The 6-Year Migration Characteristics of a Hydroxyapatite-Coated Femoral Stem: A Radiostereometric Analysis Study

Stuart Callary, David Campbell, Graham Mercer, Kjell-Gunnar Nilsson, John Field

    Research output: Contribution to journalArticle

    17 Citations (Scopus)

    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, -0.33 to 3.68 mm); the mean rotation into retroversion was 1.41° (range, -1.33° 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.

    Original languageEnglish
    Pages (from-to)1344-1348
    Number of pages5
    JournalJournal of Arthroplasty
    Volume27
    Issue number7
    DOIs
    Publication statusPublished - 2012

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