Linked condylar total knee replacement

Details Linked condylar total knee replacement Linked condylar total knee replacement

A - Human Necessities

61

F

A61F 2/38 (2006.01)

Patent

CA 2382778

A knee prosthesis is disclosed comprising a femoral component (1) having condylar bearing surfaces (2, 3) and a tibial component (10) having bearing surfaces (16) for receiving the condylar bearing surfaces (2, 3), the femoral (1) and tibial (10) components being linked together by a post (12) which is secured at a first end to the tibial component (10) and at the opposite end is received in an intercondylar housing (5) of the femoral component (1), said opposite end of the post (12) having surfaces which permit relative rotational movement of the post (12) within the housing (15), but prevents the femoral component (1) separating from the tibial component (10). The advantage of the prosthesis is that it combines the bone-preserving characteristics of the constrained condylar type of prosthesis with the stability characteristics of a rotating hinge.

L'invention concerne une prothèse du genou comprenant un implant fémoral (1) ayant des surfaces d'appui condyliennes (2, 3) et un implant tibial (10) dont les surfaces d'appui (16) reçoivent les surfaces d'appui condyliennes (2, 3). Les implants fémoral (1) et tibial (10) sont reliés par un tenon (12) fixé à une première extrémité à l'implant tibial (10) et logé à l'extrémité opposée dans une enveloppe intercondylienne (5) de l'implant fémoral (1). L'extrémité opposée du tenon (12) présente des surfaces qui permettent un mouvement tournant relatif du tenon (12) à l'intérieur de l'enveloppe (15), mais empêche l'implant fémoral (1) de se séparer de l'implant tibial (10). Cette prothèse présente l'avantage de combiner les caractéristiques de la prothèse condylienne contrainte en matière de préservation osseuse avec les caractéristiques de stabilité d'une charnière tournante.

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