Summary: There was no single dominant geometric or AP laxity risk factor for ACL injury in our cohort of young, male and female athletes; therefore, geometric and AP laxity risk factors likely act together to increase risk of noncontact ACL injury.

Introduction

Limited data exist regarding the association of tibiofemoral bony and soft tissue geometries and knee laxity with risk of first-time, noncontact anterior cruciate ligament (ACL) rupture. Previous work focusing on the role of knee geometry revealed that combinations of variables, which differ between females and males, are associated with risk of injury [1]. However, this work did not account for anterior-posterior (AP) knee laxity, another important risk factor for non-contact ACL injury [2]. The purpose of this study was to determine associations of tibiofemoral geometry and AP knee laxity with risk of first-time, noncontact ACL injury in high school and collegiate male and female athletes.

Methods

Over a four-year period, noncontact ACL injury events were identified as they occurred in 86 high school and collegiate athletes. Sex- and age-matched control subjects were selected from the same team. AP knee laxity was measured using a KT-2000 arthrometer. Magnetic resonance imaging was taken on ipsilateral and contralateral knees and articular geometries were measured. Sex-specific general additive models (GAMs) were implemented to investigate associations between injury risk and six biomechanical features [3]. Importance scores were calculated to rank the relative contribution of each variable.

Results

In the female cohort, the two features with the highest importance scores were lateral middle cartilage slope at 8.6% and notch width at 8.1%. In the male cohort, the two top-ranked features were AP laxity at 5.6% and lateral middle cartilage slope at 4.8%. In females, injury risk increased with lateral middle cartilage slope becoming more posterior-inferior from -6.2° to -2.0°, with a 25.5% increase in risk over this range. An increase in lateral meniscus-bone wedge angle from 27.3° to 28.2° was associated with a 17.5% decrease in risk. In males, an increase in AP displacement from 12.5 to 14.4 mm was associated with a 16.7% increase in risk.

Discussion

Of the six variables studied, there was no single dominant geometric or AP laxity risk factor for ACL injury in either the female or male cohorts. AP laxity in males was associated with sharply increased risk around 13-14 mm. Lateral meniscus-bone wedge angle in females was associated with sharply decreased risk around 28°. Geometric and laxity risk factors act cumulatively to modulate risk of noncontact ACL injury. Thresholds of AP laxity in males and lateral meniscus-bone wedge angle in females associated with elevated injury risk could provide targets to guide both surgical and conservative treatments to reduce risk of ACL injury.

REFERENCES: [1] Sturnick. AJSM 2015. [2] Uhorchak. AJSM 2003. [3] Lou. SIGKDD 2013.

