Method and apparatus for knee prosthesis

Details Method and apparatus for knee prosthesis Method and apparatus for knee prosthesis

A - Human Necessities

61

F

A61F 2/38 (2006.01) A61F 2/30 (2006.01) A61F 2/00 (2006.01)

Patent

CA 2312395

The invention is a knee prosthesis which more accurately reproduces the rollback of natural knee movement and, thus, reduces wear on the tibial component. The knee prosthesis includes a femoral component (10) with two cams (22, 24), the first (22) located between the posterior condylar sections (14), and the second (24) located towards the anterior end of the condylar sections (14) with a slot surface therebetween. The tibial component (30) includes a spine which engages each cam as it rotates along the femoral component and the slot surface (20) during flexion, and extension.

Cette invention a trait à une prothèse du genou reproduisant avec beaucoup d'exactitude le basculement naturel du genou et, de ce fait, diminuant l'usure du composant tibial. Le composant fémoral (10) de cette prothèse est pourvu de deux cames (22, 24), la première (22) se trouvant entre les régions condyliennes postérieures (14) et la seconde (24) se positionnant vers l'extrémité antérieure des régions condyliennes (14) avec une surface à évidement entre elles. Le composant tibial (30) comporte une arête entrant en prise avec chaque came lors de la rotation le long du composant fémoral et de la surface à évidement (20) durant la flexion et l'extension.

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