Surface hardened biocompatible metallic medical implants

Details Surface hardened biocompatible metallic medical implants Surface hardened biocompatible metallic medical implants

A - Human Necessities

61

L

A61L 27/00 (2006.01) A61F 2/30 (2006.01) A61L 27/04 (2006.01) A61L 27/06 (2006.01) A61L 27/30 (2006.01) A61F 2/00 (2006.01)

Patent

CA 2088795

ABSTRACT This invention provides surface hardened, abrasion resistant high strength, biocompatible metal medical implants, in particular, titanium alloy implants which do not include any elements which have been shown or suggested as having short term or long term potential adverse effect from a standpoint of biocompatibility. Further, the invention provides methods of strengthening and hardening the surfaces of other titanium, zirconium, and cobalt-based alloy implants with small concentrations of a metal solute such as zirconium, yttrium, tantalum, aluminum, silicon, chromium, or thorium via internal oxidation or nitridation. Alternatively, nitrogen, oxygen, or carbon can be diffused directly into the surface of the implants by interstitial hardening to further increase the surface abrasion resistance of these internally oxidized or internally nitridized implant metal or metal alloys.

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