Correlation between in vivo stresses and oxidation of UHMWPE in total hip arthroplasty
Correlation between in vivo stresses and oxidation of UHMWPE in total hip arthroplasty
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DOI：
10.1007/s10856-014-5254-9
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
M. Regis;P. Bracco;L. Giorgini;S. Fusi;P. Dalla Pria;L. Costa;C. Schmid
中科院分区：
文献类型：
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作者：
M. Regis;P. Bracco;L. Giorgini;S. Fusi;P. Dalla Pria;L. Costa;C. Schmid
研究了矫形用超高分子量聚乙烯体内应力诱导氧化的可能性。经EtO消毒，未交联的超高分子量聚乙烯衬垫，外植或货架老化，已收集。评估了线性磨损和磨损率，并使用FTIR光谱检测氧化，并建立了整个衬管段的氧化产物空间图。氧化曲线与应力分布曲线进行了比较，结果来自对相同的尾管几何形状和联轴器进行的有限元分析。发现氧化区和应力区遵循相同的不对称局部分布剖面。因此，有可能建立应力区域和观察到的氧化之间的相关性。
The possibility of in vivo, stress-induced oxidation in orthopaedic UHMWPE has been investigated. EtO sterilised, uncrosslinked UHMWPE liners, explanted or shelf-aged, have been collected. Linear wear and wear rate were assessed and FTIR spectroscopy was employed to detect oxidation and to build up oxidation products spatial maps across the liners section. Oxidation profiles have been compared to stress distribution profiles, resulting from a FE analysis conducted on the same liners geometries and couplings. It was found that oxidised and stressed areas followed the same asymmetrical, localized distribution profile. It was therefore possible to establish a correlation between stressed areas and observed oxidation.