| 摘要 |
PROBLEM TO BE SOLVED: To provide a knee prosthesis for accurately reproducing smooth knee movements emulating movements of a natural knee joint, and a method for making the knee prosthesis reproduce such movements. SOLUTION: The knee prosthesis replaced with the animate knee joint enables engagement and relative movement along arcuate tracks, between the femoral component and the tibial component of the knee prosthesis, concreetly rotational movement about a longitudinal axis of rotation, during flexion about a transverse axis of rotation. The transverse axis of rotation is maintained essentially in a generally inner-outer longitudinal plane during flexion within a prescribed range of flexion (extending from about 0°, preferably to about 60°of flexion). The longitudinal directional plane is arranged adjacent to generally coronal plane passing the curvature center of the arcuate track. The knee prosthesis includes a stabilizing mechanism for coupling the femoral component with the tibial component within a portion of the prescribed range of flexion, for providing stability of the rotational movement and for assisting in maintaining the transverse axis of rotation essentially in the longitudinal plane in close proximity with the coronal plane as the longitudinal plane is rotated about the longitudinal axis of rotation. COPYRIGHT: (C)2004,JPO&NCIPI
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