Abstract
After the total knee arthroplasty, it is important to evaluate between the patella component and the femoral component, because patella components affect the complications and the flexion angle. The purpose of this study was to investigate the mechanisms of contact between the patellofemoral joint. Femur and tibia were created by aluminum alloy. The implanted knee model was constructed to replace the cruciate-retaining artificial knee joint to them. Artificial ligaments were used as quadriceps model and patellar tendon model. The contact pressure were measured at seven flexion angle (90 degree, 100 degree, 110 degree, 120 degree, 130degree, 140degree and 150 degree) under the applied loads of 1000N. In result, the contact pressure was considered to increase with rising flexion angle, but such a phenomenon was not showed. It is possible that not increased contact pressure is effect of contact between femur and quadriceps. Understanding the advantage and disadvantage of the patella component function may help to develop sophisticated component design.
