LONG-TERM IN-VIVO AND IN-VITRO AGING OF A ZIRCONIA CERAMIC USED IN ORTHOPAEDY
LONG-TERM IN-VIVO AND IN-VITRO AGING OF A ZIRCONIA CERAMIC USED IN ORTHOPAEDY
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DOI：
10.1002/jbm.820280512
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发表时间：
1994-05-01
期刊：
影响因子：
--
通讯作者：
LILLEY, E
中科院分区：
文献类型：
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作者：
CALES, B;STEFANI, Y;LILLEY, E
详细研究了在37 ℃下老化的商业氧化锆（Y-TZP）在林格氏溶液中或移植到动物或人体内的情况。在将钛合金耳轴压入股骨头锥体（载荷高达30 kN）所产生的应力下，未发现莫尔棒或髋关节股骨头的强度降低。抛光试样老化1年后，单斜相百分比也没有增加。移植到动物体内的小样本的微压痕K-IC韧性值没有变化，表明没有降解。在人体植入2年后恢复的氧化锆股骨头显示强度没有损失。这种陶瓷的优异性能与其他研究的差异可以通过氧化锆的微观结构设计和质量来解释。(C)1994年，John Wiley and Sons，Inc.
A detailed study of a commercial zirconia (Y-TZP) aged at 37 degrees C held in Ringer's solution or transplanted in animals or humans is reported. No degradation in strength was found for MOR bars or for hip joint heads subjected to stresses caused by pressing titanium alloy trunnions into the head tapers with loads up to 30 kN. Polished specimens also showed no increase in the monoclinic phase percentage upon aging for 1 year. Small specimens transplanted in animals experience no change in the micro-indentation K-IC toughness value, suggesting no degradation. Zirconia heads recovered after 2 years of human implantation showed no loss of strength. The difference between the excellent performances of this ceramic presented here and other studies can be accounted by the microstructural design and quality of the zirconia. (C) 1994 John Wiley and Sons, Inc.