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Midterm Clinical Outcomes and Knee Stability After ACL Reconstruction With a Hybrid Graft Using Hamstring Autograft and Ligament Augmentation and Reconstruction System LARS ePoster Presentation Antonios T. Kouzelis, MD, PhD, GREECE Andreas Panagopoulos, Associate Professor, GREECE Panagiotis Antzoulas, MD, MSc, GREECE Panagiotis Tsiplakos, MD, GREECE Georgios Sinos, MD, GREECE Spyridon Papagiannis, MD, GREECE Ioannis Gliatis, MD, PhD, Assistant Proffessor, GREECE
Isolated Anatomic Reconstruction of Anterior Cruciate Ligament in Sportsmen with High Pivot Shift Grade: Is it Enough for Rotational Stability? ePoster Presentation Mohamed Amine Gharbi , MD, TUNISIA Moatassem Belleh Jelassi, MD, TUNISIA Houssem Eddine Chahed, MD, TUNISIA Ahmed Zendeoui, MD, TUNISIA Anis Tebourbi, MD, TUNISIA Ramzi Bouzidi, PhD, TUNISIA Khelil Ezzaouia, PhD, TUNISIA Mouadh Nefiss, MD, TUNISIA
No Evidence of Racial Disparities in Revision Risk Following ACL Reconstruction in a Single Healthcare Network Despite Increased Social Disadvantage Among Black Patients ePoster Presentation Ian DeYoe Engler, MD, UNITED STATES Sahil Dadoo, BS, UNITED STATES William T. Li, MD, UNITED STATES Robert Tisherman, UNITED STATES Audrey Y. Chang, BA, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES
Effect of The Tibial Tunnel Communication on the Bone-Tendon Healing and Location of the Graft at the Tibial Tunnel Aperture in The Double-Bundle Anterior Cruciate Ligament Reconstruction ePoster Presentation Naoto Suzue, MD, PhD, JAPAN Yoshitsugu Takeda, MD, PhD, JAPAN
Elevated Posterior Tibial Slope is Associated with Anterior Cruciate Ligament Reconstruction Failures: A Systematic Review and Meta-Analysis ePoster Presentation Benjamin Ormseth, BS, UNITED STATES Jeremy Adelstein, BS, UNITED STATES Andrew Garrone, MD, UNITED STATES Alex C. Dibartola, MD, MPH, UNITED STATES Ryan H. Barnes, MD, UNITED STATES Charles Qin, MD, UNITED STATES Christopher C. Kaeding, MD, UNITED STATES David C. Flanigan, MD, UNITED STATES Robert Siston, PhD, UNITED STATES Robert A Magnussen, MD, MPH, UNITED STATES Robert A. Duerr, MD, UNITED STATES
Short-Term Outcomes of All-Inside Anterior Cruciate Ligament Reconstruction by the Trans-Femoral Approach ePoster Presentation Toshiaki Takahashi, MD, PhD, Prof., JAPAN Seiji Watanabe, MD, JAPAN
A Comparison of Return to Sport Rates Between Male and Female Athletes After Anterior Cruciate Ligament Reconstruction in an Australian Context ePoster Presentation Haydn Klemm, BFSc&Nutr (Hons), AUSTRALIA Kate E. Webster, PhD, AUSTRALIA Julian A. Feller, FRACS, FAOrthA, AUSTRALIA
Mid-Term Results of Anterior Cruciate Ligament Reconstruction with Anterolateral Augmentation, Lemaire Tenodesis, in Soccer Players. Functional Results and Return to Play ePoster Presentation Pedro Alvarez-Diaz, MD, PhD, Prof., SPAIN Enrique Pavez, MD, CHILE Gilbert Steinbacher, MD, SPAIN Eduard Alentorn-Geli, MD, PhD, MSc, FEBOT, FACGME, SPAIN David Barastegui, MD, PhD, MSc, SPAIN Jorge Ramirez Haua, MD, SPAIN Maria Victoria Pomenta, MD, SPAIN Esther Sala, MD, SPAIN Sebatian Grossi, MD, SPAIN Aleix Pons Bartroli, MD , SPAIN Patricia Laiz Boada, BSc, SPAIN Ramon Cugat Bertomeu, MD, PhD, SPAIN
Is There Any Benefit In Anterior Cruciate Ligament Reconstruction In Patients Over 60 Years Old? ePoster Presentation Panagiotis G. Ntagiopoulos, MD, PhD, GREECE Paolo Ferrua, MD, ITALY Guillaume Demey, MD, FRANCE David H. Dejour, MD, FRANCE
Clinical and Functional Outcomes of Augmented Repair Versus Primary Repair in Anterior Cruciate Ligament Injury: A Systematic Review and Meta-Analysis ePoster Presentation Bing Howe Lee, MBBS, MRCS, SINGAPORE Michael Xuanrong Shen, MBBS, MRCS, MMED, SINGAPORE Mohammad Ashik, MBBS, MRCSEd, MMed (Ortho), FRCSEd(Orth), SINGAPORE Hamid Rahmatullah Bin Abd Razak, MBBS, FRCSEd (Ortho), FRCSGlasg (Tr & Orth), FAMS, SINGAPORE
Quadrupled Semitendinosus vs. Semitendinosus-Gracilis Graft for ACL Reconstruction:a Randomized Controlled Trial ePoster Presentation Juan Pablo Martinez-Cano, MD, MSc, PhD, COLOMBIA Laura Zamudio, MD, COLOMBIA Julian Chica, MD, COLOMBIA Juan José Martinez Arboleda, MD, COLOMBIA Fernando M. Mejia, MD, COLOMBIA Alfredo Martinez Rondanelli, MD, COLOMBIA
Respective Functions of the ACL and the Medial Structures on the Control of Anterior Translation and Rotations of the Knee. Cadaveric Study of 24 Knees with the Dyneelax® ePoster Presentation Henri E. Robert, MD, FRANCE Baptiste Guegan, FRANCE Harold Common, MD, FRANCE
Altered Trunk Movements During Running after Anterior Cruciate Ligament Reconstruction ePoster Presentation Jodie A. McClelland, BPhysio(Hons), PhD, AUSTRALIA Julian A. Feller, FRACS, FAOrthA, AUSTRALIA Michael Maes, Md, BELGIUM Gustaf Gauffin, SWEDEN Anna Nilsson, SWEDEN Kate E. Webster, PhD, AUSTRALIA
