TKA Polyethylene Wear and Manufacturing

In evaluating methods of polyethylene sterilization for hip arthroplasty, gamma irradiation in air compared to irradiation in an inert substance results in which. The choices are one, no difference in regards to outcome. Two, higher rate of cross-linking when irradiated in air. Three, lower rate of oxidation when irradiate in air. Four, accelerated wear and failure when irradiated on air. And five, better wear resistance and longevity when irradiated with argon or nitrogen.