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  • Title: Wear and range of motion of different femoral head sizes.
    Author: Hammerberg EM, Wan Z, Dastane M, Dorr LD.
    Journal: J Arthroplasty; 2010 Sep; 25(6):839-43. PubMed ID: 19775859.
    Abstract:
    Femoral head sizes greater than 32 mm are more prevalent with current total hip arthroplasty. We hypothesized that linear wear rates of Durasul highly cross-linked polyethylene would not differ with different head sizes. We also compared the range of motion of the hip. Ninety-four consecutive arthroplasties in 84 patients were studied for a mean 3.6 +/- 0.7 years. There was no statistical difference in linear wear rates and annual or total penetration rates when 28-mm and 32-mm heads were compared to 38-mm and 44-mm heads. Volumetric wear was 12.4 mm(3)/y higher with bigger heads. Range of motion did not differ. Larger femoral head sizes show no evidence of an accelerated wear pattern when used with Durasul.
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