The role of the anterior cruciate ligament (ACL) in knee biomechanics in vivo and under weight-bearing is still unclear. The purpose of this study was to compare the tibiofemoral kinematics of ACL-deficient knees to healthy contralateral ones during the execution of weight-bearing activities.

Methods

Eight patients with isolated ACL injury and healthy contralateral knees were included in the study. Patients were asked to perform a single step forward and a single leg squat first with the injured knee and then with the contralateral one. Knee motion was determined using a validated model-based tracking process that matched subject-specific MRI bone models to dynamic biplane radiographic images, under the principles of Roentgen stereophotogrammetric analysis (RSA). Data processing was performed in a specific software developed in Matlab.

Results

Statistically significant differences (p < 0.05) were found for single leg squat along the frontal plane: ACL-deficient knees showed a more varus angle, especially at the highest knee flexion angles (40°–50° on average), compared to the contralateral knees. Furthermore, ACL-deficient knees showed tibial medialization along the entire task, while contralateral knees were always laterally aligned. This difference became statistically relevant (p < 0.05) for knee flexion angles included between 0° and about 30°.

Conclusion

ACL-deficient knees showed an abnormal tibial medialization and increased varus angle during single leg squat when compared to the contralateral knees. These biomechanical anomalies could cause a different force distribution on tibial plateau, explaining the higher risk of early osteoarthritis in ACL deficiency. The clinical relevance of this study is that also safe activities used in ACL rehabilitation protocols are significantly altered in ACL deficiency.

