COA/AOA:Effect of oxinium or cobalt-chrome w/standard or cross-linked polyethylene on wear .
A Randomized Controlled Trial Comparing Wear of Oxinium and Cobalt-Chrome on Standard and Cross-Linked Polyethylene
80 patients (91 hips) who were scheduled to receive total hip arthroplasty were randomly assigned into 1 of 4 groups to compare the clinical and radiological outcomes of four bearing surface combinations. The four combinations were: cobalt-chrome (CoCr) on standard, ultra-high-molecular-weight polyethylene (UHMWPE), CoCr on cross-linked polyethylene (XLPE), Oxinium (Ox) on UHMWPE, and Oxinium on XLPE. At an average of 6.8 years follow-up, XLPE liners demonstrated reduced linear wear rate when compared to UHMWPE liners, irrespective of the femoral head that was used (either oxinium or cobalt-chrome).
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