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首页> 外文OA文献 >Characterization of wear debris released from alumina-on-alumina hip prostheses: Analysis of retrieved femoral heads and peri-prosthetic tissues
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Characterization of wear debris released from alumina-on-alumina hip prostheses: Analysis of retrieved femoral heads and peri-prosthetic tissues

机译：氧化铝 - 氧化铝髋关节假体释放的磨损碎屑的表征：回收的股骨头和假体周围组织的分析

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摘要

We analyzed by SEM three alumina-on-alumina femoral heads obtained from three patients who underwent revision for an aseptic loosening of the acetabular component. In parallel, the peri-prosthetic tissues were analyzed histologically in search of wear debris coming from the ceramic. Stripe wears, abrasive streaks, craters, and areas with extensive biomaterial removal were evidenced on the three femoral heads by SEM. In the altered area, the structure of the ceramic composed of minute polyhedric grains packed together was evidenced. In the peri-prosthetic tissues, the alumina particles were present in different forms: larges particles appeared transparent and birefringent, small particles engulfed by the macrophages had a light brown tint and were not birefringent. Large particles corresponded to the grains observed by SEM. EDS microanalysis confirmed the presence of aluminum oxide in these particles. Alumina debris are difficult to identify microscopically due to their pleomorphism.
机译：我们通过SEM分析了从三名因髋臼假体无菌性松动而接受翻修的患者中获得的三个氧化铝对氧化铝的股骨头。平行地，对假体周围组织进行了组织学分析，以寻找来自陶瓷的磨损碎片。扫描电镜在三个股骨头上发现了条纹磨损，磨蚀性条纹，火山口以及生物材料被大量去除的区域。在改变的区域中，证实了由堆积在一起的微小多面体晶粒组成的陶瓷的结构。在假体周围组织中，氧化铝颗粒以不同的形式存在：大颗粒呈透明双折射，被巨噬细胞吞噬的小颗粒呈浅棕色，而不呈双折射。大颗粒对应于通过SEM观察到的晶粒。 EDS微量分析证实了这些颗粒中存在氧化铝。氧化铝碎片由于其多态性而难以在显微镜下识别。

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