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Predicting Subjective Failure of ACL Reconstruction: A Machine Learning Analysis of the Norwegian Knee Ligament Register and Patient Reported Outcomes Award Winner 5 minutes R. Kyle Martin, MD, FRCSC, UNITED STATES Solvejg Wastvedt, BA, UNITED STATES Ayoosh Pareek, MD, UNITED STATES Andreas Persson, MD, PhD, NORWAY Havard Visnes, MD, PT, PhD, NORWAY Anne Marie Fenstad, MSc, NORWAY Gilbert Moatshe, MD, PhD, NORWAY Julian Wolfson, PhD, UNITED STATES Lars Engebretsen, MD, PhD, NORWAY
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Does In Vivo Kinematics Following Acl Reconstruction With Or Without Lateral Extraarticular Tenodesis Correlate With Preoperative Quantitative Pivot Shift? Abstract Presentation 5 minutes Christopher M. Gibbs, MD, UNITED STATES Philipp Wilhelm Winkler, MD, Assoc. Prof., AUSTRIA Jonathan D Hughes, MD, PhD, UNITED STATES Adam J. Popchak, DPT, PhD, UNITED STATES Daisuke Chiba, MD, PhD, JAPAN Bryson P. Lesniak, MD, UNITED STATES William Anderst, PhD, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES
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PSM: Pivot Shift Meter Cellphone Application for Classifying ACL Injuries Abstract Presentation 5 minutes Edmundo Berumen Nafarrate, PhD, Prof., MEXICO Carlos Alejandro Vega Najera, MD, MEXICO Joel Alejandro Cabral, MD, MEXICO Luis Sigala Gonzalez, Eng, MEXICO Ivan Ramos Moctezuma, Eng, MEXICO Carlos Leal, MD, Prof., COLOMBIA Jesus Javier Tonche, MD, MEXICO Avril Pérez Fontes, MD, MEXICO Fatima Quintana Trejo, Eng, MEXICO
Early ROM exercise after ACLR with hamstring autograft does not cause joint laxity : A Prospective Randomized Controlled Trial, 2 years follow up ePoster Presentation Jeong-Ku Ha, MD, phD, Prof, KOREA, REPUBLIC OF Kyu Sung Chung, MD, PhD, Prof., KOREA, REPUBLIC OF
Analysis Of The Blood Supply To The Femoral Attachment Of The Anterior Cruciate Ligament After Acl Injury Abstract Presentation 4 minutes Jedrzej Jerzy Lesman, PhD MD, POLAND Marcin E. Domzalski, MD, Prof., POLAND Krzysztof Nowak, MD, PhD, POLAND Sebastian Zygmunt Żabierek, PhD, POLAND Radoslaw Grabowski, MD, POLAND Ilona Wagner-Olszewska, MD, POLAND
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Quadriceps Tendon Vs. Hamstring Tendon Autograft In Primary Anterior Cruciate Ligament Reconstruction: A Matched-Pairs Study With A Mean Follow-Up Of 6.5 Years Award Winner 5 minutes Armin Runer, PD MD, GERMANY Aline Suter, MD, AUSTRIA Tommaso Roberti di Sarsina, MD, ITALY Caroline Hepperger, PhD, AUSTRIA Peter Gföller, MD, AUSTRIA Christian Hoser, MD, AUSTRIA Robert Csapo, PhD, AUSTRIA Christian Fink, MD, Prof., AUSTRIA
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Pre-Operative Tunnel Widening Does Not Significantly Influence The Outcomes Of A Single-Stage Only Approach To Revision Acl Reconstruction: An Analysis Of 409 Consecutive Patients Abstract Presentation 5 minutes Adnan Saithna, MD, FRCS, UNITED STATES Charles Pioger, MD, FRANCE Johnny Rayes, MD, MSc, FEBOT, CANADA Ibrahim Haidar, MD, LEBANON Thomas Fradin, MD, FRANCE Cédric Ngbilo, MD, SWITZERLAND Thais Dutra Vieira, MD, FRANCE Etienne Cavaignac, MD,PhD, FRANCE Bertrand Sonnery-Cottet, MD, PhD, FRANCE
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Acl - Pcl Fixation Sequence During Multi-Ligament Knee Reconstruction Does Not Affect Knee Laxity Abstract Presentation 6 minutes Carola F. van Eck, MD, PhD, FAAOS, UNITED STATES Aly Maher Fayed, MD, EGYPT Ryo Kanto, MD, JAPAN Taylor M. Price, MS, UNITED STATES Michael Dinenna, BS, UNITED STATES Monica A. Linde, MSIE, RN, UNITED STATES Patrick J. Smolinski, PhD, UNITED STATES
