Bioengineering reasons for the failure of metal-on-metal hip prostheses AN ENGINEER'S PERSPECTIVE

被引：61
|
作者：
Fisher, J. [1 ]
机构：
[1] Univ Leeds, Inst Med & Biol Engn, Sch Mech Engn, Leeds LS2 9JT, W Yorkshire, England
来源：
JOURNAL OF BONE AND JOINT SURGERY-BRITISH VOLUME | 2011年 / 93B卷 / 08期
基金：
英国工程与自然科学研究理事会;
关键词：
WEAR DEBRIS; CUP ANGLE; MICROSEPARATION; REPLACEMENTS; BEARINGS; FRICTION; LUBRICATION;
D O I：
10.1302/0301-620X.93B8.26936
中图分类号：
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学（修复外科学）];
学科分类号：
摘要：
Bioengineering reasons for increased wear and failure of metal-on-metal (MoM) bearings in hip prostheses have been described. Low wear occurs in MoM hips when the centre of the femoral head is concentric with the centre of the acetabular component and the implants are correctly positioned. Translational or rotational malpositioning of the components can lead to the contact-patch of the femoral component being displaced to the rim of the acetabular component, resulting in a ten- to 100-fold increase in wear and metal ion levels. This may cause adverse tissue reactions, loosening of components and failure of the prosthesis.
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页码：1001 / 1004
页数：4
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