在不同浓度蔗糖条件下变形链球菌对镍铬合金腐蚀性能的影响  

Effects of concentrations of sucrose on Streptococcus mutans corrosion behavior to Ni-Cr alloy

作　　者：褚凤清[1,2] 王国平[1,2] 王培志[1,2] 夏露[1,3] 

机构地区：[1]南京医科大学口腔医学研究所 [2]南京医科大学附属口腔医学院种植中心,南京210029 [3]南京医科大学附属口腔医学院修复科,南京210029

出　　处：《口腔医学》2010年第8期460-463,共4页Stomatology

基　　金：江苏省高校自然科学研究基金资助项目(08KJD320010);南京医科大学科技发展基金资助项目(07NMUM050)

摘　　要：目的探讨不同浓度的蔗糖条件下,变形链球菌与镍铬合金共同培养后,合金耐蚀性能受到的影响。方法将镍铬合金制作12个试件,随机分为5.0%蔗糖实验组、5.0%蔗糖培养基对照组、1.0%蔗糖实验组及1.0%蔗糖培养基对照组。8周后分别取出做电化学实验和扫描电镜实验进行耐腐蚀性能的研究。结果电化学实验结果显示:5.0%蔗糖实验组与1.0%蔗糖实验组相比,自腐蚀电位与自腐蚀电流密度差异均不显著;5.0%蔗糖培养基对照组与1.0%蔗糖培养基对照组相比,自腐蚀电位绝对值减小,自腐蚀电流密度减小(差异均有统计学意义)。扫描电镜实验结果显示:两实验组试件表面无明显差别,与1.0%蔗糖培养基对照组比较,5.0%蔗糖培养基对照组表面出现斑块状花纹,无明显腐蚀痕迹。结论蔗糖浓度的增加对变形链球菌的生长繁殖有利,但未必会增强变形链球菌对镍铬合金表面腐蚀性的影响。Objective To study the effects of Streptococcus mutans corrosion behavior to Ni-Cr alloy on sucrose of different concentrations,in order to provide the theory for clinical application.Methods Twelve specimens of Ni-Cr alloy were fabricated and divided into four groups： 5.0% sucrose experimental group,5.0% sucrose TSB media group,1.0% sucrose experimental group and 1.0% sucrose TSB media group.After inoculating for 8 weeks,the electrochemical corrosion test and scanning electron microscope（SEM） were used.Results The electrochemical test showed that,there was no obvious difference of the Ecorr and Icorr between 5.0% sucrose experimental group and 1.0% sucrose experimental group.But compared with 1.0% sucrose TSB media group,the absolute value of Ecorr and the Icorr were decreased in 5.0% sucrose TSB media group.SEM observation showed that there was no obvious difference between two experimental groups.Compared with 1.0% sucrose TSB media group,there was some plaque on the surface of 5.0% sucrose TSB media group with no obvious signs of corrosion.Conclusion The increase of sucrose concentration is fit for the growth of Streptococcus mutans,but it does not always increase the influence of Streptococcus mutans to Ni-Co alloy.

关 键 词：变形链球菌 腐蚀 镍铬合金 蔗糖浓度 

分 类 号：R783.1[医药卫生—口腔医学]