Posterior stabilized prosthetic knee replacement with bearing translation and dislocation prevention features

摘要

A prosthetic replacement knee joint includes a tibial component (500), a femoral component (200), a bearing (300) and a control arm assembly (400). The bearing (300) has an inferior surface slidably engaged with the superior surface of the tibial component and formed with a groove therein. A notch (301) extends into the posterior extreme of the bearing (300). The femoral component (200) has a pair of convex arcuate condyles in articular bearing engagement with the superior surface of the bearing. The femoral component also includes a posterior notch (201). The control arm (410) of the control arm assembly (400) has a bearing rotatable positioned in the recess of the tibial component. The control arm further has a guide slidably engaged in the groove of the bearing. A post (420) projects through the notch in the bearing and into the notch of the femoral component. The post has medial and lateral projections (422) that engage portions of the notch in the femoral component.