ARTIFICIAL KNEE JOINT

摘要

An artificial knee joint (1) is described and comprises a femoral component (10) and a tibial component (30), for attachment to the femur (2) and tibia (3) of a patient (4) respectively. The femoral component (10) comprises a lateral condyle (11) and a medial condyle (12) which extend from the posterior (13) to the anterior (14) of the femoral component (10). A femoral gap (15) is provided between the lateral (11) and medial (12) condyles extending from the posterior (13) toward the anterior (14) of the femoral component (10). The lateral (11) and medial (12) condyles are joined at the anterior (13) of the femoral component (10) to form a patella tracking path or bearing surface (16) which is located at and forms the anterior end of the gap (17). A femoral cam (18) is provided bridging the posterior ends of both the lateral (11) and medial (12) condyles, and forms a posterior end of the gap (19), wherein the femoral cam (18) is structured to have the shape of a section of a ring (20). The tibial component (30) is provided with two approximately symmetric articulation bearing surfaces (31, 32) either side of a central post (33), wherein the articulation bearing surfaces (31, 32) are for receiving the lateral (11) and medial (12) condyles of the femoral component (10), and the post (33) is shaped such that it will fit within the femoral gap (15).

主权项

1. An artificial knee joint comprising a femoral component and a tibial component, for attachment to the femur and tibia of a patient respectively; wherein
the femoral component having a lateral condyle and a medial condyle extending from the posterior to the anterior of the femoral component and wherein a femoral gap is provided between the lateral and medial condyles extending from the posterior toward the anterior of the femoral component, wherein further the lateral and medial condyles are joined at the anterior of the femoral component to form a patella tracking path or bearing surface which is located at and forms the anterior end of the gap; a femoral cam bridging the posterior ends of both the lateral and medial condyles and forming a posterior end of the femoral gap, wherein the femoral cam is structured to have the shape of a section of a ring; wherein further the tibial component is provided with two approximately symmetric articulation bearing surfaces either side of a central post, wherein the articulation bearing surfaces are for receiving the lateral and medial condyles of the femoral component, and the post is shaped such that it will fit within the femoral gap.