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Wear and Loosening in Cemented Hip Arthroplasty

The mechanisms of loosening in total hip arthroplasty (THA) and the role of polyethylene (PE) wear debris in this process is unclear. Radiographic measurements showed that THA with 32 mm heads have about 3 times greater volumetric wear than those with 22 mm heads. If PE debris were the main cause of loosening, then there should be an obvious difference in revision rates between the prostheses with