Implant for filling a space between vertebrae

Details Implant for filling a space between vertebrae Implant for filling a space between vertebrae

A - Human Necessities

61

F

A61F 2/44 (2006.01) A61F 2/30 (2006.01) A61F 2/00 (2006.01) A61F 2/46 (2006.01)

Patent

CA 2228812

The invention relates to an implant which consists of two end pieces abutting against the adjacent vertebrae and an intermediate middle piece joined to one of the end pieces by a thread, whereby the overall length of the implant can be adjusted by turning the middle piece. The end pieces form tubular sleeves with openings through their walls, and fit axially into each other, slide axially against each other along their sleeve walls, and are secured against rotating relative to each other around the sleeve axis. The thread is arranged between the middle piece and the end piece that is threaded to it. The middle piece which turns in the thread is designed as an axial stop for the other end piece.

Cet implant est constitué de deux pièces terminales (1, 2) qui s'appuient sur les vertèbres adjacentes et d'une pièce centrale intermédiaire (3) reliée à une des pièces terminales par un filetage (4). La longueur totale de l'implant peut être modifiée par mise en rotation de la pièce centrale (3). Les pièces terminales (1, 2) forment des manchons tubulaires (5', 5'') avec des parois traversées par des passages (6). Les manchons (5', 5'') s'emboîtent axialement l'un dans l'autre et les pièces terminales (1, 2) coulissent axialement l'une dans l'autre et sont assujetties de façon à ne pas tourner l'une par rapport à l'autre autour de l'axe du manchon. Le filetage (4) est situé entre la pièce centrale (3) et la pièce terminale (1) à laquelle il est raccordé. La pièce centrale (3), qui peut tourner dans le filetage (4), sert de butée axiale pour l'autre pièce terminale (2).

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