Surface Characterization and Cell Response of Binary Ti-Ag Alloys with CP Ti as Material Control  

作　　者：B.B. Zhang K.J. Qiu B.L. Wang L. Li Y.F. Zheng 

机构地区：[1]Center for Biomedical Materials and Engineering, Harbin Engineering University, Harbin 150001, China [2]Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China

出　　处：《Journal of Materials Science & Technology》2012年第9期779-784,共6页材料科学技术（英文版）

基　　金：supported by the National Basic Research Program of China ("973 Program", Nos.2012CB619102 and 2012CB619100);the National High Technology Research and Development Program of China ("863 Program", Nos. 2011AA030101 and2011AA030103);the National Natural Science Foundation of China (Nos. 31170909 and 51041004);the Research Fund for the Doctoral Program of Higher Education (No. 20100001110011);the Fundamental Research Funds for the Central Universities (Nos. HEUCFZ1017and HEUCFR1020);the Natural Science Foundation of Heilongjiang Province, China (No. ZD201012)

摘　　要：In this study, the surface passive films, dissolution behavior and biocompatibility of Ti-Ag alloys （with 5%, 10% and 20% Ag） were evaluated by X-ray diffraction （XRD） tests, electrochemical corrosion tests, X-ray photoelectron spectroscopy （XPS） tests, dissolution tests and in-vitro cytotoxicity tests. The surface films on the Ti-20Ag alloy are rich in Ti and much deficient in Ag with respect to alloy composition, as identified by XPS. Compared to CP Ti, Ti-SAg and Ti-20Ag alloys show larger impedances and lower capacitances, which can be associated with an increase of the passive layer thickness. Moreover, all Ti-Ag alloys exhibit negligible or low metal release in the test solutions. The in-vitro cytotoxicity results show Ti-Ag alloys seem to be as cytocompatible as CP Ti. From the viewpoint of surface passive film and cytotoxicity, Ti-SAg and Ti-20Ag are considered to be more suitable for dental applications.In this study, the surface passive films, dissolution behavior and biocompatibility of Ti-Ag alloys （with 5%, 10% and 20% Ag） were evaluated by X-ray diffraction （XRD） tests, electrochemical corrosion tests, X-ray photoelectron spectroscopy （XPS） tests, dissolution tests and in-vitro cytotoxicity tests. The surface films on the Ti-20Ag alloy are rich in Ti and much deficient in Ag with respect to alloy composition, as identified by XPS. Compared to CP Ti, Ti-SAg and Ti-20Ag alloys show larger impedances and lower capacitances, which can be associated with an increase of the passive layer thickness. Moreover, all Ti-Ag alloys exhibit negligible or low metal release in the test solutions. The in-vitro cytotoxicity results show Ti-Ag alloys seem to be as cytocompatible as CP Ti. From the viewpoint of surface passive film and cytotoxicity, Ti-SAg and Ti-20Ag are considered to be more suitable for dental applications.

关 键 词：Ti-Ag alloy SURFACES Electrochemical corrosion CYTOTOXICITY 

分 类 号：TQ351.0[化学工程] TH77[机械工程—仪器科学与技术]