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The Journal of Arthroplasty, ISSN: 0883-5403, Vol: 25, Issue: 6, Page: 839-843
Hip
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Wear and Range of Motion of Different Femoral Head Sizes
Hammerberg, Eric Mark; Wan, Zhinian; Dastane, Manish; Dorr, Lawrence DHip
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 mm3/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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