抄録
Knee movement involves a complicated combination of translations and rotations. Therefore, adequate motion analysis of implanted knee is necessary for estimating the wear of inserts and improving the design of artificial knee joint. This study was aimed to determine the kinematics of total knee arthroplasty (TKA) component during a kneeling activity, stair climbing and walking motion in vivo using image matching technique with a high-resolutional flat panel detector (FPD). The fifteen patients with cruciate-retaining (CR) TKA were examined using this motion analysis. Our analysis could reproduce the in vivo relation of contact between a femoral component and polyethylene insert on a computer. Additionally, motion analysis of artificial knee implants could clarify typical motion patterns depending on patient. Kinetic analysis using our method would be useful to improve the design of artificial knee joint and clinical evaluation.
