血链球菌对磁性固位体耐腐蚀性能的影响  

The influence of Streptococcus sanguis on corrosion resistance of magnetic retainer

作　　者：胡闻奇 陈良达 王益骏 孙敦方 韩栋伟[2] 

机构地区：[1]上海市黄浦区牙病防治所,上海200002 [2]同济大学口腔医学院口腔修复科,上海200072

出　　处：《上海口腔医学》2008年第1期88-91,共4页Shanghai Journal of Stomatology

摘　　要：目的:比较磁性固位体在有、无血链菌存在的人工唾液中受腐蚀后金属离子的析出情况。方法:将磁性固位体分别置于装有人工唾液的培养瓶中,随机选取10瓶,加入血链球菌悬液,其余10瓶作为对照。培养瓶置于36℃培养箱内培养,分别于3d、10d和20d时取出5ml混悬液,送实验室检测混悬液中的Fe3+、Mn2+析出的量。分析磁性固位体金属腐蚀的情况。实验数据采用SPSS10.0软件包进行单因素配对t检验。结果:在含血链球菌的人工唾液中,磁性固位体受腐蚀释放出的Fe3+、Mn2+在3d、10d、20d时的检出量显著高于对照组(P<0.01)。结论:血链菌会明显破坏磁性固位体金属的耐腐蚀性。PURPOSE： To study the effect of Streptococcus sanguis on corrosion resistance of magnetic retainers in which are encapsulated with stainless steel artificial saliva. METHODS： A magnetic retainer was put in one culture flask,which was filled with artificial saliva.Ten of them were added Streptococcus sanguis suspension,the others were added PBS as control.The culture flasks were cultivated in incubator（36℃）.5ml suspension was dislodged from each flask at the 3rd, 10th and 20th day. The quantity of Fe^3＋ and Mn^2＋ was detected.Statistical analysis of paired t test was performed with SPSS10.0 software package. RESULTS： When Streptococcus sanguis existed, the quantity of Fe^3＋ and Mn^2＋ was significantly higher than that in the control （P〈0.01）. CONCLUSION： The existence of Streptococcus sanguis destroys the corrosion resistance of magnetic retainers remarkably.

关 键 词：磁性固位体 血链球菌 腐蚀 

分 类 号：R780.2[医药卫生—口腔医学]