Abstract
113 Bateman UPF II arthroplasties with a straight, non-cemented, nonfenestrated, Moore type stem were used in 106 patients with degenerative hip disease. The patients were followed for a mean of 5 years and 8 months (range 48-102 months). 20 patients had died. There were therefore 93 hips available for review. Of these 91 were contacted. Of the 91 hips, 15 had been revised for stem loosening, and 6 more had gross radiological evidence of stem loosening in the absence of symptoms.
In contrast to the stem failures, the bipolar acetabular component of this prosthesis gave no clinical problems. Radiologically there were 5 patients who showed evidence of acetabular migration, but in all of these cases the migration was 4 millimetres or less.
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