Early Results of ACL Reconstruction with Quadriceps Tendon Autograft All-Inside Technique ePoster Presentation Amogh Iyer, BS, UNITED STATES Galo Bustamante, BS, UNITED STATES Eric Milliron, BS, UNITED STATES Parker Cavendish, BS, UNITED STATES James C. Kirven, BS, UNITED STATES Spencer E. Talentino, MD, UNITED STATES Charles Qin, MD, UNITED STATES Ryan H. Barnes, MD, UNITED STATES David C. Flanigan, MD, UNITED STATES Christopher C. Kaeding, MD, UNITED STATES Robert A Magnussen, MD, MPH, UNITED STATES Robert A. Duerr, MD, UNITED STATES
Patients Undergoing Reconstruction For Multi-Ligament Knee Injuries Caused By Pivoting Sports Restore Function And Return to Sport at a Similar Level to Their Isolated ACL Counterparts: A Prospective Matched Cohort Study ePoster Presentation Jay R. Ebert, PhD, AUSTRALIA Peter Edwards, PhD, AUSTRALIA Shahbaz S Malik, BSc, MB BCh, MSc (Orth Engin), LLM, FRCS (Tr&Orth), UNITED KINGDOM Stephen Dalgleish, MBChB, MRCS, FRCS, UNITED KINGDOM Antony Raymond, FRCS, UNITED KINGDOM Randeep Singh Aujla, MBChB ChM FRCS (Tr&Orth) MFSEM, UNITED KINGDOM Robert Evans, MD, AUSTRALIA Michael Andreas Finsterwald, MD, AUSTRALIA Uriel Giwnewer , MD, ISRAEL Ashley Iain Simpson, BA(Hons), MBBS, MSc, MA(Cantab), FRCS(Tr&Orth), UNITED KINGDOM Sat Gohil, MBBS, FRACS(Ortho), AUSTRALIA Peter Alberto D'Alessandro, MBBS Hons. (UWA) FRACS FAOrthA, AUSTRALIA
No tourniquet reduces the incidence of asymptomatic deep venous thrombosis identified on ultrasonography after arthroscopic anterior cruciate ligament reconstruction: an observational study ePoster Presentation Masaki Nagashima, MD, PhD, Prof., JAPAN Ryo Sasaki, MD, JAPAN Kentaro Tanaka, MD, JAPAN Kenichiro Takeshima, MD, JAPAN Ken Ishii, MD, PhD, JAPAN
Quadriceps Autograft Is A Viable Graft Choice For ACL Reconstruction In Patients Over 50 Years Old ePoster Presentation Amit Meena, MBBS, MS, DNB, INDIA Luca Farinelli, MD, ITALY Christian Hoser, MD, AUSTRIA Elisabeth Abermann, MD, AUSTRIA Mirco Herbort, MD, Prof., GERMANY Christian Fink, MD, Prof., AUSTRIA
An Evaluation Of The Relationship Between The Knee Stability And Remnant Re-Attachment In Anterior Cruciate Ligament Injury ePoster Presentation YUSUKE SASAKI, MD, JAPAN Satomi Abe, MD, PhD, JAPAN Keisuke Matsukura, UNITED STATES
A Novel Quantitative Assessment of Bone Tendon Junction Healing in Patients after ACL Reconstruction by High Resolution Peripheral Computer Tomography: The Development of a Deep-Learning System ePoster Presentation Michael Ong, MBChB(UK), BSc(UK), MRCS(Edin), MSc(CUHK), FRCSEd, HONG KONG Patrick S. H. Yung, MBChB, FRCS(Orth), FHKCOS, FHKAM, FRCS, HONG KONG
Preoperative Templating of Bone-Patellar Tendon-Bone Graft for ACL Reconstruction: An Individualised Morphometry-Based Graft Harvest Method ePoster Presentation Prakash Ayyadurai, MS, INDIA Arumugam Sivaraman, MS(Orth), AB(IM)(USA), FRCS(Glasg), INDIA Suresh Perumal, MS(Orth), INDIA Janani Gopalakrishnan, MD (Sports Medicine), INDIA
Transtibial Femoral Tunnel Technique In ACL Reconstruction and Osteoarthritis Incidence ePoster Presentation Marcus Vinicius Danieli, MD, PhD, BRAZIL João P.F. Guerreiro, MD, PhD, BRAZIL Joao Vitor Guedes Guedes Suzze, MD, BRAZIL Victoria de Abreu, MD, BRAZIL
Morphological Evaluation Of The Quadriceps Tendon Using Preoperative Ultrasound In Anterior Cruciate Ligament Reconstruction ePoster Presentation Satoshi Takeuchi, MD, PhD, JAPAN Kevin J Byrne, MD, UNITED STATES Ryo Kanto, MD, JAPAN Kentaro Onishi, DO, UNITED STATES
Double Bundle ACL Revision Reconstruction with Allograft Resulted In a Low Revision Rate At 10 Year ePoster Presentation Luca Macchiarola, MD, ITALY Nicola Pizza, MD, ITALY Alberto Grassi, PhD, ITALY Giacomo Dal Fabbro, ITALY Stefano Zaffagnini, MD, Prof., ITALY
Biomechanical Study of the Elastic Fixation of the Posterolateral Fracture of the Tibial Plateau: Arrow Technique ePoster Presentation Oscar Ares, PhD, SPAIN David Gutierrez Medina, MD, SPAIN Carlos Andres Morales-Marin, MD, SPAIN Salvador Madariaga, MD, SPAIN Andrea Sallent, MD, PhD, SPAIN Jose Alonso Zumbado, MD, SPAIN Manuel Llusà, SPAIN
Automated, Video-Based Analysis of Motion Patterns to Diagnose Anterior Cruciate Ligament Injuries in In-Game Video Footage ePoster Presentation Attila Schulc, UNITED STATES Chilan Bou Ghosson Leite, MD, PhD, UNITED STATES Máté Csákvári, UNITED STATES Luke Lattermann, UNITED STATES Molly Zgoda, MS, UNITED STATES Evan M Farina, MD, UNITED STATES Christian Lattermann, MD, UNITED STATES Zoltán Tősér, UNITED STATES Gergo B Merkely, MD, PhD, UNITED STATES
