title: Metal on metal total hip arthroplasty using modular acetabular shells.
abstract: Metal on metal bearings were reintroduced into the United States for use in total hip arthroplasty approximately a decade ago. We evaluated a consecutive series cohort of 148 patients with 169 hips who underwent THR using a metal on metal bearing surface with a modular acetabular shell that had fixation augmentation with dome screws. At 3 to 8 year follow-up, average 4.7 years, only one component was revised (for femoral loosening). 3 hips demonstrated proximal femoral osteolysis and 3 hips demonstrated pelvic osteolysis. The average follow-up Harris Hip Score was 94 (range, 57-100). Although the results have been excellent, we continue to closely monitor these hips for any long term failures, or concerns.
authors.affiliation: University of Iowa Hospitals and Clinics, Iowa City, Iowa 52242, USA.
authors.forename: Adam A
authors.initials: AA
authors.lastname: Liudahl
authors.forename: Steve S
authors.initials: SS
authors.lastname: Liu
authors.forename: Devon D
authors.initials: DD
authors.lastname: Goetz
authors.forename: Craig R
authors.initials: CR
authors.lastname: Mahoney
authors.forename: John J
authors.initials: JJ
authors.lastname: Callaghan
mesh_terms: D000328:Adult; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D061825:Metal-on-Metal Joint Prostheses; D008875:Middle Aged; D011474:Prosthesis Design; D012086:Reoperation