Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4060761 | The Journal of Arthroplasty | 2012 | 6 Pages |
Abstract
A prospective cohort of 30 patients undergoing primary total hip arthroplasty for treatment of osteoarthritis was enrolled in a study to characterize the migration behavior of a clinically successful cementless stem. At 6 years, the mean subsidence of the stem was 0.63 mm (range, â0.33 to 3.68 mm); the mean rotation into retroversion was 1.41° (range, â1.33° to 7.48°). No stems had additional subsidence of more than 0.25 mm between 6 months and 6 years. The resultant mean subsidence between 2 and 6 years was 0.03 mm, which is below the limit measurable by radiostereometric analysis. The data demonstrate that subsidence of this cementless stem occurs within the first 6 months, after which there is persistent stabilization.
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Authors
Stuart A. BAppSc, David G. BM BS, PhD, FRACS, Graham E. MBBS, FRACS, FAOrthA, Kjell G. MD, PhD, John R. DVSc, PhD,