Abstract
We investigated the clinical and radiographic outcome of 35 Lord-type noncemented total hip arthroplasties (THAs) in 30 patients who were aged 70 years or older at surgery and were followed for a minimum of 5 (mean 7.0) years. The mean Harris hip score was 38.6±9.3 before surgery and 85.6±9.1 after 5 years of follow-up. Eighty-nine percent of the patients were satisfied with the functional outcome. Reoperation was done on two hips (6%) because of aseptic loosening—revision of both stem and cup in one, and revision of the stem in one. At the 5-year examination, stem subsidence occurred more frequently with the smooth-surfaced stem (Polarisee and LFR prostheses) than the bead-coated stem (Madreporic and Mark-II prostheses) (p<0.05). By setting the endpoint at the time when revision was performed, or cup migration or stem subsidence by 5 mm or more was radiographically confirmed, the 10-year survival rate of the threaded cup, bead-coated stem, and smooth-surfaced stem was 75.8%, 95.5%, and 70.5%, respectively. In conclusion, a long stem with full or extensive bead coating that is fixed without cement should be an effective option for THA in older patients.
Published Version
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