The 6-year migration characteristics of a hydroxyapatite-coated femoral stem: a radiostereometric analysis study.
prospective_cohort · Level II
Where this comes from
- Record sourced from PubMed, PMID 22266049.
- Also identified by DOI 10.1016/j.arth.2011.12.002.
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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.
Medical subject headings
- Durapatite
- Femur
- Hip Prosthesis
- Prosthesis Failure
- Radiostereometric Analysis
Anatomy
- femur
- hip