A Computational Simulation of the Effect of Graft Stiffness on Anterior Cruciatereconstruction
نویسندگان
چکیده
Introduction Bone-patella tendon-bone (BPTB) grafts are widely used for anterior cruciate ligament (ACL) reconstruction. Experimental data have demonstrated that these grafts are almost 3 times stiffer than the ACL. (1,2) While many in-vivo and in-vitro data demonstrated that the ACL reconstruction is efficient in restoring anterior stability using anterior drawer tests, recent in-vivo measurement on ACL reconstructed patients showed that the tibial rotation was over corrected after ACL reconstruction indicating an over-constrained knee. Many factors, such as graft fixation and orientation, initial graft tension, and stiffness of the graft material influence the post-operative stability of the knee. However, few data are available describing the effect of these variables on knee joint function under physiological loading conditions. This study investigated the effect of graft stiffness and initial graft tension on knee joint kinematics under simulated anterior and muscle loading using a validated, 3D finite element knee joint model.
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