgical technique articles on ALLR; clinical articles reporting outcomes of ALLR; studies published in English; and full-text articles. Exclusion criteria included studies published before February 2017. A subjective synthesis was performed, in which ranges were reported, and individual study data were presented in forest plots. RESULTS Overall, 40 articles were included in this systematic review, with 11 articles describing ALL anatomy, 14 articles analyzing ALL function and biomechanics, 7 articles discussing the surgical technique of combined ACLR and ALLR (ACLR/ALLR), and 8 articles describing the clinical outcomes of ACLR/ALLR. The addition of ALLR in combination with ACLR (ACLR+) results in lower graft failure rates for ACLR/ALLR (0.0%-15.7%) when compared with isolated ACLR (I-ACLR) patients (7.4%-21.7%). Three of 5 studies using the Subjective International Knee Documentation Committee score, 2 of 5 studies using the Lysholm score, and 1 of 2 studies using the Tegner score reported significantly better scores at latest follow-up among ACLR+ patients compared with I-ACLR (P < .05). CONCLUSIONS The ALL acts as a secondary stabilizer to the anterior cruciate ligament and helps resist internal knee rotation and anterior tibial translation. Based on the current literature, combined ACLR with ALLR may result in lower graft failure rates and improved patient-reported outcomes when compared with I-ACLR in patients with specific indications, although several studies have shown equivalent outcomes between these 2 cohorts. CLINICAL RELEVANCE The contents of this review provide great insight for orthopaedic surgeons who are performing ACLR and considering additional procedures to increase overall knee stability and decrease likeliness for re-rupture. The postoperative functional and clinical outcomes shown in patients undergoing ACLR+ compared with I-ACLR should be given proper consideration when evaluating available treatment courses.
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Affiliation(s)
- Connor P Littlefield
- University of Colorado School of Medicine, Department of Orthopaedics, University of Colorado, Aurora, Colorado, U.S.A
| | - John W Belk
- University of Colorado School of Medicine, Department of Orthopaedics, University of Colorado, Aurora, Colorado, U.S.A..
| | - Darby A Houck
- University of Colorado School of Medicine, Department of Orthopaedics, University of Colorado, Aurora, Colorado, U.S.A
| | - Matthew J Kraeutler
- St. Joseph's University Medical Center, Department of Orthopaedic Surgery, Paterson, New Jersey, U.S.A
| | | | - Jorge Chahla
- Division of Sports Medicine, Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois, U.S.A
| | - Eric C McCarty
- University of Colorado School of Medicine, Department of Orthopaedics, University of Colorado, Aurora, Colorado, U.S.A
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