William J. Maloney,John M. Green,Michael L. Brooks
申请号：
US13009117
公开号：
US20120185054A1
申请日:
2011.01.19
申请国别(地区):
US
年份:
2012
代理人:
摘要：
A knee prosthesis includes a femoral component for mounting to the distal end of the patients femur and a tibial insert component. The femoral component includes a posterior cam extending between the lateral condylar structure and the medial condylar structure. The tibial insert includes a lateral bearing surface, a medial bearing surface, and a raised post portion having a posterior surface adapted to cooperate with the posterior cam of the femoral component. The posterior surface includes a posteriorlateral camming surface and a posteriormedial camming surface and each of the two camming surfaces have different radii of curvature. Between 60° to 90° of knee flexion, the posterior cam of the femoral component engages the raised post portion of the tibial insert and cooperates with the posteriorlateral and the posterior medial camming surfaces to promote posterior translation of the lateral condylar surface on the lateral bearing surface.