Effect Of Graft Choice On 6-Year Outcomes Of Revision Anterior Cruciate Ligament Reconstruction In The Multicenter ACL Revision Study (Mars) Cohort Abstract Presentation 6 minutes Rick W. Wright, MD, UNITED STATES
Local Anaesthetic Infiltration (Lia) Is Equally Effective As Adductor Nerve Blocks For Pain Relief In Anterior Cruciate Ligament (Acl) Reconstructions. Abstract Presentation 8 minutes Mohammad Abou Salhab, MBChB, MSc, UNITED KINGDOM Sonal Sonwalkar , FRCA, UNITED KINGDOM Sanjeev Anand, MD, UNITED KINGDOM Martin Stone, MD, UNITED KINGDOM
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Coach Education Improves Implementation Of ACL Injury Prevention Programs: A Cluster-Randomized Controlled Trial Abstract Presentation 5 minutes Daphne Ling, PhD, MPH, TAIWAN Caroline Boyle, UNITED STATES Brandon Schneider, MS, UNITED STATES Joseph Janosky, DrPHc, MS, PT, ATC, UNITED STATES James Kinderknecht, UNITED STATES Robert G. Marx, MD, UNITED STATES
Creating A Crosswalk For Knee Outcomes After ACLR From The KOOS(5) To The IKDC-SKF Abstract Presentation 6 minutes Jessica L. Johnson, DPT, PhD, UNITED STATES Aaron Boulton, PhD, UNITED STATES Kurt Paul Spindler, MD, UNITED STATES Laura J. Huston, MS, UNITED STATES Tim Spalding, FRCS(Orth), UNITED KINGDOM Laura Asplin, UNITED KINGDOM May Arna Risberg, PT, PhD, NORWAY Lynn Snyder-Mackler, PT, ScD, FAPTA, UNITED STATES
Predicting Subsequent Revision ACL Reconstruction: A Machine Learning Analysis of the Norwegian Knee Ligament Register Abstract Presentation 5 minutes R. Kyle Martin, MD, FRCSC, UNITED STATES Solvejg Wastvedt, BA, UNITED STATES Ayoosh Pareek, MD, UNITED STATES Andreas Persson, MD, PhD, NORWAY Havard Visnes, MD, PT, PhD, NORWAY Anne Marie Fenstad, MSc, NORWAY Gilbert Moatshe, MD, PhD, NORWAY Julian Wolfson, PhD, UNITED STATES Lars Engebretsen, MD, PhD, NORWAY
Value, Limitations And Recommendations For Use Of Metal-Reduction Knee MRI Sequences Following Anterior Cruciate Ligament Reconstruction Abstract Presentation 6 minutes Brandon Zhao, MD, CANADA Nabil Khan, MBChB, MMED, FCS Orth, CANADA Mark F. Sommerfeldt, MD, CANADA Anukul Panu, MD, CANADA Jacob L Jaremko, MD, PhD, CANADA Catherine May Ting Hui, MD, FRCSC, CANADA
Predicting Patient Lost to Follow-up in the STABILITY 1 Study: A Multi-centre, International, Randomized Controlled Trial of Young, Active Patients Undergoing Anterior Cruciate Ligament Reconstruction Abstract Presentation 6 minutes Andrew Firth, PhD, CANADA Dianne M. Bryant, PhD, CANADA Andrew Johnson, PhD, CANADA Stability Study Group, CANADA Alan Getgood, MD, FRCS(Tr&Orth), DipSEM, QATAR
The Effect of Lateral Extra-Articular Tenodesis on Medial and Lateral Menisci Loading in Response To Simulated Tests of the Pivot Shift and Anterior Laxity Abstract Presentation 6 minutes Niv Marom, MD, ISRAEL Hamid Jahandar, BS, UNITED STATES Zaid Zayyad, MD, MS, UNITED STATES thomas fraychineaud, MD, UNITED STATES Herve Ouanezar, MD, UNITED ARAB EMIRATES Ronak M. Patel, MD, UNITED STATES Carl W Imhauser, PhD, UNITED STATES Thomas L. Wickiewicz, MD, UNITED STATES Andrew D. Pearle, MD, UNITED STATES Danyal H. Nawabi, MD, FRCS(Orth), UNITED STATES
The Effect Of Lateral Extraarticular Tenodesis On In Vivo Cartilage Contact In Combined Anterior Cruciate Ligament Reconstruction ePoster Presentation Kyohei Nishida , MD, PhD, JAPAN Tom Gale, MS, UNITED STATES Daisuke Chiba, MD, PhD, JAPAN Felipe Martin Suntaxi, MS, UNITED STATES Bryson P. Lesniak, MD, UNITED STATES Freddie H. Fu, MD, UNITED STATES William Anderst, PhD, UNITED STATES Volker Musahl, MD, Prof., UNITED STATES
