不同生存状态变形链球菌对纯钛表面腐蚀影响的研究  

Corrosion behavior of pure titanium in the presence of Streptococcus mutans under different living conditions

作　　者：曾凯[1] 魏蔚[1] 杨焰[1] 朱其亮[2] 朱伟[1] 马净植[1] 

机构地区：[1]华中科技大学同济医学院附属同济医院口腔医学中心,湖北武汉430030 [2]中国地质大学(武汉)材料与化学学院,湖北武汉430074

出　　处：《临床口腔医学杂志》2017年第3期148-152,共5页Journal of Clinical Stomatology

基　　金：国家自然科学基金资助项目(81641035;81401524);武汉市科学技术计划项目(2015010202010094)

摘　　要：目的:研究不同生存状态变形链球菌对纯钛材料表面腐蚀的影响。方法:以不含细菌的脑心浸液培养液(brian heart infusion,BHI)处理钛片为空白对照组;以BHI常规培养和营养-饥饿(BHI-phosphate buffer saline,PBS)循环培养的变形链球菌菌液处理钛片为实验组。各组均每2 d更换1次培养液,处理第7 d取出钛片进行电化学检测和扫描电镜观察。结果:与空白对照组相比,两实验组表面阻抗、阻抗模量、低频相位角和极化电阻均降低,但两实验组之间对比,并无统计学意义(P>0.05)。扫描电镜下可见两实验组钛片表面散在腐蚀缺陷。结论:在本实验测试条件下,不同生存状态变形链球菌均促进纯钛表面腐蚀,且其腐蚀能力不受营养条件的影响。Objective：To investigate the surface corrosion behavior of pure titanium in the presence of Streptococcus mutans（S.Mutans） under different living conditions .Method：Brian heart infusion（BHI）medium treated titanium discs were served as blank control .Titanium discs treated with BHI and BHI-phosphate buffer saline （ PBS） cultured S.Mutans respec-tively were served as the experiment groups .Culture medium in each group was changed every 2 days.After 7 days,samples were obtained for electrochemical tests and scanning electron microscopy （ SEM ） observation .Results：The surface imped-ance, impedance modulus,low-frequency phase angle and polarization resistance （Rp） of titanium discs in two experimental groups were all decreased , compared with those of blank control group ,but there was no significant difference between two experimental groups（P〉0.05）.Corrosion defects were observed on bacterial treated titanium surfaces from SEM tests .Con-clusion：Under the condition of the present study ,S.Mutans could accelerate the surface corrosion of pure titanium ,and the corrosion ability was not influenced by nutrition conditions .

关 键 词：变形链球菌 钛 饥饿 腐蚀 

分 类 号：R783.1[医药卫生—口腔医学]