Knee joint endoprosthesis set and instruments

Abstract

A knee joint endoprosthesis set comprising modular knee joint endoprostheses in different sizes. Each knee joint endoprosthesis comprises a tibial component (2). The femoral component (3) comprises a joint element for articulated cooperation with the tibial component and comprises a shaft (5) for anchoring in the femur. The set comprises shafts in different sizes. In the femoral component (3), the shape of the shafts tapers from a distal end (51), facing toward the joint element, to a proximal free end (52) of the shaft. An oval cross section is provided at the distal end (51), and a round cross section is provided at the proximal free end (52) of the shaft. An ovality defined by the oval cross section increases as the size of the shafts increases. The different sizes are preferably graded according to the ovality. The set permits excellent adaptation to the particular medullary canal by means of the different sizes. By virtue of the size-dependent variation in the ovality, a secure anchoring comparable to that provided by custom-made models can be achieved with a small number of predefined sizes.

Dependencies are inferred from the claim text.