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J Arthroplasty. 2012 Jun;27(6):976-83.e1. doi: 10.1016/j.arth.2012.01.019. Epub 2012 Mar 14.

Large-diameter modular metal-on-metal total hip arthroplasty: incidence of revision for adverse reaction to metallic debris.

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Valley Orthopedic Associates, Proliance Surgeons, Joint Center at Valley Medical Center, Renton, Washington 98055, USA.


Large-diameter modular metal-on-metal (MOM) total hip arthroplasty (THA) may offer reduction in wear debris and improved stability. Four studies are summarized here that used a large-diameter modular MOM system. A total of 1076 THAs were performed. This article presents data from 779 of these THAs with minimum 2-year follow-up (mean, 4.2 years) or revision since index THA (21 hips, with 1 more pending). Overall survivorship at 2 years was 98.6%; at 5 years, it was 97.0%. Seven revisions for an adverse reaction to metallic debris (ARMED), and 1 additional pending revision for ARMED, showed marked variability in presenting symptoms and intraoperative and postoperative findings. Data show good clinical performance of the modular MOM system, but suggest that surgeons must be diligent in monitoring MOM THA patients and aggressive in diagnosing and revising patients with a potential ARMED.

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