Activity levels and polyethylene wear of patients 10 years post hip replacement.

摘要

BACKGROUND: Wear of the acetabular cup and implant loosening in total hip arthroplasty are thought to be affected by individual patient activity levels. METHODS: Activity levels of 100 patients with unilateral primary hip replacements were measured using a digital pedometer 10-years post-operatively. FINDINGS: Activity rates of hip replacement patients 10 years post surgery were found to fall with increasing age strata, with the age group 70-74 years showing significantly reduced activity rates compared to the 55-64 years age group and the age group greater than 80 years showing significantly reduced activity rates compared to both the 55-64 years age group and the 65-69 years age group. However, a clear correlation between age and activity was not found. Acetabular cup wear showed no relationship with patient activity levels. INTERPRETATION: Progressive reduction in activity levels with more elderly hip replacement patients may inform long term planning of hip arthroplasty and implant choice.