TiN涂层对牙科钴铬合金抗菌腐蚀性能的影响  

Effect of titanium nitride coating on bacterial corrosion resistance of dental Co-Cr alloy

作　　者：邹洁[1] 陈洁[1] 胡滨[1] 

机构地区：[1]上海交通大学医学院附属第九人民医院·口腔医学院口腔修复科,上海市口腔医学重点实验室,上海200011

出　　处：《上海口腔医学》2010年第2期173-177,共5页Shanghai Journal of Stomatology

基　　金：上海市科学技术委员会资助项目(08DZ2271100);上海市重点学科建设项目(S30206)~~

摘　　要：目的:研究氮化钛膜对临床用钴铬(Co-Cr)合金抗菌腐蚀性能的影响。方法:选取临床常用的钴铬合金,制作成10mm×10mm×3mm规格的试件,采用电弧离子镀物理气相沉积技术,在其表面沉积一层厚为2.5μm的TiN涂层。将涂层前后的试件分别置于有变形链球菌或黏性放线菌的液体培养基中共同培养,以单纯培养基作为对照。24h后,运用电化学实验对所有试件进行极化曲线分析。结果:塔菲尔极化曲线图形显示,未镀膜的Co-Cr合金与变形链球菌或黏性放线菌共同培养后,自腐蚀电位更负,钝化区间变短。而镀膜后合金与细菌共同培养,极化曲线的变化不明显,细菌对合金的腐蚀作用与镀膜前相比显著减弱。结论:氮化钛膜使Co-Cr合金能耐受细菌的作用,提高材料的抗菌腐蚀性能。PURPOSE：To study the influence of titanium nitride （TiN） coating on bacterial corrosion resistance of clinically used Co-Cr alloy. METHODS：The Co-Cr alloy commonly used for casting metal full crown was casted with specimen 10mm×10mm×3mm in size. The specimen was coated with a thickness of 2.5μm TiN coating on the surface by multi-arc physical vapor deposition. Then the specimen before and after coating titanium nitride were exposed to TSB media with S.mutans or Actinomyces viscosus,while pure media,as control.After inoculated for 24 hours,the Tafel polarization curves of the specimen were measured by electrochemical station. RESULTS：From the Tafel polarization curves,the non-coated Co-Cr alloy showed that corrosion potential moved to the negative way in presence of oral bacteria,and passivation interval got shorter.While the polarization curves of the specimen after coating TiN changed slightly in presence of oral microorganism. The TiN significantly weakened the corrosion action of bacteria on the alloy. CONCLUSIONS：These results demonstrate that the TiN coating with better tolerance to the bacterial action can improve bacterial corrosion resistance of Co-Cr alloy.

关 键 词：TIN涂层 Co-Cr合金 极化曲线 变形链球菌 黏性放线菌 抗菌腐蚀性能 

分 类 号：R783.1[医药卫生—口腔医学]