Tibial prosthesis

A - Human Necessities – 61 – F

Patent

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Details

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

Patent

CA 2210907

A tibial prosthesis (10) includes a tibial tray (11) and a stem (25). The stem (25) has a cylindrical section (39) and a tapering section (40). Fins (41) extend longitudinally from the proximal end to the distal end of the stem (25), tracking both the cylindrical and tapering portions (39, 40) thereof so that each of the fins (41) tracks a uniform diameter section of the stem (25) for a majority of its length. The tapering section (40) of the stem (25) is equal to about one third of its overall length, and defines the distal end of the stem. The fins (41) are longitudinally placed about the stem exterior surface, and are generally parallel. Between the fins are U-shaped channels (42) that are similarly longitudinally extending and generally parallel. The stem (25) provides a central longitudinal axis. The fins (41) and channels (42) are parallel to the central longitudinal axis of the stem (25).

L'invention porte sur une prothèse tibiale (10) comportant un plateau tibial (11) et une tige (25) comportant une partie cylindrique (39) et une partie conique (40). Des nervures (41) s'étendent longitudinalement de l'extrémité proximale à l'extrémité distale de la tige (25) à la fois sur la partie cylindrique et la partie conique (39, 40), chacune des nervures (41) s'étendant sur la quasi totalité de sa longueur sur une partie de diamètre constant de la tige (25). La partie conique (40) de la tige (25) qui représente environ un tiers de sa longueur totale en constitue l'extrémité distale. Les nervures (41) sont disposées longitudinalement à la surface de la tige et sensiblement parallèles. Entre les nervures se trouvent des canaux en U (42) également disposés longitudinalement à la surface de la tige et sensiblement parallèles. La tige (25) comporte un axe longitudinal central auquel les nervures (41) et les canaux (42) sont parallèles.

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