Return To Sports After Paediatric Anterior Cruciate Ligament Reconstruction (ACLR): Normal Population Vs An ACLR Cohort Abstract Presentation 6 minutes Alexander S. Nicholls, MSc, FRACS, AUSTRALIA Jillian Lee, BHB, MBChB, FRACS (Ortho), NEW ZEALAND Yoong Lim, BEng, PhD, AUSTRALIA Quang Dao, FRACS, AUSTRALIA
Impingement Due to Graft Buckling Is More Prevalent after ACL Reconstructions with an Adjustable-Loop Compared to a Fixed-Loop Abstract Presentation 5 minutes Julian De Rover, NETHERLANDS Inge Van Den Akker-Scheek, PhD, NETHERLANDS Hugo Christiaan van der Veen, MD, PhD, NETHERLANDS
Return To Elite Sport After ACL Reconstruction In 376 'Professional' Athletes Abstract Presentation 5 minutes Kyle Borque, MD, UNITED STATES Mary Jones, MSc, Grad. Dip. Phys., UNITED KINGDOM Ganesh Balendra, MBBS, AUSTRALIA Lukas Willinger, MD, GERMANY Vitor Hugo Pinheiro, MD, UNITED KINGDOM Andy Williams, MBBS, FRCS(Orth), FFSEM(UK), UNITED KINGDOM
Risk Factor Analysis for Graft Failure after Anterior Cruciate Ligament Reconstruction with or without mLET Abstract Presentation 7 minutes Filip R Hendrikx, MD, BELGIUM Koen Lagae, MD, BELGIUM Annemieke Van Haver, PhD, MSc, BELGIUM Peter Verdonk, MD, PhD, BELGIUM
Outcomes Following Anterior Cruciate Ligament Reconstruction in Young Patients: An Observational Study. ePoster Presentation Kunal Mohan, MB MCh MRCSI, IRELAND David Cooper, MB MRCSI, IRELAND Niall McGoldrick, MB MCh FRCS (Tr & Orth), IRELAND Martin Davey, MB MCh MRCSI, IRELAND Megan Diack, MBCHB, MRCSI, MCh, IRELAND Paula McQuail, MB FRCSI, IRELAND Fintan J. Shannon, FRCS (Tr/Orth), IRELAND
Why, When and Who Fails Non-Operative Treatment of Anterior Cruciate Ligament Injury – An Exploratory Analysis of the COMPARE Trial Abstract Presentation 5 minutes Sabine van der Graaff, MD, NETHERLANDS Duncan E. Meuffels, MD, PhD, NETHERLANDS Sita Bierma-Zeinstra, MD, NETHERLANDS Eline van Es, MSc, NETHERLANDS Jan Verhaar, MD, PhD, Prof., NETHERLANDS Vincent Eggerding, MD, NETHERLANDS Max Reijman, PhD, NETHERLANDS
Nerve injury during anterior cruciate ligament reconstruction: A comparison between patellar and hamstring tendon grafts harvest Abstract Presentation 5 minutes Jonathan Singer, MD, ISRAEL Ehud Rath, Prof., ISRAEL Mustafa Yassin, MD, ISRAEL Shlomo Bronak, MD, ISRAEL Barak Haviv, MD, ISRAEL
Ligamentous Laxity, Male Sex, Chronicity, Meniscus Injury And Posterior Tibial Slope Are Associated With A High-Grade Pre-Operative Pivot Shift: A Post Hoc Analysis Of The Stability Study Abstract Presentation 6 minutes Lachlan Batty, FRACS, AUSTRALIA Andrew Firth, PhD, CANADA Gilbert Moatshe, MD, PhD, NORWAY Dianne M. Bryant, PhD, CANADA S. Mark A. Heard, MD, FRCS, CANADA Robert G. McCormack, MD, CANADA Alex Rezansoff, MD, FRCSC, CANADA Devin Clarke Peterson, MD, FRCSC, Dip Sport Med, CANADA Davide Bardana, MD, CANADA Peter B. MacDonald, MD, FRCS, Dip Sport Med, CANADA Tim Spalding, FRCS(Orth), UNITED KINGDOM Alan Getgood, MD, FRCS(Tr&Orth), DipSEM, QATAR
Xenograft For Anterior Cruciate Ligament Reconstruction Was Associated With High Graft Processing Infection. Abstract Presentation 6 minutes Willem M. van der Merwe, MBChB, FCS(SA)Ortho, SOUTH AFRICA Martin Lind, MD, PhD, Prof., DENMARK Peter Faunoe, MD, DENMARK Kees van Egmond, MD, NETHERLANDS Stefano Zaffagnini, MD, Prof., ITALY Maurilio Marcacci, MD, ITALY Ramon Cugat Bertomeu, MD, PhD, SPAIN Rene E. Verdonk, Prof Em, MD, PhD, BELGIUM Ernique Ibanez, MD, PhD, SPAIN Giulio Maria Marcheggiani Muccioli, MD, PhD, Associate Professor, ITALY
