Three metal-on-metal hip replacement devices from the same manufacturer A short- to midterm survival

摘要

The aim of this retrospective study was to evaluate short- to midterm results of three different metal-on-metal hip devices from the same manufacturer. A total of 329 hip operations were performed in a single academic unit between 2004 and 2010 using either Birmingham hip resurfacing or Synergy - Birmingham and Synergy - R3 total hip arthroplasty. The overall survival rate at the end of the follow-up time for Birmingham hip resurfacing was 88%, for Synergy - Birmingham total hip arthroplasty 95%, and for Synergy - R3 total hip arthroplasty 81% (p = 0.036). Five revision operations were performed due to adverse reaction to metal debris. Head sizes > 50 mm had lower revision rates compared to smaller ones. Synergy - R3 had a poor survival already at short term. The mid-term survival of Birmingham hip resurfacing arthroplasty was inferior compared to previous studies.