Effectiveness of Fibrin Clot Implantation for Reduction Of Bone Tunnel Enlargement In Bundle-Bundle ACL Reconstruction Using Autogenous Hamstring Tendon Grafts ePoster Presentation Nobuyoshi Suzuki, MD, JAPAN Tomoya Iseki, MD, PhD, JAPAN Shintaro Onishi, MD, PhD, JAPAN Ryo Kanto, MD, JAPAN Hiroshi Nakayama, MD, JAPAN Shinichi Yoshiya, MD, JAPAN Toshiya Tachibana, MD, PhD, JAPAN
Steeper Lateral Posterior Tibial Slope And Greater Lateral-Medial Slope Asymmetry are Associated With Greater Preoperative Pivot-Shift In Anterior Cruciate Ligament Injury ePoster Presentation Kiminari Kataoka, MD, JAPAN Kanto Nagai, MD, PhD, JAPAN Yuichi Hoshino, MD, PhD, JAPAN Masashi Shimabukuro, JAPAN Kyohei Nishida , MD, PhD, JAPAN Noriyuki Kanzaki, MD, PhD, JAPAN Takehiko Matsushita, MD, PhD, JAPAN Ryosuke Kuroda, MD, PhD, JAPAN
Acceptable Clinical Outcomes Despite High Reoperation Rate at Minimum 12-Month Follow-Up after Concomitant Arthroscopically Assisted Anterior Cruciate Ligament Reconstruction and Medial Meniscal Allograft Transplantation ePoster Presentation Dhruv Sundar Shankar, BS, UNITED STATES Kinjal Vasavada, BA, UNITED STATES Amanda Avila, MPH, UNITED STATES Brittany DeClouette, MD, UNITED STATES Hadi Aziz, BS, UNITED STATES Eric Jason Strauss, MD Michael J Alaia, MD, UNITED STATES Laith M. Jazrawi, MD, UNITED STATES Guillem Gonzalez-Lomas, MD, UNITED STATES Kirk Anthony Campbell, MD, UNITED STATES
Elevated Tibial Spine Height as a Predictor of Reinjury after Anterior Cruciate Ligament Reconstruction ePoster Presentation Naofumi Hashiguchi, MD, JAPAN Atsuo Nakamae, MD, PhD, JAPAN Goki Kamei, MD, PhD, JAPAN Masakazu Ishikawa, MD, PhD, JAPAN Nobuo Adachi, MD, PhD, JAPAN
An Analysis Of Repeat Anterior Cruciate Ligament Injury and Return to Sport in Australian Soccer Players Demonstrates Hamstring Autografts to be a Reliable Option ePoster Presentation Jonathan R Manara, BMBS, FRCS (Tr & Orth), UNITED KINGDOM Lucy J. Salmon, PhD, AUSTRALIA Faisal Kilani, BSc, AUSTRALIA Claire Monk, BS, AUSTRALIA Keran Sundaraj, MBBS MCs (Trauma) FRACS FAOA, AUSTRALIA Leo A. Pinczewski, MBBS, FRACS, FAOA, AUSTRALIA Justin P. Roe, FRACS, A/Prof., AUSTRALIA
Does Delaying First Revision ACLR Result in Poorer Outcomes? Evaluation of Association Between Surgical Timing and Outcomes ePoster Presentation Bryce Dzubara, BS, UNITED STATES Parker Cavendish, BS, UNITED STATES Eric Milliron, BS, UNITED STATES James C. Kirven, BS, UNITED STATES Spencer E. Talentino, MD, UNITED STATES Ryan H. Barnes, MD, UNITED STATES Charles Qin, MD, UNITED STATES David C. Flanigan, MD, UNITED STATES Robert A. Duerr, MD, UNITED STATES Christopher C. Kaeding, MD, UNITED STATES Robert A Magnussen, MD, MPH, UNITED STATES
Delaying ACL Reconstruction Increases the Rate and Severity of Medial Compartment Chondral Injury ePoster Presentation Nicolas Cance, Resident, FRANCE Julien Erard, MD, FRANCE Jobe Shatrov, MD, AUSTRALIA Gaspard Fournier, MD, FRANCE Stanislas Gunst, MD, FRANCE Gianluca Ciolli, MD, ITALY Pasquale Porcelli, MD, ITALY Sebastien Lustig, MD, PhD, FRANCE Elvire Servien, MD, PhD, Prof., FRANCE
ACL Repair Versus ACL Reconstruction: A Propensity Matched Study ePoster Presentation Adnan Saithna, MD, FRCS, UNITED STATES Alexandre Ferreira, MD, FRANCE Alessandro Carrozzo, MD, ITALY Sylvain Guy, MD, FRANCE Thais Dutra Vieira, MD, FRANCE Johannes Barth, MD, Prof., FRANCE Bertrand Sonnery-Cottet, MD, PhD, FRANCE
Non-Operative Treatment is an Excellent Option for Isolated Anterior Cruciate Ligament Injuries: a Systematic Review and Meta-Analysis ePoster Presentation Robert de Jonge, MD, HUNGARY Miklos Mate, MD, HUNGARY Norbert Kovacs, MD, HUNGARY Marcell Imrei, MD, , HUNGARY Karoly Pap, MD, PhD, HUNGARY Gergely Agocs, PhD, HUNGARY Peter Hegyi, Prof., HUNGARY Gergely Pánics, PhD, HUNGARY
Revision Anterior Cruciate Ligament Reconstruction with All Soft Tissue Quadriceps Tendon Autograft and Quadriceps Tendon Autograft with Bone Block Have Similar Clinical Outcomes ePoster Presentation Asher B Mirvish, BA, UNITED STATES Joshua C Setliff, BA, UNITED STATES Ehab M Nazzal, MD, UNITED STATES Nicholas P Drain, MD, UNITED STATES Zachary J Herman, MD, UNITED STATES Clair Smith, MSc, UNITED STATES Bryson P. Lesniak, MD, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES Jonathan D Hughes, MD, UNITED STATES
Outcomes of Revision Anterior Cruciate Ligament Reconstruction with autogenous Quadriceps Tendon graft ePoster Presentation Gustavo A. Rincon, MD, COLOMBIA Edgar Alberto Munoz, MD, COLOMBIA Camilo Marin, MD, COLOMBIA Hans Martin, MD, COLOMBIA Angela Morales, MD, COLOMBIA
Differences in Temporospatial Hop Characteristics Between Limbs at Return to Sport After ACL Reconstruction ePoster Presentation Alex Gabriel Gavia, BS, UNITED STATES Dave Werner, PT, DPT, OCS, CSCS, UNITED STATES Michael Wellsandt, PT, DPT, UNITED STATES Michael Rosenthal, UNITED STATES Matthew Tao, MD, UNITED STATES Elizabeth Wellsandt, DPT, PhD, UNITED STATES
