Device for optimizing a knee endoprosthesis

Details Device for optimizing a knee endoprosthesis Device for optimizing a knee endoprosthesis

A - Human Necessities

61

F

A61F 2/46 (2006.01) A61F 2/38 (2006.01)

Patent

CA 2420118

The invention relates to a device for determining the optimal dimensions of the components of a knee endoprosthesis. Said device is essentially comprised of: an angular element (7), which has a first anterior plate (9) and a second distal plate (10) that is arranged at right-angle thereto; B) a first caliper (16), which is arranged on the second plate (10) in a manner that permits it to be displaced parallel to the central axis (19) and to be arrested, and which has a bearing surface (25), said bearing surface being essentially parallel to the first plate (9) and provided for resting against a tibial plateau (29) when a knee joint is bent, and C) a second caliper (11), which is arranged in a manner that permits it to be displaced parallel to the longitudinal axis (8) of the first plate (9) and to be arrested, and which has a bearing surface (24), said bearing surface being essentially parallel to the inner side (23) of the second plate (10) and provided for resting against the tibial plateau (29) when the knee joint is straightened.

L'invention concerne un dispositif permettant de déterminer les dimensions optimales des éléments constitutifs d'une endoprothèse du genou. Ce dispositif comprend principalement: A) un élément angulaire (7) qui présente une première plaque antérieure (9) et une seconde plaque distale (10) disposée à angle droit par rapport à la précédente; B) un premier étrier (16) monté sur la seconde plaque (10), de manière à être déplacé et arrêté parallèlement à l'axe central (19), qui comporte une surface d'appui (25) sensiblement parallèle à la première plaque (9), destinée à reposer sur un plateau de tibia (29), lorsque l'articulation du genou est pliée; et C) un second étrier (11) monté de manière à être déplacé et arrêté parallèlement à l'axe longitudinal (8) de la première plaque (9), qui présente une surface d'appui (24) sensiblement parallèle à la face intérieure (23) de la seconde plaque (10) et destinée à reposer sur le plateau de tibia (29) lorsque l'articulation du genou est en extension.

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