COMPARATIVE STUDY OF CLINICALLY USED NiTi ORTHODONTIC WIRES

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	COMPARATIVE STUDY OF CLINICALLY USED NiTi ORTHODONTIC WIRES
	Q. A. