Tibial component
AssigneeBTG International Limited
InventorsJohn Joseph O'Connor, John William Goodfellow, David Murray
Life of this patent
Estimating the term…
Abstract
A tibial knee joint prosthesis for attachment to a suitably prepared tibial bone, providing bearing portions in the lateral and medial compartments. The lateral and medial bearing surfaces of the component are inclined at different angles in the anterior to posterior direction of the knee, so that when mounted to the tibia, the lateral bearing surface of the prosthesis is higher than the medial bearing surface to the posterior side of the knee. In this way the lateral ligament is tightened progressively more than the medial ligament as the knee moves from extension to flexion, resulting in increased stability in the lateral compartment.
Claims14
A prosthesis for implantation in the knee joint, said prosthesis comprising:
- a tibial component having an anterior end and a posterior end, and a first, major upper surface and a second, major lower surface opposite said first surface for attachment to the tibia, said first surface including a lateral bearing plateau region and a medial bearing plateau region, wherein the respective angles of inclination in the antero-posterior direction of said lateral and said medial bearing plateau regions of said first surface, with respect to said second surface, are dissimilar, respective planes fitted to said lateral and medial plateau regions being inclined to each other between said anterior and posterior ends.
Dependencies are inferred from the claim text.