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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Multitechnique characterization of articular surfaces of retrieved ultrahigh molecular weight polyethylene acetabular sockets.
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Multitechnique characterization of articular surfaces of retrieved ultrahigh molecular weight polyethylene acetabular sockets.

机译：检索到的超高分子量聚乙烯髋臼窝关节表面的多技术表征。

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摘要

The articular surfaces of 10 retrieved ultrahigh molecular weight polyethylene acetabular sockets were studied by optical microscopy, X-ray fluorescence spectrometry, multiple internal reflectance FTIR spectroscopy, scanning electron microscopy, and wavelength dispersive X-ray microanalysis. The results revealed characteristic wear patterns including polishing, scratching, pitting, cratering, folding, shredding, burnishing, cracking, embedding of particles, and development of acquired biofilms with various degrees of mineralization. The biofilms formed were mainly of proteinaceous origin, and mineralized regions were composed of calcium phosphates with carbonate impurities. The crystallinity of the polyethylene at the articular surfaces was enhanced compared to the bulk, which was possibly due to the cold work produced in vivo. The mineralized regions were classified into two groups based on the grey levels of the backscattered images obtained. The high-contrast regions that were mainly composed of Ca and P with traces of Al and Si were associated with bone fragments; the low-contrast regions composed of K, Na, Ca, Mg, Si, Al, Fe, Cl, and P were associated with acquired biofilm calcification, which implies the active engagement of biofilms in the long term performance of acetabular sockets in vivo. Copyright 1999 John Wiley & Sons, Inc.
机译：通过光学显微镜，X射线荧光光谱，多次内反射FTIR光谱，扫描电子显微镜和波长色散X射线显微分析研究了10个取回的超高分子量聚乙烯髋臼窝的关节表面。结果揭示了特征性的磨损模式，包括抛光，刮擦，点蚀，缩孔，折叠，切碎，打磨，破裂，颗粒嵌入以及获得的具有不同矿化程度的生物膜的形成。形成的生物膜主要是蛋白质来源的，而矿化的区域则由具有碳酸盐杂质的磷酸钙组成。与本体相比，聚乙烯在关节表面的结晶度得到了增强，这可能是由于体内冷加工所致。根据获得的反向散射图像的灰度等级，将矿化区域分为两组。高对比度区域主要由Ca和P以及痕量的Al和Si构成，并与骨骼碎片相关。由K，Na，Ca，Mg，Si，Al，Fe，Cl和P组成的低对比度区域与获得的生物膜钙化有关，这意味着生物膜在髋臼窝体内的长期性能中会积极参与。版权所有1999 John Wiley＆Sons，Inc.

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