TOTAL KNEE PROSTHESIS

摘要

The present invention relates to a total knee prosthesis. This prosthesis comprises a femoral implant (2) with two condyles (8, 9) delimiting between them an intercondylar notch (10), a tibial implant (3) designed to rest on the end of the tibia, and an articular insert (4) which is interposed between the tibial implant and the femoral implant and whose upper surface (41) comprises two glenoid cavities (18, 19) that have an outer profile (181, 191) matching the outer profile (81, 91) of the condyles (7, 8) of the femoral implant and that are connected to each other by an interglenoid connection surface (20). According to the invention, the intercondylar notch (10) and the interglenoid connection surface (20) have matching contact surfaces (101, 201) which are inscribed within two complementary hyperbolic paraboloids, and the contact surface (181, 191) of the glenoid cavities (18, 19) has an ovoid shape in horizontal section, and its declivity point (P) is situated posteriorly with respect to the line of greatest width (L) of the insert.