Medial collateral ligament insertion site and contact forces in the ACL-deficient knee

Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society
Benjamin J EllisJeffrey A Weiss

Abstract

The objectives of this research were to determine the effects of anterior cruciate ligament (ACL) deficiency on medial collateral ligament (MCL) insertion site and contact forces during anterior tibial loading and valgus loading using a combined experimental-finite element (FE) approach. Our hypothesis was that ACL deficiency would increase MCL insertion site forces at the attachments to the tibia and femur and increase contact forces between the MCL and these bones. Six male knees were subjected to varus-valgus and anterior-posterior loading at flexion angles of 0 degrees and 30 degrees. Three-dimensional joint kinematics and MCL strains were recorded during kinematic testing. Following testing, the MCL of each knee was removed to establish a stress-free reference configuration. An FE model of the femur-MCL-tibia complex was constructed for each knee to simulate valgus rotation and anterior translation at 0 degrees and 30 degrees, using subject-specific bone and ligament geometry and joint kinematics. A transversely isotropic hyperelastic material model with average material coefficients taken from a previous study was used to represent the MCL. Subject-specific MCL in situ strain distributions were used in each model. Inserti...Continue Reading

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Citations

Aug 11, 2011·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Natasha AnokaDavid N M Caborn
Mar 31, 2007·Annals of Biomedical Engineering·Nikhil S PhatakJeffrey A Weiss
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