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J Arthroplasty. 2013 May;28(5):867-71. doi: 10.1016/j.arth.2012.10.019. Epub 2013 Mar 13.

Metal on metal total hip arthroplasty using modular acetabular shells.

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University of Iowa Hospitals and Clinics, Iowa City, Iowa 52242, USA.


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.

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