Tibial bearing insert reinforcement pin

A - Human Necessities – 61 – F

Patent

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

Patent

CA 2193780

A knee prosthesis includes a femoral component, a patella insert, a tibial bearing insert, a tibial tray and a reinforcement pin. The reinforcement pin is constructed such that it includes a ribbed region comprised of one or more circumferentially oriented ribs. The diameter of the ribbed region of the pin exceeds that of the non-ribbed region of the pin. The reinforcement pin is adapted to seat within a bore formed in the tibial bearing insert in an interference fit. A distal portion of the pin protrudes from the inferior surface of the tibial bearing insert and is adapted to fit, in a clearance fit, within a bore formed in a superior surface of the tibial tray.

rothèse du genou comprenant une composante fémorale, un insert rotulien, un insert d'appui tibial, un plateau tibial et une tige de renfort. La tige de renfort comporte une région nervurée comprenant une ou plusieurs nervures orientées de manière circonférencielle. Le diamètre de la région nervurée de la tige dépasse celui de la région non nervurée de la tige. La tige de renfort est adaptée pour s'assujettir dans une ouverture pratiquée dans l'insert d'appui tibial, dans un ajustement de type serré. Une partie distale de la tige fait saillie de la surface inférieure de l'insert d'appui tibial et est adaptée pour s'ajuster, dans ajustement avec jeu, dans une ouverture pratiquée dans la surface supérieure du plateau tibial.

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