Social Media Content Related to ACL Recovery: An Analysis ePoster Presentation Sabreena Moosa, HBSc, CANADA Isabel Thomas, HBSc, CANADA Darren L. de SA, MBA(c), MD FRCSC, CANADA
Impact of ACLR Graft Choice on Meniscal Repair Outcomes ePoster Presentation Emily Coffey, BS, UNITED STATES Amogh Iyer, BS, UNITED STATES Parker Cavendish, BS, UNITED STATES Eric Milliron, BS, UNITED STATES Spencer E. Talentino, MD, UNITED STATES James C. Kirven, BS, UNITED STATES Charles Qin, MD, UNITED STATES Ryan H. Barnes, MD, UNITED STATES David C. Flanigan, MD, UNITED STATES Robert A Magnussen, MD, MPH, UNITED STATES
Posterior Displacement Of The Detached Meniscocapsular Ligament Of Ramp Lesion In ACL Injured Knee Observed On MRI In Flexed Knee Position Is Associated With Greater Preoperative Anterior Knee Laxity ePoster Presentation Satoshi Nonaka, MD, JAPAN Kazuhisa Hatayama, MD, PhD, JAPAN Hibiki Kakiage, MD, JAPAN Masanori Terauchi, MD, JAPAN
Comparable Primary Stability Between Current-Generation Adjustable Loop Cortical Buttons for Anterior Cruciate Ligament Reconstruction – A Biomechanical Study ePoster Presentation Adrian Deichsel, MD, GERMANY Lara Leibrandt, cand. med., GERMANY Michael J. Raschke, MD, Prof., GERMANY Matthias Klimek, M. Sc., GERMANY Jens Wermers, MD, GERMANY Christian Peez, MD, GERMANY Thorben Briese, MD, GERMANY Elmar Herbst, MD, PhD, GERMANY Christoph Kittl, MD, MD(res), GERMANY Johannes Glasbrenner, MD, GERMANY
Tibial Slope in Anterior Cruciate Ligament Deficient Knees Does Not Affect the Incidence of Concomitant Ligamentous Injuries ePoster Presentation Khai Cheong Wong, MBChB, MRCS (Eng), SINGAPORE Merrill Lee, MBBS, MRCS(Edin), SINGAPORE Mark H.X. Yeo, MBBS, SINGAPORE Shawn Js Seah, MBBS, SINGAPORE Glen Ho, MBBS, SINGAPORE Paul Chee Cheng Chang, MBBS,FRCS, SINGAPORE Denny T. T. Lie, MBBS, FRCS, FAMS, SINGAPORE
High Prevalence Of Injuries Associated With ACL Tears: A Detailed Analysis Of 253 Patients From A National Multi-center Cohort Study ePoster Presentation Riccardo Cristiani, MD, PhD, SWEDEN Fabian Van de Bunt, MD, PhD, SWEDEN Joanna Kvist, Professor, RPT, SWEDEN Anders Stalman, MD, PhD, associate professor, SWEDEN
Femoral Button is Not Applied: Does It Matter ? ePoster Presentation Mohamed Amine Gharbi , MD, TUNISIA Moatassem Belleh Jelassi, MD, TUNISIA Ahmed Zendeoui, MD, TUNISIA Houssem Eddine Chahed, MD, TUNISIA Anis Tebourbi, MD, TUNISIA Ramzi Bouzidi, PhD, TUNISIA Khelil Ezzaouia, PhD, TUNISIA Mouadh Nefiss, MD, TUNISIA
A Comparison of Postoperative Outcomes Between Internal Brace Augmented and Non-Augment Hamstring Tendon Autograft Anterior Cruciate Ligament Reconstruction (ACLR) ePoster Presentation Maria Melanie Legaspi Valbuena, MD, MBA, PHILIPPINES Raphael Coligado Jurilla, MD, PHILIPPINES Patrick How, PHILIPPINES Jason Paul Santiago, MD, PHILIPPINES
Clinical And Patient-Reported Outcomes Of Arthroscopic Repair Versus Reconstruction Of The Cruciate Ligaments In The Multiligamentous Injured Knee ePoster Presentation Sebastian Rilk, MD, UNITED STATES Gabriel C Goodhart, BsC, UNITED STATES Kurt S. Holuba, BA, UNITED STATES Harmen D. Vermeijden, MD, UNITED STATES Robert O'Brien, MHS, PA-C, UNITED STATES Jelle P. van der List, MD, PhD, NETHERLANDS Gregory S. Difelice, MD, UNITED STATES
Patellar Tendon Autograft is Associated with Difficulty Kneeling but Does Not Result in a More Painful or Symptomatic Knee Compared to Hamstring Tendon Autograft after Anterior Cruciate Ligament Reconstruction: Results from the New Zealand ACL Registry ePoster Presentation Richard Rahardja, MBChB, BMedSc(Hons), NEW ZEALAND Hamish Love, FRACS, NEW ZEALAND Mark G. Clatworthy, FRACS, NEW ZEALAND Simon W. Young, MD, FRACS, NEW ZEALAND
Return to Sports in Anterior Cruciate Ligament Reconstruction Revision Surgery ePoster Presentation David H. Figueroa, MD, CHILE Maria Loreto Figueroa Berrios, MD, CHILE Alexandra Feuereisen, MD, CHILE Javier Ignacio González, MD, CHILE Rafael Calvo, MD, CHILE
The PCL-PCA Angle: A New Simple and Reliable MRI Method to Describe Anterior Tibial Translation in ACL-Deficient Knees ePoster Presentation Romain Seil, MD, Prof., LUXEMBOURG Renaud Siboni, MD, PhD student, FRANCE Charles Pioger, MD, FRANCE Caroline Mouton, PhD, LUXEMBOURG
Comparison Outcome of Home Based Versus Supervised Physiotherapy Rehabilitation Post Anterior Cruciate Ligament (ACL) Reconstruction in Recreational Athletes : A Randomised and Single Blind Study ePoster Presentation Muhammad Rajaei Ahmad, MBBS, Master of Medicine (Orthopaedics), MALAYSIA Muzaffar Tengku Shihabudin, M.Med (Ortho), MALAYSIA
