| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that paradoxical anterior translation can occur at nearly any degree of flexion, particularly at mid to late degrees of flexion, in a typical orthopaedic knee prosthesis. <P>SOLUTION: The orthopaedic knee prosthesis includes a tibial bearing and a femoral component configured to articulate with the tibial bearing. The femoral component includes a posterior cam configured to come into contact with the spine of the tibial bearing and a condyle surface curved in a sagittal plane. The radius of curvature of the condyle surface decreases gradually between early-flexion and mid-flexion. Additionally, in some embodiments, the radius of curvature of the condyle surface can be increased during mid-flexion. <P>COPYRIGHT: (C)2010,JPO&INPIT |
