Summary: Patients with elevated posterior tibial slope >=12 degrees have increased knee angular velocity during a double-leg landing task when compared to patients with posterior slope < 12 degrees.

Objectives:
Increased posterior tibial slope (PTS) has been identified as a risk factor for anterior cruciate ligament (ACL) injuries and ACL reconstruction failure. The relationship between PTS and sagittal plane knee biomechanics (such as knee angular velocity) has not been evaluated. Prior work has identified that higher knee angular velocities are associated with faster peak ACL strains, which may have implications on risk of ACL graft rupture. The purpose of this study was to evaluate the relationship between PTS and sagittal plane mechanics during jump landing in a cohort of patients after ACL reconstruction. It was hypothesized that sagittal plane landing mechanics would differ between those with PTS >= 12 degrees compared to those with PTS < 12 degrees.

Methods

A cohort of patients who underwent primary, unilateral ACL reconstruction at a single institution were identified in a prospectively collected ACL database. At 2-years post-ACL reconstruction a follow-up visit was conducted to collect biomechanics data and patient reported outcome scores, including Marx Activity Score, International Knee Documentation Committee (IKDC) Score, and Knee Injury and Osteoarthritis Outcome Score (KOOS). Three-dimensional motion analysis data were collected during the initial landing phase of a bilateral drop vertical jump task. Lateral posterior tibial slope (LPTS) was measured on lateral knee radiographs of the injured knee. Biomechanical variables of interest included ground reaction forces and sagittal plane knee kinematic and kinetic variables on the reconstructed limb. Pearson correlations were calculated to evaluate the association between LPTS and biomechanical variables of interest (a=0.05). The cohort was categorized based on LPTS into low slope (PTS < 12 degrees) and high slope (PTS >= 12 degrees) groups. Demographic, outcomes, and biomechanics data were compared between the groups with independent samples t-tests (a=0.05).

Results

A total 29 patients with lateral radiographs for LPTS measurements and complete biomechanics data were included (17 females) with a mean age of 22.3 years (range 17 to 35 years). There were no significant differences in age, body mass index, Marx activity score, IKDC Score, or KOOS subscales between the high slope and low slope groups. The mean LPTS was 13.4 +/- 0.9 degrees and 8.7 +/- 1.2 degrees in the high slope and low slope groups respectively. During landing, higher involved knee angular velocity was associated with higher LPTS (r=0.43, p=0.02). Individuals with high LPTS had significantly higher involved knee angular velocity compared to patients with low LPTS.

Conclusion

At 2 years post-ACL reconstruction, there were no differences in activity or patient reported outcome scores in those with high or low LPTS. During a double-leg landing task, high LPTS is associated with higher involved knee angular velocity. Further investigation of the associations among anatomic considerations (such as PTS), knee mechanics, and ACL graft strain are needed to identify patients at higher risk of graft rupture and inform post-operative rehabilitation and discussions regarding graft failure risk.

PROSPECTIVE RANDOMIZED STUDY: Double-bundle against single-bundle ACL reconstruction using allografts Abstract Presentation 5 minutes Edmundo Berumen Nafarrate, PhD, Prof., MEXICO Carlos Alejandro Vega Najera, MD, MEXICO Joel Alejandro Cabral, MD, MEXICO Jesus Javier Tonche, MD, MEXICO Ivan Ramos Moctezuma, Eng, MEXICO Luis Sigala Gonzalez, Eng, MEXICO Avril Pérez Fontes, MD, MEXICO Fatima Quintana Trejo, Eng, MEXICO Carlos Leal, MD, Prof., COLOMBIA
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Acl Deficiency Influences Medio-Lateral Tibial Alignment And Knee Varus–Valgus During In Vivo Activities Abstract Presentation 3 minutes Piero Agostinone, MD, ITALY Stefano Di Paolo, Eng, ITALY Alberto Grassi, PhD, ITALY Marco Bontempi, ITALY Erika Pinelli, MsC, ITALY Laura Bragonzoni, Prof., ITALY Stefano Zaffagnini, MD, Prof., ITALY
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Contralateral versus ipsilateral quadriceps graft, for anterior cruciate ligament reconstruction. Abstract Presentation 6 minutes Franco Della Vedova, MD, ARGENTINA Hernan Galan, MD, ARGENTINA Daniel A. Slullitel, MD, Prof., ARGENTINA
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Higher Return To Pre-Injury Activity Levels Following ACL Reconstruction With Bone-Patellar Tendon-Bone Versus Hamstring Tendon Autograft In High Activity Patients: Results From The New Zealand ACL Registry Abstract Presentation 6 minutes Simon W. Young, MD, FRACS, NEW ZEALAND Richard Rahardja, MBChB, BMedSc(Hons), NEW ZEALAND Mark G. Clatworthy, FRACS, NEW ZEALAND Paul Monk, DPhil (Oxon), FRCS, NEW ZEALAND Hamish Love, FRACS, NEW ZEALAND
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
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
Combined ACL and Anterolateral Ligament Reconstruction Confers Significantly Improved Long Term Outcomes when Compared to Isolated ACL Reconstruction: A Matched-Pair Analysis Abstract Presentation 5 minutes Adnan Saithna, MD, FRCS, UNITED STATES Ibrahim Haidar, MD, FRANCE Johnny Rayes, MD, MSc, FEBOT, CANADA Thomas Fradin, MD, FRANCE Cédric Ngbilo, MD, SWITZERLAND Benjamin Freychet, MD, FRANCE Thais Dutra Vieira, MD, FRANCE Herve Ouanezar, MD, UNITED ARAB EMIRATES Bertrand Sonnery-Cottet, MD, PhD, FRANCE
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
Sex Related Outcomes Following Anterior Cruciate Ligament Reconstruction (Aclr): A Systematic Review and Meta-Analysis Abstract Presentation 5 minutes Anthony Charles Mok, BS, UNITED STATES Andrew J Fancher, BS, UNITED STATES Matthew L Vopat, MD, UNITED STATES Jordan Charles Baker, BS, UNITED STATES Armin Tarakemeh, BS, UNITED STATES Mary K. Mulcahey, MD, UNITED STATES Scott Mullen, MD, UNITED STATES Paul Schroeppel, MD, UNITED STATES Kimberly J. Templeton, MD, UNITED STATES Bryan Vopat, UNITED STATES
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
Can Pre-operative MRI Accurately Predict Hamstring Autograft Diameter in Anterior-cruciate Ligament Reconstruction? Abstract Presentation 6 minutes Michael Tan Arnold, BS, UNITED STATES Ignacio Garcia-Mansilla, MD, ARGENTINA Myra Trivellas, MD, UNITED STATES Thomas J. Kremen, MD, UNITED STATES

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Relationship Between Posterior Tibial Slope And Sagittal Plane Mechanics During Jump Landing After Anterior Cruciate Ligament Reconstruction

Relationship Between Posterior Tibial Slope And Sagittal Plane Mechanics During Jump Landing After Anterior Cruciate Ligament Reconstruction

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Relationship Between Posterior Tibial Slope And Sagittal Plane Mechanics During Jump Landing After Anterior Cruciate Ligament Reconstruction

Relationship Between Posterior Tibial Slope And Sagittal Plane Mechanics During Jump Landing After Anterior Cruciate Ligament Reconstruction

Methods

Results

Conclusion

More ISAKOS 2021: Global Content