Does Contamination During Harvesting as Well As During Suture Preparation and Manipulation of the Hamstrings Graft for Anterior Cruciate Ligament Reconstruction Correlates With Postoperative Infection? ePoster Presentation Stefanos Christos Papageorgiou, MD, GREECE Tilemachos Papageorgiou, MD, GREECE Errikos Petkidis, Md , GREECE Christos D. Papageorgiou, MD, PhD, GREECE
Adhesion Between the Anterior Cruciate Ligament Grafts and the Transverse Ligament of the Menisci: An effect of Arthroscopic Release ePoster Presentation Masashi Kusano, MD, PhD, JAPAN Keisuke Kita, MD, PhD, JAPAN Ryohei Uchida, MD, PhD, JAPAN Yukiyoshi Toritsuka, MD, PhD, JAPAN
Age-Related Microstructural Changes In Semitendinosus and Quadriceps Tendons ePoster Presentation Junsuke Nakase, MD, PhD, JAPAN Kazuki Asai, JAPAN Mitsuhiro Kimura, JAPAN Rikuto Yoshimizu, JAPAN Tomoyuki Kanayama, MD, JAPAN Yusuke Yanatori, MD, JAPAN Hiroyuki Tsuchiya, JAPAN
Contralateral ACL Rupture is More Common than ACL Graft Rupture in Australian Netballers After ACL Reconstruction ePoster Presentation Conor Honeywill, MD, B. Phty, AUSTRALIA Lucy J. Salmon, PhD, AUSTRALIA Leo A. Pinczewski, MBBS, FRACS, FAOA, AUSTRALIA Keran Sundaraj, MBBS MCs (Trauma) FRACS FAOA, AUSTRALIA Justin P. Roe, FRACS, A/Prof., AUSTRALIA
Ideal Combination Of Anatomic Tibial And Femoral Tunnel Positions for Single-Bundle ACL Reconstruction ePoster Presentation Kyoung-Ho Yoon, MD, PhD, Prof., KOREA, REPUBLIC OF Cheol Hee Park, MD, PhD, KOREA, REPUBLIC OF Sang-Gyun Kim, MD, PhD, KOREA, REPUBLIC OF Jae-Young Park, MD, KOREA, REPUBLIC OF Yoon-Seok Kim, MD, KOREA, REPUBLIC OF Hee Sung Lee, MD, KOREA, REPUBLIC OF Sung Hyun Hwang, MD, KOREA, REPUBLIC OF Dae Keun Suh, MD, PhD, KOREA, REPUBLIC OF Bo Seung Bae, MD, KOREA, REPUBLIC OF
Comparison of Clinical Outcomes between a Bone-Patellar Tendon-Bone and Quadriceps Tendon-Bone Autografts in Anatomic Rectangular Tunnel Anterior Cruciate Ligament Reconstruction ePoster Presentation Kazunori Shimomura, MD, PhD, Prof., JAPAN Yasukazu Yonetani, MD, PhD, JAPAN Ayaka Tanaka, MD, JAPAN Akira Tsujii, MD, PhD, JAPAN Masayuki Hamada, MD, JAPAN
The Relationship Between Preoperative Static Anterior Tibial Subluxation and Graft Maturation on MRI After Double-Bundle Anterior Cruciate Ligament Reconstruction ePoster Presentation Shigehiro Asai, MD, JAPAN Hideaki Fukuda, MD, JAPAN Takahiro Ogura, MD, JAPAN Kenji Takahashi, MD, PhD, JAPAN
Changing the ACL Reconstruction Algorithm from Transtibial Hamstring to Transportal Patellar Tendon Is Associated With a More Physiological Knee Laxity At 5-To-10 Year Follow-Up, But Maintaining Activity Levels Remains A Greater Challenge ePoster Presentation Iftach Hetsroni, MD, Associate Prof., ISRAEL Eyal Arami, MD, ISRAEL Guy Maoz, MD, ISRAEL Niv Marom, MD, ISRAEL Nissim Ohana, MD, ISRAEL Gideon Mann, MD, Prof., ISRAEL
A Retrospective Study of Prevalence of Intra-Articular Comorbidities Associated with ACL Tear and its Relationship with Patient-Age and Chronicity of the ACL Tear ePoster Presentation Vishwesh Devendrasinh Chudasama, M.S. (ORTHO), INDIA Vishvas Modi, M.S. (ORTHO), INDIA Deepak Goyal, MBBS, MS(Ortho), DNB(Ortho), Prof, INDIA
Sex-Based Difference of the Most Common Autograft Sources for ACL Reconstruction Measured on Knee MRI ePoster Presentation Giovanna Medina, MD, MSc, PhD, UNITED STATES Maria Virginia Velasquez-Hammerle, MD, UNITED STATES Miho J. Tanaka, MD, PhD, UNITED STATES
Uncommonly Considered Predisposing Anatomic Risk Factor for Anterior Cruciate Ligament (ACL) Injury: Recognition and Possible Rehabilitation Potential for Prevention ePoster Presentation Mujeeb Ashraf, FRCS, MCh,FEBTS, SAUDI ARABIA Hatem Al-Harbi, FRCSC, SAUDI ARABIA
Comparing Safety and Physical Activity Profiles of Institutional Standard of Care Versus Arthroscopic Electrocautery Approaches for ACL Reconstruction ePoster Presentation Claire Giachino, BA, UNITED STATES Hannah Rossing, BS, UNITED STATES David Howell, PhD, UNITED STATES Curtis D. Vandenberg, MD, UNITED STATES Jay C. Albright, MD, UNITED STATES
Failure Rates and Complications with Multiple-Revision Anterior Cruciate Ligament Reconstruction: Comparison of Anatomic Femoral Tunnel and Over The Top Technique ePoster Presentation Emre Anıl Özbek, MD, TURKEY Philipp W. Winkler , MD , GERMANY Ehab M Nazzal, MD, UNITED STATES Balint Zsidai, HUNGARY Nicholas P Drain, MD, UNITED STATES Janina Kaarre, MD, MSc, UNITED STATES Andrew Sprague, PT, PhD, DPT, UNITED STATES Bryson P. Lesniak, MD, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES
Epidemiological, Clinical and Radiological Features of ACL Aplasia: A Review of the Literature ePoster Presentation Michele Dell’Orfano, MD, ITALY Paolo Petitti, ITALY Niccolò Salvatelli, MD, ITALY Pier Paolo Mariani, MD, Prof, ITALY
