Knee joint prosthesis has a tibia plate fixed at the upper end of the tibia, and a femur section anchored at the lower end of the femur with three zones of different curvatures and studs of a different thickness

摘要

The knee joint prosthesis has a section (1) to be anchored at the lower end of the femur and a plate (2) to be fixed at the upper end of the tibia, to work together. The femur section has a posterior zone (5), a center zone (4) and a distal zone (3), each with radii of different curvatures, with an increasing curvature from the posterior to the distal zones. The knee joint prosthesis has a section (1) to be anchored at the lower end of the femur and a plate (2) to be fixed at the upper end of the tibia, to work together. The femur section has a posterior zone (5), a center zone (4) and a distal zone (3), each with radii of different curvatures, with an increasing curvature from the posterior to the distal zones. The inner side of the femur section has three surfaces (6-8) matching the zone curvatures, with parallel studs (9,10) aligned at an angle of 25[deg] to the median of the distal zone and against the posterior zone. The stud (9) at the distal zone is thinner than the stud (10) at the intermediate zone.