Hinged joint system

摘要

Methods, systems, and devices for replacement of a joint with a prosthetic system that replicates the natural kinematics of the joint is disclosed. A prosthetic system according to one embodiment includes a tibial component having a tibial plateau and a tibial stem portion, the tibial plateau having a top side and a bottom side, a tibial insert, with a bearing surface, adapted to be positioned on the top side of the tibial plateau, a femoral component having a base portion and a central housing, the femoral component having an axis of extension-flexion rotation, the base portion having a pair of condyles, an a mechanical linkage component linking the tibial component with the femoral component and with the tibial insert in between the tibial component and the femoral component, so that there is a center of contact between the condyles and the bearing surface.

主权项

1. A prosthetic system for performing the function of a knee joint, comprising:
(a) a tibial component having a tibial plateau that has a top side and a bottom side; (b) a post having a proximal end and a distal end, the post adapted to project from the top side of the tibial plateau; (c) a tibial insert having an aperture, the tibial insert adapted to be positioned on the top side of the tibial plateau with the post received in the aperture; (d) a femoral component having a pair of condyles; and (e) a mechanical linkage that includes an axle adapted to extend between the condyles, the mechanical linkage being adapted to connect the femoral component and tibial component and to maintain the axle at a fixed distance from the post while centers of contact between the condyles and the tibial insert move posteriorly along the tibial insert during flexion.