Selectively cross-linked polyethylene orthopedic devices

Details Selectively cross-linked polyethylene orthopedic devices Selectively cross-linked polyethylene orthopedic devices

A - Human Necessities

61

L

A61L 27/16 (2006.01) B29C 35/02 (2006.01) B29C 35/08 (2006.01) A61F 2/00 (2006.01) A61F 2/30 (2006.01)

Patent

CA 2370208

An improved prosthetic medical device having improved wear resistance and toughness is provided in the present application. A method is provided to selectively cross-link the polymeric matrix comprising the medical device by employing an interrupting means such as a mask, wire mesh or chopper wheel placed in between the medical device and irradiation source. In addition, the medical device may be translated while being irradiated to further effect the selective cross-linking. The present invention also provides for an injection molding process wherein a prosthetic medical device is formed in a single step, then selectively cross-linked.

La présente invention concerne un dispositif médical prothétique qui présente une résistance à l'usure et une robustesse améliorée. Un procédé permet de réticuler de façon sélective la matrice polymère qui comprend le dispositif médical en utilisant un moyen de coupure tel qu'un masque, un grillage ou un tambour de roue broyeur placé entre le dispositif médical et la source de rayonnement. On peut en outre transférer ce dispositif médical en cours d'irradiation afin de continuer la réticulation sélective. Cette invention concerne aussi un processus de moulage par injection par lequel un dispositif médical prothétique est formé en une seule étape, laquelle est suivie de la réticulation sélective.

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