1140 THE JOURNAL OF BONE AND JOINT SURGERY Further Follow-up on Socket Fixation using a Metal-Backed Acetabular Component for Total Hip Replacement

data after a minimum five-year follow-up of fifty-three total hip replacements in forty-seven patients in whom a cemented metal-backed acetabular component had been used6. There actually had been fifty-four total hip replacements in fifty-three hips, as in one hip a revision was done for a traumatic disruption of the initial ace-tabular component that occurred two months after the first insertion. Six of the fifty-four operations did not qualify for inclusion in this ten-year follow-up study, including four operations in three patients who had died before that time. The remaining forty-eight hips have been followed for ten to 13.5 years (mean, 11.3 years). With one ex-ception, the ages of the patients at the time of the index operation ranged from seventeen to fifty years (mean