In the past three decades the majority of the implanted orthopedic prostheses included a bearing component made of ultrahigh molecular weight polyethylene (UHMWPE) articulating against a femoral metallic or ceramic ball or a metallic tibial plateau. Wear of the polyethylene bearing surfaces produces abrasion particles [1], often causing a foreign body response that may lead to bone resorption (osteolysis) and loosening of the components, and thereby limiting the life expectancy of hip prostheses. Thus, improving the wear resistance of the polyethylene can substantially extend the clinical life span of total hip prostheses.