Wear testing of UHMWPE tibial components: Influence of oxidation

被引：17

作者：

Young, SK

Keller, TS

Greer, KW

Gorhan, MC

机构：

[1] Univ Vermont, Dept Mech Engn, Burlington, VT 05405 USA

[2] Depuy Orthopaed Inc, Polymer Res & Dev, Warsaw, IN USA

[3] Neuro Intens Care Unit, Raynham, MA 02767 USA

来源：

JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME | 2000年 / 122卷 / 01期

关键词：

D O I：

10.1115/1.555362

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 [机械工程];

摘要：

An AMTI knee stimulator was used to evaluate the wear of UHMWPE tibial inserts which were gamma sterilized in air and displayed a high or low level of oxidation. After 5 million cycles, four out of five samples from the high oxidation group displayed subsurface cracking and/or delamination. The five specimens in the low oxidation group experienced burnishing only. These results indicate that gamma irradiation in air together with high oxidation due to shelf aging can increase susceptibility to wear. The appearance of the wear scars indicates that knee simulator testing is a valid method of producing burnishing, cracking, and delamination similar to that seen in-vivo.

引用

页码：323 / 331

页数：9

共 45 条

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