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Changes in Fatty Acid Profiles of Cells Surrounding Orthopedic Implants: An Experimental Study in Rats

机译:骨科植入物周围细胞的脂肪酸谱变化:在大鼠中的实验研究

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Structural changes and reactions of surrounding tissues after implantation could contribute loosening in orthopaedic surgery. The aim was to investigate the effect of orthopedic implants on fatty acid (FA) profile of surrounding tissues. New Zealand rabbits (n=40) were assigned randomly to one of four commonly used orthopaedic implants (ceramic, titanium, polyethylene and stainless steel) and sham. One month after surgical intervention, the pseudomembranes developed in response to applications were harvested for FA and histopathology. The cellular FA profile was determined using gas chromatography. Fibrotic tissues developed in response to all implants. Fatty acid profile of cells surrounding implanted tissues was different from that of periosteoum (sham group). C was the most prevalent FA in all samples. C was absent in the stainless steel 16:0 16:1 group, whereas C was present in only in the control and ceramic groups. Fatty acid profile of the 17:1 polyethylene group was similiar to that of the ceramic group. More significantly, tissues facing titanium and stainless steel contained neutophil infiltration, lympho-plasmocytes at the center of fibrotic connective tissues, macprophages and gigantic cells. As compared with ceramics and polyethylene, metallic materials may prone to greater risk for loosing due to remarkeable structural changes in surrounding tissues facing implants.
机译:植入后,周围组织的结构变化和反应可能会导致整形外科手术松动。目的是研究整形外科植入物对周围组织的脂肪酸(FA)轮廓的影响。将新西兰兔(n = 40)随机分配到四种常用的骨科植入物(陶瓷,钛,聚乙烯和不锈钢)和假手术中的一种。手术干预一个月后,收集了针对应用而产生的假膜用于FA和组织病理学检查。使用气相色谱法测定细胞FA轮廓。纤维化组织响应于所有植入物而发育。植入组织周围细胞的脂肪酸分布与骨膜(假手术组)不同。 C是所有样品中最普遍的FA。不锈钢16:0 16:1组中不存在C,而对照组和陶瓷组中仅存在C。 17:1聚乙烯基团的脂肪酸分布与陶瓷基团相似。更重要的是,面对钛和不锈钢的组织包含嗜中性粒细胞浸润,纤维化结缔组织中心的淋巴浆细胞,巨噬细胞和巨大细胞。与陶瓷和聚乙烯相比,由于面向植入物的周围组织中明显的结构变化,金属材料可能会出现更大的松动风险。

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