Gouge features on metal-on-metal hip bearings can result from high stresses during rim contact

被引：2
|
作者：
Currier, John H. [1 ]
McHugh, Dermott J. [1 ]
Tower, Dana R. [1 ]
Kennedy, Francis E. [1 ]
Van Citters, Douglas W. [1 ]
机构：
[1] Dartmouth Coll, Thayer Sch Engn, Hanover, NH 03755 USA
来源：
TRIBOLOGY INTERNATIONAL | 2013年 / 63卷
关键词：
Wear; Metal-on-metal hips; Plastic indentation; Impact; SURFACE REPLACEMENT; WEAR DEBRIS; ION LEVELS; FAILURE; MICROSEPARATION; ARTHROPLASTY; PROSTHESES; MECHANICS; COMPONENT; SIZE;
D O I：
10.1016/j.triboint.2012.04.014
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Surface gouges were observed on the femoral heads of eight different retrieved metal-on-metal (MoM hip) designs, and 87% of 76 hips studied. The gouges appear to be plastically deformed indentations from edge contact; their occurrence is inconsistent with retrieval artefact. Gouge geometry is consistent with the indentations predicted by computer modeling of head-to-rim contact resulting from subluxation of the head out of the acetabular cup. The surface gouging observed in this study suggests that bearing damage due to micro-separation and subsequent edge loading is common among all designs of MoM hips and can be an important factor in clinical performance. (C) 2012 Elsevier Ltd. All rights reserved.
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页码：89 / 96
页数：8
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