Quad Versus Patella Tendon Autograft for Anterior Cruciate Ligament Reconstruction In Young Athletes ePoster Presentation Cory Riccio, MD, UNITED STATES Nathan Fackler, MD, UNITED STATES Christopher M Kuenze, PhD, UNITED STATES Tarun Vippa, BS, UNITED STATES Sarah Powell, MD, UNITED STATES Rachel E Cherelstein, BS, UNITED STATES Edward S. Chang, MD, UNITED STATES
Decreased Time Between Injury and Surgery and Increased Injury Severity Predict Motion Loss After Multiligament Knee Injury, but Are Only Part of the Picture ePoster Presentation Cale A. Jacobs, PhD, UNITED STATES Kathleen Poploski, PhD, UNITED STATES Caitlin Conley, PhD, UNITED STATES Austin V Stone, MD, PhD, UNITED STATES Darren L. Johnson, MD, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES James J. Irrgang, PT, PhD, FAPTA, UNITED STATES
Spin in the Abstracts of Meta-Analyses and Systematic Reviews: Quadriceps Tendon Graft for Anterior Cruciate Ligament Reconstruction ePoster Presentation Matthew T Gulbrandsen, MD, UNITED STATES Taha Taka, BS, UNITED STATES Joshua Peterson, BS, UNITED STATES Jun Ho Chung, MD, UNITED STATES Hasan Syed, MD Austin V Stone, MD, PhD, UNITED STATES John Xerogeanes, MD, UNITED STATES Joseph N. Liu, MD, UNITED STATES
Lower Socioeconomic Status Adversely Affects Timing of Care and Rate of Re-Injury Following Anterior Cruciate Ligament Reconstruction ePoster Presentation Eduardo J Natal-Albelo, MD, UNITED STATES Rachel E Cherelstein, BS, UNITED STATES Christopher M Kuenze, PhD, UNITED STATES Andrew Curley, MD, UNITED STATES Blake M. Bodendorfer, MD, UNITED STATES Mark Hopkins, MD, UNITED STATES Christine Conroy, MD, UNITED STATES Caroline Fryar, MD, UNITED STATES David X. Wang, MD, UNITED STATES Edward S. Chang, MD, UNITED STATES
The Statistical Fragility Of Clinical Trials Comparing Bone-Patellar Tendon-Bone Versus Hamstring Tendon Autografts In Anterior Cruciate Ligament Reconstruction Surgery: A Systematic Review ePoster Presentation Jeffrey Okewunmi, BS, UNITED STATES Zakaria Chakrani, BA, UNITED STATES John K Cordero, MD, UNITED STATES Robert L Parisien, MD, UNITED STATES
Comparing the Accuracy of Tunnel Placement and Patient Reported Outcome Measures when Doing Arthroscopic ACL Reconstruction With and Without Indigenously Designed Grid and Image Intensifier ePoster Presentation Sudeep Kumar, MS (Orthopaedics), INDIA
Multiple High Strength Sutures Yield Better Biomechanical Properties Comparing With Conventional Suture Tape For Anterior Cruciate Ligament Repair Augmentation ePoster Presentation Thun Itthipanichpong, MD, THAILAND Puchong Kulrat, MD, THAILAND Napatpong Thamrongskulsiri, MD, THAILAND Thanathep Tanpowpong, MD, THAILAND Chanyaphan Virulsri, PhD, THAILAND Pairat Tangpornprasert, PhD, THAILAND Somsak Kuptniratsaikul, MD, THAILAND
“It’s Just My Knee”: The Role of Resilience and Reframing on Young Athlete’s Quality of Life Following ACL Injury ePoster Presentation Hana Marmura, BSc, CANADA Dianne M. Bryant, PhD, CANADA Alan Getgood, MD, FRCS(Tr&Orth), DipSEM, CANADA Fiona Webster, PhD, CANADA
Changes in Cross-Sectional Area After the Anatomic ACL Reconstruction with Hamstring Tendon or Bone-atellar tendon autografts. ePoster Presentation Kazutaka Kinugasa, MD, PhD, JAPAN Masayuki Hamada, MD, JAPAN Yasukazu Yonetani, MD, PhD, JAPAN Akira Tsujii, MD, PhD, JAPAN Tomohiko Matsuo, MD, PhD, JAPAN Yoshinari Tanaka, MD, PhD, JAPAN Yuta Tachibana, M.D., Ph.D., JAPAN Ryohei Uchida, MD, PhD, JAPAN Konsei Shino, MD, PhD, JAPAN
Tibial Tunnel Aperture Migration After Anatomical Rectangular Tunnel ACL Reconstruction using Bone-Patellar Tendon-Bone Autografts ePoster Presentation Ryo Murakami, MD, JAPAN Shuji Taketomi, MD, PhD, JAPAN Ryota Yamagami, MD, JAPAN Kenichi Kono, MD, PhD, JAPAN Kohei Kawaguchi, MD, JAPAN Tomofumi Kage, JAPAN Takahiro Arakawa, MD, JAPAN Sakae Tanaka, MD, PhD, JAPAN
Posterior Tibial Plateau Compression Fractures Coinciding with ACL Injury: Means of Identification, Treatment Decision-Making Process and Clinical Relevance of Proposed MRI-Based Classification System ePoster Presentation Robert Smigielski, MD, PhD, POLAND Beata Ciszkowska-Lyson, PhD, POLAND Aleksandra Zielinska, MA, BSc, POLAND Christian Fink, MD, Prof., AUSTRIA Mirco Herbort, MD, Prof., GERMANY
ACL Graft Tear or Contralateral ACL Tear: Which is Worse??? ePoster Presentation Robert A Magnussen, MD, MPH, UNITED STATES Yuxuan Jin, MS, UNITED STATES Kurt Paul Spindler, MD, UNITED STATES
Return To Play And Pattern Of Injury In A Consecutive Case Series Of Elite UEFA Football Player Following Anterior Cruciate Ligament Rupture ePoster Presentation Luca Farinelli, MD, ITALY Elisabeth Abermann, MD, AUSTRIA Amit Meena, MBBS, MS, DNB, INDIA Christian Fink, MD, Prof., AUSTRIA
