变形链球菌黏附对2种不同抛光方式的纯钛、钛合金表面腐蚀的影响  

Study of the correlation between Streptococcus mutans’ adhesion and surface corrosion in casting titanium and Ti alloy

作　　者：沈晓艇[1] 刘丽[1] 莫康楠[1] 章燕珍[1] 梁伯贵[1] 

机构地区：[1]浙江大学医学院附属口腔医院修复科,浙江杭州310006

出　　处：《上海口腔医学》2008年第6期633-637,共5页Shanghai Journal of Stomatology

基　　金：浙江省科技公关项目(2007C33016);浙江省医药卫生科学研究基金(2008A112)~~

摘　　要：目的:研究在厌氧环境下变形链球菌粘附对2种抛光方式的纯钛及钛合金表面腐蚀的影响。方法:将牙科用纯钛、钛合金材料制备成30mm×8mm×1mm板片,各32片,分为2组,分别进行机械抛光和电化学抛光。再将每组试件随机分为空白对照组、培养基对照组、3个月实验组和6个月实验组。将试件放入各组对应的试管,置于95%N2、5%CO2、37℃环境中,细菌每周传代1次,试件按各组预定时间取出,消毒灭菌。以表面轮廓仪测试各组试件表面粗糙度变化,扫描电镜观察各组试件表面形态变化,采用SPSS11.0软件包对结果进行方差分析。结果:纯钛实验组较对照组粗糙度无显著差异(P>0.05),钛合金实验组较对照组粗糙度有显著差异(P<0.05)。同种材料2种抛光方式下的实验组和对照组粗糙度变化无显著差异。扫描电镜下可见纯钛及钛合金试件表面存在腐蚀,纯钛表面腐蚀孔较钛合金少。结论:变形链球菌黏附对纯钛、钛合金表面产生腐蚀,单纯机械抛光和电化学抛光对变形链球菌腐蚀作用的影响无显著差异。PURPOSE： To investigate the correlation between Streptococcus mutans＇ adhesion and surface corrosion of the casting titanium and Ti alloy with different kinds of polishing. METHODS： The casting titanium and Ti alloy were respectively processed into size of 30mm×8mm×1mm in tablets. Each material was prepared for 32 specimens, randomly divided into two groups, dealt with mechanical polishing and electrochemistry polishing, and then randomly divided into four groups （blank control, media control, inoculated media control for three months and six months）.Four specimens were used in each group under hypoxia conditions. The labeled specimen surfaces were then aseptically placed in the test tube with one transfer per week. The specimens were removed and sterilized. The surface roughness of specimens was measured by FTS i120 contourgraph and the alteration of the surface was observed under SIRION scanning electron microscope. One-way ANOVA was performed with SPSS11.0 software package. RESULTS： In casting titanium,blank control,media control, inoculated media control for three months and six months showed no influence on Ra value （P〉0.05）.In Ti alloy, the Ra value of the inoculated media control group was significantly different from those of blank control group （P〈0.05） and metal control group（P〈0.05）. All the specimen surfaces had pits in disorder and in different size. CONCLUSIONS： Streptococcus mutans＇ adhesion causes surface corrosion of the casting titanium and Ti alloy,and mechanical polishing and electrochemistry polishing have no influence on corrosion.

关 键 词：变形链球菌 微生物腐蚀 电化学抛光 表面粗糙度 

分 类 号：R783.1[医药卫生—口腔医学]