Implants for the treatment of osteoarthritis of the knee

摘要

A replacement knee implant has a femoral implant and a tibial implant, each of which are inset in a bone surface. The tibial implant is generally elongated with one end rounded and an opposite end conforming to the shape of the tibia, and is made of a metal alloy or a ceramic. The upper surface is dished while the lower surface is planar and can be parallel or sloped relative to the upper surface. The femoral implant for implementation in a femoral condyle is rounded such that, when implemented, the femoral implant is flush at the anterior and posterior sides and protruding away from the femur between the anterior and posterior ends. The femoral implant can have an elongated keel for extending into the femur, and can be made from a highly cross-linked polyethylene.

主权项

1. A method of providing a femoral implant to a knee with osteoarthritis, comprising the steps of:
a. resecting a portion of a femur of a patient, the resected portion comprising an arthritic lesion on a distal medial femoral condyle of the femur; b. providing a femoral implant to the resected femur, the implant being at least 8 mm in thickness and having a bearing surface that is convex,the implant being set into the resected femoral condyle such that the implant is flush with the articular surface of the cartilage located at anterior and posterior locations of the knee, the implant projecting above the articular surface of the cartilage in the center of the implant, the projection tapering flush with the articular surface of the cartilage at the medial and lateral edges of the implant.