In vivo severe corrosion and hydrogen embrittlement of retrieved modular body titanium alloy hip-implants.
In vivo severe corrosion and hydrogen embrittlement of retrieved modular body titanium alloy hip-implants.
复制标题
DOI：
10.1002/jbm.b.31171
复制
发表时间：
2009-01
影响因子：
3.4
通讯作者：
Gilbert, Jeremy L.
中科院分区：
文献类型：
--
作者：
Rodrigues, Danieli C.;Urban, Robert M.;Jacobs, Joshua J.;Gilbert, Jeremy L.
钛合金具有优异的力学性能、生物相容性、钝性和耐腐蚀性，被广泛应用于全关节置换术。然而，修复研究指出，当氧化膜发生机械磨损(微动)时，这些材料在模块界面上可能受到局部或普遍的腐蚀。模块化增加了较大的缝隙环境，这些环境受到接触界面和表面差异曝气之间的微小运动的影响。众所周知，钛合金也容易吸氢，这会导致氢化物的析出和随后的脆性破坏。在这项工作中，三种设计的回收髋关节种植体在柄内具有Ti-6Al-4V/Ti-6Al-4V模块锥形界面的表面进行了研究，以证明在模块连接的微动-缝隙腐蚀过程中存在严重的腐蚀和脆性氢化物的析出。这些装置是从患者身上取出的，并通过扫描电子显微镜(SEM)、X射线衍射(X射线衍射)和化学分析等手段进行了研究。表面定性研究表明，匹配界面的腐蚀严重，有腐蚀、点蚀、分层和表面开裂的迹象。在活体中，氢脆被证明是模块连接退化的一种机制，这是由于在微动-缝隙腐蚀过程中锥体缝隙环境中的电化学反应引起的。
Titanium alloys are widely used in total-joint replacements due to a combination of outstanding mechanical properties, biocompatibility, passivity and corrosion resistance. Nevertheless, retrieval studies have pointed out that these materials can be subjected to localized or general corrosion in modular interfaces when mechanical abrasion of the oxide film (fretting) occurs. Modularity adds large crevice environments, which are subject to micromotion between contacting interfaces and differential aeration of the surface. Titanium alloys are also known to be susceptible to hydrogen absorption, which can induce precipitation of hydrides and subsequent brittle failure. In this work, the surface of three designs of retrieved hip-implants with Ti-6Al-4V/Ti-6Al-4V modular taper interfaces in the stem were investigated for evidence of severe corrosion and precipitation of brittle hydrides during fretting-crevice corrosion in the modular connections. The devices were retrieved from patients and studied by means of scanning electron microscopy (SEM), x-ray diffraction (XRD) and chemical analysis. The surface qualitative investigation revealed severe corrosion attack in the mating interfaces with evidence of etching, pitting, delamination and surface cracking. In vivo hydrogen embrittlement was shown to be a mechanism of degradation in modular connections resulting from electrochemical reactions induced in the crevice environment of the tapers during fretting-crevice corrosion.
登录
查看更多内容
DOI：
10.1002/jbm.820170308
发表时间：
1983-01-01
期刊：
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH
影响因子：
--
作者：
GRIFFIN, CD;BUCHANAN, RA;LEMONS, JE
通讯作者：
LEMONS, JE
影响因子：
5
作者：
Barril, S;Mischler, S;Landolt, D
通讯作者：
Landolt, D
影响因子：
2.8
作者：
BROWN, SA;HUGHES, PJ;MERRITT, K
通讯作者：
MERRITT, K
DOI：
10.1002/jbm.b.10526
发表时间：
2003-02-15
影响因子：
3.4
作者：
Goldberg, JR;Gilbert, JL
通讯作者：
Gilbert, JL
DOI：
10.1007/bf02647828
发表时间：
1982-01-01
期刊：
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
影响因子：
--
作者：
HACK, JE;LEVERANT, GR
通讯作者：
LEVERANT, GR