Advantages of metal-backed acetabular components for a total hip replacement: a clinical assessment with a minimum 5-year follow-up.
A group of 53 hips in which metal-backed acetabular components had been inserted with the use of bone cement were reviewed roentgenographically at an average of 6.5 years following insertion, with a minimum follow-up of 5 years. Of this group, two were excluded for special reasons. Among the remaining hips, with an average age of 41 years at the time of insertion, the incidence of acetabular component loosening was 6%. In fact, the only acetabular component loosening occurred in three patients whose surgery was done at the age of 25 years or younger. No patient over the age of 25 years demonstrated a loose acetabular component. By selecting the subset of patients age 45 years and under, we could make a comparison with a similar group of patients reported by Dorr and Takai, in whom acetabular components had been inserted without metal backing. The group with the metal-backed acetabular components had a statistically significant reduction in acetabular component loosening. These clinical data, taken in conjunction with the finite-element studies reported in Chapters 11 and 12, make a very strong case for the use of the metal-backed acetabular component. Our clinical practice, and our recommendation, is to use a metal-backed acetabular component in every cemented total hip replacement, if possible.
D000077:Acetabulum; D000293:Adolescent; D000328:Adult; D000368:Aged; D001168:Arthritis / Q000601:surgery; D001172:Arthritis, Rheumatoid / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008670:Metals; D008875:Middle Aged; D008970:Molecular Weight; D010003:Osteoarthritis / Q000601:surgery; D011183:Postoperative Complications; D011474:Prosthesis Design
D008670:Metals