High Prevalence of Adverse Reactions to Metal Debris in Small-headed ASR™ Hips

• DOI: 10.1007/s11999-013-3023-6
• Publication Date: 2013-05-01T01:34:17Z
• Authors: Aleksi Reito; Timo Puolakka; Petra Elo; Jorma Pajamäki; Antti Eskelinen
• Keywords: Hip resurfacing

There has been increasing concern of metal-on-metal (MOM) hip replacements regarding adverse reactions to metal debris. Information prevalence and risk factors for these is scarce.The primary purposes our study were determine (1) the debris among patients who received small-headed (< 50 mm) Articular Surface Replacement (ASR™) prostheses in resurfacing procedures or ASR™ XL during THAs at institution, (2) if they are different compared with THAs?Small-headed used 482 operations (424 patients) institution. After recall prostheses, we established a systematic screening program find At mean 4.9 years (range, 0.2-8.1 years) postoperatively, 379 (435 hips) attended program, which consisted clinical evaluation, whole blood cobalt chromium measurements, cross-sectional imaging.At followup, 162 hips (34%) have revised. The majority (85%) revised owing causes related 7-year survivorship was 51% replacement cohort 38% THA cohort, respectively. Reduced cup coverage an independent factor both cohorts. High preoperative ROM, use Corail(®) stem, female gender associated increased only undergoing THA.Adverse common prostheses. Risk differ between THAs. Our results suggest more complicated failure mechanism than procedures.