Dowel for fusing bones

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/44 (2006.01) A61F 2/28 (2006.01) A61F 2/00 (2006.01) A61F 2/02 (2006.01) A61F 2/30 (2006.01)

Patent

CA 2377836

Existing bone dowels are improved through the use of rigid, preferably metallic end plates (306, 320). The plates are positioned relative to the anterior and posterior end surfaces of the bone dowel. The completed structure may be inserted, removed, and positioned into the vertebrae. The use of the rigid endplates (306, 320) facilitates load sharing which helps to prevent graft fracture. In the preferred embodiment, the end plates (306, 320) are positioned against the end surfaces of the bone section (400) through the use of a link member (308), which passes through the interior of the bone section (400) and connects the end plates (306, 320). One of the end plates (320) may include a threaded bore, and one end of the link member may be threaded to receive the threaded bore of that end plate to hold it in place.

On peut améliorer les chevilles osseuses existantes en utilisant des plaques (306, 320) d'extrémités rigides, de préférence métalliques. Ces plaques viennent se placer sur les faces, antérieure et postérieure, de la cheville osseuse. Il est possible d'insérer, d'enlever et de positionner la structure dûment achevée dans les vertèbres. L'utilisation de plaques (306, 320) d'extrémité rigides facilite la répartition des charges, ce qui contribue à éviter une rupture du transplant. Dans le mode de réalisation préféré, les plaques (306, 320) d'extrémité sont positionnées contre les faces extrêmes du segment osseux (400) à l'aide d'un élément de liaison (308) traversant ce segment (400) et connectant ces plaques (306, 320) d'extrémité. L'une des plaques (320) d'extrémité peut comporter un alésage fileté et une extrémité de l'élément de liaison peut être fileté pour recevoir cet alésage fileté et maintenir la plaque en place.

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