Oxidation-resistant and wear-resistant polyethylenes for human joint replacements and methods for making them

[Subject] The method for raising the wear resistance of polyethylene is offered. [Solution means]. Irradiate the above-mentioned oxidation-resistant implant by radiant quantities lower than about 100 Mrad (s) higher than standard sterilization radiant quantities in order to prepare an oxidation-resistant implant, to carry out bridge construction combination of the; implant and to improve wear resistance. It is the implant for medical treatments produced to oxidization from the oxidation resistance and the production methods of wear-resistant polyethylene that tolerance is large, and this polyethylene, from the implant into which the oxidation-resistant implant was machined from standard preform ultrahigh molecular weight polyethylene including the step. [Selection figure] Fig. 1