Expansive osteosynthesis sheath

Details Expansive osteosynthesis sheath Expansive osteosynthesis sheath

A - Human Necessities

61

F

A61F 2/44 (2006.01) A61F 2/30 (2006.01) A61B 17/88 (2006.01) A61F 2/00 (2006.01) A61F 2/02 (2006.01) A61F 2/28 (2006.01) A61F 2/46 (2006.01)

Patent

CA 2266126

An expansive osteosynthesis implant comprises branches (5) connected by one of their ends to a tube cap (7) pierced by an orifice (8), which can be slid from the rear between the vertebral disks of two consecutive vertebrae, so as to maintain them at a set distance and restore the stability of the spinal column. Said branches (5) and said tube cap (7) define a hollow sheath which, in inoperative position, has a general cylindrical external shape with circular cross section and at least part of the internal volume (9) of the sheath (1) towards the distal ends of the branches (5), is in the shape of a revolving truncated cone with its larger base on the side of said tube cap (7). This implant comprises at least three branches (5) and at least one wedge (2) capable of passing into said orifice (8) and through the larger base of the truncated cone into said internal volume (9).

Un implant d'ostéosynthèse expansif comprend des branches (5) reliées à l'une de leurs extrémités à un culot (7) percé d'un orifice (8), pouvant être glissé par voie postérieure entre les plateaux vertébraux de deux vertèbres consécutives, afin de les maintenir à une distance donnée et rétablir la stabilité de la colonne vertébrale. Selon l'invention, lesdites branches (5) et ledit culot (7) délimitent une cage (1) creuse dont, en position "repos", la forme générale extérieure est un cylindre de section circulaire et une partie au moins du volume intérieur (9) de la cage (1) vers les extrémités distales des branches (5), est en forme de tronc de cône de révolution dont la plus grande base est du côté dudit culot (7), lequel implant comprend au moins trois branches (5) et: au moins une cale (2) apte à passer dans ledit orifice (8) et par la grande base du tronc de cône dans ledit volume intérieur (9).

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