期刊
JOURNAL OF BONE AND JOINT SURGERY-BRITISH VOLUME
卷 93B, 期 9, 页码 1169-1177出版社
BRITISH EDITORIAL SOC BONE JOINT SURGERY
DOI: 10.1302/0301-620X.93B9.26511
关键词
-
资金
- British Orthopaedic Association (BOA)
- Engineering and Physical Sciences Research Council [EP/G026114/1] Funding Source: researchfish
- EPSRC [EP/G026114/1] Funding Source: UKRI
The Articular Surface Replacement (ASR) hip resurfacing arthroplasty has a failure rate of 12.0% at five years, compared with 4.3% for the Birmingham Hip Resurfacing (BHR). We analysed 66 ASR and 64 BHR explanted metal-on-metal hip replacements with the aim of understanding their mechanisms of failure. We measured the linear wear rates of the acetabular and femoral components and analysed the clinical cause of failure, pre-revision blood metal ion levels and orientation of the acetabular component. There was no significant difference in metal ion levels (chromium, p = 0.82; cobalt, p = 0.40) or head wear rate (p = 0.14) between the two groups. The ASR had a significantly increased rate of wear of the acetabular component (p = 0.03) and a significantly increased occurrence of edge loading (p < 0.005), which can be attributed to differences in design between the ASR and BHR. The effects of differences in design on the in vivo wear rates are discussed: these may provide an explanation as to why the ASR is more sensitive to suboptimal positioning than the BHR.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据