Total Knee Replacement Musculoskeletal Model Using a Novel Simulation Method for Non-conforming Joints

We computed the medial and lateral knee compressive forces for a total knee replacement patient during gait based on the grand challenge data set. The model was based on a scaled version of the Twente Lower Extremity Model (TLEM) with the knee altered to include the prosthesis geometry (the femoral part, the tibial insert and the patella button) as well as ligaments. Contact conditions between the prosthesis parts were established using contact forces. The motion in the internal degrees-of-freedom (DOF) of the knee, the muscle and reaction forces were computed during stance of gait using a novel method called force-dependent kinematics (FDK) implemented in version 5.0 of the AnyBody Modeling System (AnyBody Technology A/S, Denmark).