Three metal-on-metal hip replacement devices from the same manufacturer--a short- to mid-term survival
Kostensalo, I.; Junnila, M.; Mokka, J.; Virolainen, P.; Vahlberg, T.; Mäkelä, K.T.
Acta Orthopaedica Belgica 80(2): 222-227
2014
ISSN/ISBN: 0001-6462 PMID: 25090796 Document Number: 672998
The aim of this retrospective study was to evaluate short- to mid-term 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.