Wear resistant surface-gradient crosslinked polyethylene

Details Wear resistant surface-gradient crosslinked polyethylene Wear resistant surface-gradient crosslinked polyethylene

1998-04-14

2000-12-26

Hirsch, Paul J.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

623 22, A61F 230, A61F 232

Patent

active

061652202

ABSTRACT:
A method for improving the wear resistance of an implant by crosslinking its bearing surface layer, while leaving its non-bearing interior uncrosslinked. Such crosslinking may be achieved by electron-beam irradiation or by chemical crosslinking of the implant. The resulting implant may be further treated to remove the residual free radicals (generated by the electron beam crosslinking process), to remove its most oxidized layer, and/or to stabilize its size. In the case of chemical crosslinking, the resulting implant may be further treated to remove residual chemicals from the crosslinked surface layer.

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