基于磁控溅射的PEEK表面HA涂层构建及其生物安全性评估

Construction of HA coating on PEEK surface based on magnetron sputtering and its biosafety evaluation

目的:基于磁控溅射技术在PEEK表面构建羟基磷灰石(HA)涂层,并系统评估该方法的生物安全性。方法:磺化PEEK以增加结合面积,并利用磁控溅射技术在其上构建HA涂层;通过扫描电镜结合能谱分析检测构建效果;通过细胞黏附实验、细胞骨架荧光染色以及扫描电镜来评估细胞层面安全性;通过SD大鼠全身毒性评估材料在体安全性;通过金黄地鼠黏膜刺激实验评估材料口腔应用安全性。结果:利用上述技术可在PEEK表面成功构建具有梯度形貌的HA涂层;该涂层可促进细胞黏附、伸展与增殖;且无全身毒性,对动物体重与体内重要脏器HE染色均无显著性影响(P>0.05);同时该涂层在一定程度上减轻了单纯磺化带来的口腔黏膜刺激。结论:基于磁控溅射技术可稳定制备HA涂层,并满足临床应用的生物安全性需求。

Objective:To prepare hydroxyapatite(HA)coating on polyether ether ketone(PEEK)surface by magnetron sputtering technique and to study its biosafety.Methods:Sulfonated PEEK was used to increase the binding area and HA coating was constructed on it using magnetron sputtering technology.SEM and energy dispersive spectroscopy(EDAX)were used to detect the construction effect.Cell adhesion assay,cytoskeletal fluorescence staining and SEM validation were used to assess cytologrcal safety.In vivo safety tests were conducted in SD rats and golden hamsters.Results:HA coating with gradient morphology was successfully constructed on the PEEK surface using above technique.The coating promoted cell adhesion,extension and proliferation.No systemic toxicity and no significant influence in HE staining of the main infernal organs samples were observed.The coating alleviated the oral mucosal irritation caused by simple sulfonation to a certain extent.Conclusion:HA coating can be prepared stably with magnetron sputtering technology and can meet the biosafety needs for clinical applications.