Intervertebral disc replacement and associated instrumentation

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/44 (2006.01) A61B 17/17 (2006.01)

Patent

CA 2627345

An endplate for an intervertebral prosthesis includes an inner domed region (330) and a peripheral rim (332) wherein the inner domed region has a non- circular plan and has an area that is at least 50 % of the area of the endplate. A surgical instrument for milling a recess in a vertebral endplate includes a cutting tool having a drive shaft with a positioning collar, a guard frame, and a pair of guide plates attached to the guard frame and space to confine the positioning collar and having guide slots for the drive shaft.

L'invention porte sur une plaque d'extrémité de prothèse intervertébrale comprenant une zone intérieur en dôme et une bordure périphérique, la zone intérieur en dôme, de plan non circulaire s'étendant sur une surface de moins de 50% de celle de la plaque d'extrémité. L'invention porte également sur instrument chirurgical servant à meuler un évidement dans une plaque d'extrémité vertébrale comportant un arbre de commande muni d'un collier de positionnement, d'une garde, et d'une paire de plaques de guidage fixées à la garde et espacées pour limiter les déplacements du collier de positionnement et présentant des fentes de guidage de l'arbre de commande.

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