纳米Ag/TiO_2涂层托槽的研制及力学性能  

Development of a nanometer Ag/TiO_2 coated bracket and its mechanical properties

作　　者：张晟[1] 麦理想[2] 柳大烈[3] 章锦才[1] 

机构地区：[1]广东省口腔医院.南方医科大学附属口腔医院正畸科,广东省广州市510280 [2]中山大学光华口腔医学院.附属口腔医院正畸科,广东省广州市510055 [3]南方医科大学珠江医院整形美容科,广东省广州市510200

出　　处：《中国组织工程研究》2012年第38期7047-7052,共6页Chinese Journal of Tissue Engineering Research

基　　金：广东省医学科学技术研究基金项目(B2011040)~~

摘　　要：背景:前期实验发现纳米Ag可以原子态沉积于纳米TiO2涂层表面,增强涂层的可见光催化抗菌性能。目的:研制纳米Ag/TiO2涂层托槽,并分析其力学性能。方法:使用溶胶-凝胶法制备不同退火温度下的纳米Ag/TiO2涂层托槽,在扫描电镜下观察纳米Ag/TiO2涂层托槽的表面形貌;测量普通金属托槽、纳米TiO2涂层托槽和各组纳米Ag/TiO2涂层托槽的表面粗糙度;采用划痕实验法检测纳米TiO2涂层和各组纳米Ag/TiO2涂层与基体托槽的结合强度。结果与结论:纳米Ag/TiO2涂层厚度约120nm,为具有严整组织结构的纳米颗粒膜,表面平整、光滑、光洁度高,并可见Ag颗粒沉积在涂层上。纳米TiO2涂层托槽和各组纳米Ag/TiO2涂层托槽表面粗糙度与普通商业用托槽差别无差异(P>0.05);纳米TiO2涂层、120,200,300℃退火温度纳米Ag/TiO2涂层与基体托槽的结合强度分别为1.18,1.16,1.12,1.26kg。表明研制的纳米Ag/TiO2涂层托槽具有良好的力学性能,可以满足口腔正畸临床需要。BACKGROUND：In our prophase study,Ag can be deposited on TiO2 films,which can enhance the antibacterial effect of TiO2 coated films.OBJECTIVE：To develop a nanometer Ag/TiO2 coated bracket and to study its mechanical properties.METHODS：The nanometer Ag/TiO2 coated bracket was prepared using sol-gel method at different annealing temperatures.Scanning electron microscope was used to study the surface morphology of Ag/TiO2 coated bracket.The surface roughness of metal bracket,nanometer TiO2 coated bracket and nanometer Ag/TiO2 coated bracket was measured.The combination intensity of TiO2 and Ag/TiO2 coatings with brackets was measured by scratch test.RESULTS AND CONCLUSION：Nanometer Ag/TiO2 film was 120 nm in deepness,and it was a nanoparticle film with a thorough tissue structure.Ag particles were visibly deposited on the film surface that was flat,smooth,and highly polished.There were no significant differences among the surface roughness of nanometer TiO2 coated brackets,nanometer Ag/TiO2 coated brackets and brackets used commercially （P 0.05）.The combination intensities of nanometer TiO2 and Ag/TiO2 coatings with brackets at annealing temperatures of 120,200 and 300 ℃ were 1.18,1.16,1.12 and 1.26 kg,respectively.These findings indicated that nanometer Ag/TiO2 coated bracket was developed successfully and it had good mechanical properties that could meet the clinical demand of orthodontics.

关 键 词：正畸托槽 纳米TIO2 纳米银 表面粗糙度 结合强度 生物材料 

分 类 号：R318[医药卫生—生物医学工程]