Endoprosthetic knee joint

Abstract

An endoprosthetic knee joint has a femur portion, a tibia portion, and a coupling portion. The femur portion has a femur shaft having convexly curved condyle shells at a lower end, the shells having primary slide surfaces and two spaced apart side walls forming an intercondylar space. The tibia portion has a tibia shaft with a tibia plateau at an upper end, upon which are formed secondary slide surfaces. The tibia plateau has an axial recess with a cross-section which expands toward the plateau from the depth of the recess on one side to a slot in the plateau. The coupling portion has a coupling pin rotatably housed in the recess, and a joint head at the upper end of the pin projects into the intercondylar space. During coupling of the parts of the prosthesis, the knee need not be stretched by the length of the coupling pin, but rather the pin can be introduced into the tibia portion by simple pivoting.

Dependencies are inferred from the claim text.