Range of Clinical Wear Performance in Cemented Acetabular Components

Range of Clinical Wear Performance in Cemented Acetabular Components 

Chamley and coworkers first developed radiographic techniques for evaluating the wear rate of UHMWPE acetabular components in patients. In 1973, Chamley and Cupic reported on the long-term wear performance in the first cohort of patients to receive a UHMWPE component between November 1962 and December 1963. During this time period, 170 patients received a cemented LFA with an UHMWPE component a total of 185 acetabular cups were implanted. Because of the elderly population originally implanted with the components, many had died or were too infirm to travel to the clinic for followup examination (more than two-thirds of the patients were older than 60 years of age at the time of implantation). Thus, only 106 out of the original 185 UHMWPE cups could still be evaluated after 9 or 10 years of implantation. The complications for this series included a 4-6% rate of infection, 1-2% rate of mechanical loosening, and a 2% incidence of late dislocation. 

Produced between 1968 and 1975, the configuration of the wire marker was similar to that used in Chamley and Cupic s study. 

Histogram showing the distribution of wear measured radiographically in Charnley and Cupic s study (1973). 

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RANGE OF CLINICAL WEAR PERFORMANCE IN CEMENTED ACETABULAR COMPONENTS... 

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