Combined Reconstruction Of The Medial Collateral Ligament And Anterior Cruciate Ligament Using Ipsilateral Semitendinosus Tendon And Opposite Semitendinosus With Ipsilateral Gracilis Tendon: A Minimum One-Year Follow-Up Study In NITOR.Dhaka,Bnagladesh Abstract Presentation 4 minutes Dibakar Sarkar, MS(Orthopaedic surgery),FACS(USA),AO fellow(Bangko, BANGLADESH
Relationship Between Posterior Tibial Slope And Sagittal Plane Mechanics During Jump Landing After Anterior Cruciate Ligament Reconstruction Abstract Presentation 6 minutes Robert A. Duerr, MD, UNITED STATES Jennifer Perry, MS, UNITED STATES Robert A Magnussen, MD, MPH, UNITED STATES David C. Flanigan, MD, UNITED STATES Benjamin Ormseth, BS, UNITED STATES Robert Siston, PhD, UNITED STATES Andrew Garrone, MD, UNITED STATES Christopher C. Kaeding, MD, UNITED STATES Laura C. Schmitt, PT, PhD, UNITED STATES
Negative Effects Of Delayed Anterior Cruciate Ligament Reconstruction On Associated Injuries And Knee Laxity Abstract Presentation 6 minutes Riccardo Cristiani, MD, PhD, SWEDEN Per-Mats Janarv, MD, PhD, Associate Prof., SWEDEN Bjorn Engstrom, MD, PhD, Assoc. Prof., SWEDEN Gunnar Edman, MD, PhD, Prof., SWEDEN Magnus Forssblad, SWEDEN Anders Stalman, MD, PhD, Professor, SWEDEN
The Outcome Of Non-circular (Rectangle, Oval) Femoral Tunnel ACL Reconstruction, Does It Improve The Outcome Of ACL Reconstruction Surgery? Abstract Presentation 6 minutes S. Ali Ghasemi, MD, UNITED STATES Joseph McCahon, DO, UNITED STATES Arthur R Bartolozzi, MD, UNITED STATES
A Comparison of Lower Limb Strength and Plyometric Ability in Athletes who underwent ACLR with Lateral Extra-Articular Ilio-Tibial Band Tenodesis when compared with Isolated ACLR Surgery. A Biomechanical Study. Abstract Presentation 7 minutes Bláithín Brady, BSc MSc , IRELAND Sarah Crosbie, BSc, IRELAND Neil Welch, BSc MSc PhD, IRELAND Mihai Vioreanu, MD, MCh, FFSEM, FRCSI(Tr&Orth), IRELAND
Contralateral versus ipsilateral quadriceps graft, for anterior cruciate ligament reconstruction. Abstract Presentation 6 minutes Franco Della Vedova, ARGENTINA Hernan Galan, MD, ARGENTINA Daniel A. Slullitel, MD, Prof., ARGENTINA
High Rate of Initially Overlooked Kaplan Fiber Complex Injuries in Patients With Isolated Anterior Cruciate Ligament Injury Abstract Presentation 5 minutes Ryan M Bell, BS, UNITED STATES Daniel P. Berthold, Association.-Prof., GERMANY Lukas Willinger, MD, GERMANY Matthew R. Levasseur, MD, UNITED STATES Daniel Marrero, MD, UNITED STATES Lukas Nawid Muench, MD, GERMANY Andreas B. Imhoff, MD, Prof. Emeritus, GERMANY Elmar Herbst, MD, PhD, GERMANY Mark P. Cote, PT, DPT, MSCTR, UNITED STATES Robert A. Arciero, MD, UNITED STATES Cory M. Edgar, MD, PhD, UNITED STATES
Bone Marrow Aspiration Concentrate Augmentation in Anterior Cruciate Ligament Hamstring Autograft Reconstruction: Clinical and Functional Outcomes of a Cohort Study Abstract Presentation 5 minutes David H. Figueroa, MD, CHILE Rodrigo Guiloff, MD, Prof, CHILE Sergio Arellano, MD, CHILE Alex Vaisman, MD, Prof., CHILE Francisco Figueroa, MD, CHILE Nicolas Zilleruelo, MD, CHILE Rafael Calvo, MD, CHILE

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Acl Deficiency Influences Medio-Lateral Tibial Alignment And Knee Varus–Valgus During In Vivo Activities

Acl Deficiency Influences Medio-Lateral Tibial Alignment And Knee Varus–Valgus During In Vivo Activities

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Acl Deficiency Influences Medio-Lateral Tibial Alignment And Knee Varus–Valgus During In Vivo Activities

Acl Deficiency Influences Medio-Lateral Tibial Alignment And Knee Varus–Valgus During In Vivo Activities

Purpose

Methods

Results

Conclusion

More ISAKOS 2021: Global Content