Bone reamer for shaping bone sockets or cavities during...

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/16 (2006.01)

Patent

CA 2278563

The invention is directed to a reamer (10) for shaping a bone socket (50), such as an acetabular cavity. The reamer (10) comprises cutting means for removing material from the socket during rotation of the cutting head. The cutting means comprises a number of relatively long main cutting edges, each of which extends in a direction from a base to a top of the reamer, and a number, higher than said number of main cutting edges, or relatively short peripheral cutting edges, which are located at the base and distributed at angularly spaced intervals about a rotational axis. The invention also provides a method for implanting a prosthesis component in a bone socket (50). During the shaping of the bone socket, a top portion of a reamer (10) is completely received in the bone socket (50) to such an extend, that a cylindrical entrance portion (52) is formed in the socket. The invention also provides a kit including a reamer and a prosthesis.

L'invention concerne un alésoir (10) permettant de former une emboîture osseuse (50) telle qu'un acétabule. L'alésoir (10) comprend un moyen de coupe permettant d'enlever du matériau de l'emboîture pendant la rotation de la tête de coupe. Le moyen de coupe comprend, d'une part, un certain nombre de bords de coupe relativement longs, chacun d'eux s'étendant dans une direction allant de la base vers le sommet de l'alésoir et, d'autre part, un certain nombre de bords de coupe périphériques relativement courts, en nombre supérieur à celui des bords de coupe principaux. Les bords de coupe courts sont répartis à la base à des intervalles angulaires autour d'un axe de rotation. L'invention concerne un procédé d'implantation d'une prothèse dans une emboîture osseuse (50). Pendant la réalisation de l'emboîture osseuse, la portion supérieure d'un alésoir (10) est entièrement introduite dans l'emboîture osseuse (50) sur une longueur qui permet de former une partie d'entrée cylindrique (52) dans l'emboîture. L'invention concerne également un kit comprenant un alésoir et une prothèse.

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