A 3-D finite element (FE) model of the knee is needed to more accurately analyze the kinematics of a knee joint as well as the function of various soft tissues such as ligaments. The data obtained can provide a better understanding of mechanisms of injury and offer valuable information for ligament reconstruction and rehabilitation protocols. The objective of this study was to develop a 3-D non-linear FE model of a human knee and determine its kinematics and the force and stress distributions within the anterior cruciate ligament (ACL) in response to anterior tibial loads at full extension. This model was validated by comparing the computed results to data obtained experimentally by a Robotic/UFS testing system [1].

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