Trochanter retention plate

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/80 (2006.01) A61B 17/74 (2006.01) A61B 17/82 (2006.01) A61B 17/84 (2006.01)

Patent

CA 2661444

The invention relates to an implant for refixation of the greater trochanter (9) on which an osteotomy has been performed or which is fractured. The implant comprises a plate (1) that can be fixed on the proximal femur, and a device (20) that can hold the greater trochanter (9) with a form fit or force fit on the femur (2). This holding device (20) preferably has bendable prongs (16, 17) located at a distance from each other, the first end portion of these prongs (16, 17) being attached to the upper edge (37) of the base plate (1). The holding device (20) also has flexible, elongate members (21, 22), each of which is attached at one end to the free end portion (19) of the respective prong (16, 17). The other, free end portions (142) of the longitudinal members (21, 22) are secured laterally on the base plate (1) after these longitudinal members (21, 22) have crossed the medial aspect of the greater trochanter. This results in a tensioning band construction with at least two restraints based on a plate fixed securely on the proximal lateral femur.

L'invention concerne un implant de refixation du grand trochanter (9) fracturé ou ostéotomisé. L'implant comprend une plaque (1) qui peut être fixée sur la partie proximale du fémur ainsi qu'un dispositif (20) qui permet de maintenir le grand trochanter (9) en correspondance géométrique et en correspondance mécanique sur le fémur (2). Ce dispositif de maintien (20) présente des dents (16, 17) de préférence flexibles qui sont situées à distance les unes des autres. La première partie d'extrémité de ces dents (16, 17) est raccordée au bord supérieur (37) de la plaque de base (1). Le dispositif de maintien (20) présente en outre des éléments flexibles allongés (21, 22) dont l'un est raccordé par une extrémité à la partie d'extrémité libre (19) de la dent (16, 17) respective. Les autres parties d'extrémité libres (142) des éléments allongés (21, 22) sont fixées latéralement sur la plaque de base (1) après que ces éléments allongés (21, 22) ont croisé de façon médiale le grand trochanter. On obtient ainsi une structure à sangles de traction qui présente au moins deux sangles de traction sur la base d'une plaque immobilisée sur un côté de la partie proximale du fémur.

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