白色念珠菌对钛合金及钴铬合金腐蚀影响的研究

Influence of candida albicans'adhesion on corrosion of Ti alloy and Co-Cr alloy

目的研究口腔白色念珠菌对钛合金及钴铬合金腐蚀的影响。方法将钛合金和钴铬合金随机分成空白对照组,实验对照组及实验组。在需氧环境中将白色念珠菌接种到沙保罗葡萄糖液体培养基中,试件浸在培养基中,每周更换1次培养基,并接种1次,共20周。然后用表面轮廓仪测定表面粗糙度,并进行统计学分析。结果钛合金试件空白组、实验对照组、实验组金属试件表面粗糙度均值总体之间差异无显著性。钴铬合金试件空白组、实验对照组、实验组组金属试件均值总体之间差异有显著性,两两比较,各组间差异均有显著性。结论白色念珠菌黏附钛合金表面短时间内金属表面粗糙度无明显变化,黏附钴铬合金表面粗糙度变化明显。

Objective To study the influence of candida albicans＇ adhesion on the corrosion of Co-Cr alloy and Ti alloy. Methods We measured the surface roughness of the metal pieces by 6JA interference microscope and investigated the alteration of the surface roughness of metal pieces after candida albicans＇ adhesion to the surface of the Ti alloy and Co-Cr alloy. Results For 20 weeks, Ti alloy, blank control group and metal control groups showed no influence on Ra value. As for Co-Cr alloy, the Ra values of the metal control groups without bacteria were significantly different from those of blank control groups and metal control groups. Conclusion . Compared with the no alteration of the surface roughness after candida albicans＇ adhesion to Ti alloy for some time, the surface roughness of the Co-Cr alloy altered significantly.