High Return to Sport Rate and Few Re-Ruptures at Long Term in Professional Footballers After Anterior Cruciate Ligament Reconstruction with Hamstrings ePoster Presentation Tommaso Bonanzinga, MD, PhD, ITALY Alberto Grassi, PhD, ITALY Gian Andrea Lucidi, MD, ITALY Luca Macchiarola, MD, ITALY Marianna Viotto, ITALY Stefano Zaffagnini, MD, Prof., ITALY
Comparable Short-Term Clinical Outcomes In Rectangular-Tunnel Anterior Cruciate Ligament Reconstruction Using Quadriceps Tendon-Patellar Bone Autograft Over Round-Tunnel Reconstruction ePoster Presentation Do Weon Lee, MD, MS, KOREA, REPUBLIC OF Sang Yoon Kim, MD, KOREA, REPUBLIC OF Duhyun Ro, MD, Prof. , KOREA, REPUBLIC OF Myung Chul Lee, MD, PhD, Prof., KOREA, REPUBLIC OF Hyuk-Soo Han, MD, PhD, KOREA, REPUBLIC OF
Clinical and Social Predictors Of Surgical Treatment for ACL Injuries ePoster Presentation Miho J. Tanaka, MD, PhD, UNITED STATES Harrison Hubbell, BA, UNITED STATES Nadine Jackson McCleary, MD, MPF, UNITED STATES Endel John Orav, PhD, UNITED STATES
Is Asymmetry of the Medial and Lateral Posterior Femoral Condyles Associated With ACL Rupture? A Case-Control Study of Pediatric Patients ePoster Presentation Nicolas Pascual-Leone, BA, UNITED STATES Danielle E Chipman, BS, UNITED STATES Danielle S Gorelick, NP, UNITED STATES Peter D. Fabricant, MD, MPH, UNITED STATES Russell F. Warren, MD, UNITED STATES Douglas Mintz, MD, UNITED STATES Daniel W. Green, MD, MS, UNITED STATES
The Effect of Delaying Anterior Cruciate Ligament Reconstruction More Than 3 or 6 Months on Revision Rates and Knee Stability After 2 Years of Follow-up ePoster Presentation Helena Amstrup Jensen, BSc, DENMARK Torsten G. Nielsen, BSc, DENMARK Martin Lind, MD, PhD, Prof., DENMARK
Anatomical Ribbon ACL Reconstruction: a 4-Year Follow-Up On. Evaluation of Surgery Outcomes Including Physical Examination, and Post-Op MRI and CT Scans Assessment ePoster Presentation Robert Smigielski, MD, PhD, POLAND Daniel Kopko, MD, POLAND Beata Ciszkowska-Lyson, PhD, POLAND Aleksandra Zielinska, MA, BSc, POLAND Mirco Herbort, MD, Prof., GERMANY Christian Fink, MD, Prof., AUSTRIA
Second-look Arthroscopic Evaluation and Clinical Outcomes After Anatomic Double Bundle Anterior Cruciate Ligament Reconstruction: Comparison of Different Knee Flexion Angles During Tibial Graft Fixation ePoster Presentation Yasunari Oniki, MD, PhD, JAPAN Taiki Murakami, JAPAN Eiichi Nakamura, MD, PhD, JAPAN
Adductor Canal Block is Superior to Femoral Nerve Block for Early Postoperative Pain Relief after Single Bundle Anterior Cruciate Ligament Reconstruction with Hamstring Autograft ePoster Presentation Takeshi Oshima, MD, PhD, JAPAN Junsuke Nakase, MD, PhD, JAPAN Kengo Shimozaki, MD, JAPAN Rikuto Yoshimizu, JAPAN Mitsuhiro Kimura, JAPAN Tomoyuki Kanayama, MD, JAPAN Yusuke Yanatori, MD, JAPAN Hiroyuki Tsuchiya, JAPAN
Low Revision Risk In Primary Anterior Cruciate Ligament Reconstruction With Allograft In The Masters Athlete ePoster Presentation Ian DeYoe Engler, MD, UNITED STATES Audrey Y. Chang, BA, UNITED STATES Janina Kaarre, MD, MSc, UNITED STATES Michael Shannon, BS, UNITED STATES Andrew Curley, MD, UNITED STATES Clair Smith, MSc, UNITED STATES Jonathan D Hughes, MD, UNITED STATES Bryson P. Lesniak, MD, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES
Implant-Free Reconstruction Techniques For Ligaments Injuries Of The Knee – Cost-Effective Innovative Alternatives For The Traditional Techniques ePoster Presentation Girinivasan Chellamuthu, MBBS, MS Ortho, FIOT, FASM, INDIA Santosh Sahanand Kulasekaran, MBBS,MS(ortho), INDIA David V. Rajan, MS(Orth), MNAMS(Orth), FRCS(G), INDIA
No Difference in Clinical Outcomes Between Aperture And Suspensory Femoral-Sided Fixation Following Anterior Cruciate Ligament Reconstruction with Bone-Patellar Tendon-Bone Autograft ePoster Presentation Garrison Hughes, BS, UNITED STATES Cory Riccio, MD, UNITED STATES Tarun Vippa, BS, UNITED STATES Christopher M Kuenze, PhD, UNITED STATES Rachel E Cherelstein, BS, UNITED STATES Mitchell A Nader, , UNITED STATES Laura Keeling, MD, UNITED STATES Theodore N Rudic, BS, UNITED STATES Kory BD Pasko, BS, UNITED STATES Edward S. Chang, MD, UNITED STATES

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No Single Dominant Risk Factor for Noncontact ACL Injury: Key Thresholds and Relative Contributions of Knee Geometry and Anterior-Posterior Laxity

No Single Dominant Risk Factor for Noncontact ACL Injury: Key Thresholds and Relative Contributions of Knee Geometry and Anterior-Posterior Laxity

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No Single Dominant Risk Factor for Noncontact ACL Injury: Key Thresholds and Relative Contributions of Knee Geometry and Anterior-Posterior Laxity

No Single Dominant Risk Factor for Noncontact ACL Injury: Key Thresholds and Relative Contributions of Knee Geometry and Anterior-Posterior Laxity

Introduction

Methods

Results

Discussion