RESPONSE ANALYSIS OF THE KNEE JOINT IN FLEXION UNDER QUADRCEPS ACTIVATION

  • W. Mesfar
  • A. Shirazi-Adl
Keywords: knee joint, biomechanics, quadriceps force, finite elements, ligaments

Abstract

The human knee joint is a complex structure with interactions between muscle forces, ligaments, menisci and articulations at different regions. Proper management of rehabilitation and treatment programs requires a solid understanding of such interactions in intact and injured conditions. Towards this goal, a realistic nonlinear 3-D finite element model of the entire knee joint is developed. In this work, the ligament forces and contact stresses/areas are computed as the unconstrained joint is flexed from 0° to 90° ± a constant 137 N quadriceps force. Predictions support the coupling between various components as a function of quadriceps exertion and flexion angle. The model is promising in augmenting our understanding of the joint function leading to improved design for rehabilitation programs and replacement procedures in active patients.
Published
2008-03-25