Surface alloyed medical implant

Details Surface alloyed medical implant Surface alloyed medical implant

A - Human Necessities

61

L

A61L 27/04 (2006.01) A61L 27/06 (2006.01)

Patent

CA 2711156

A medical implant is disclosed. The medical implant includes: a first biocompati-ble metal forming a substrate (210, 310, 410), a second biocompatible metal diffused into the first biocompatible metal to form an biocompatible al-loy surface (220, 314, 414), the alloy surface fur-ther including a diffusion hardening species, wherein the diffusion hardening species may be carbon, nitrogen, oxygen, boron, or any combina-tion thereof. A method of forming a medical im-plant is also disclosed. The method includes the steps of. providing a first biocompatible metal or alloy that forms a substrate (210, 310, 410), pro-viding a second biocompatible metal or alloy, dif-fusing the second biocompatible metal into the first biocompatible metal to form an alloy layer (220, 314, 414), removing excess second metal material from the substrate to expose the alloy layer, and diffusion hardening the alloy layer.

L'invention porte sur un implant médical. L'implant médical comprend : un premier métal biocompatible formant un substrat (210, 310, 410), un second métal biocompatible diffusé dans le premier métal biocompatible pour former une surface d'alliage biocompatible (220, 314, 414), la surface d'alliage comprenant en outre un élément de durcissement par diffusion, l'élément de durcissement par diffusion pouvant être du carbone, de l'azote, de l'oxygène, du bore ou toute combinaison de ceux-ci. L'invention porte également sur un procédé de fabrication d'un implant médical. Le procédé consiste : à utiliser un premier métal ou alliage biocompatible qui forme un substrat (210, 310, 410), à utiliser un second métal ou alliage biocompatible, à diffuser le second métal biocompatible dans le premier métal biocompatible pour former une couche d'alliage (220, 314, 414), à retirer le second matériau métallique en excès du substrat pour exposer la couche d'alliage, et à faire durcir par diffusion la couche d'alliage.

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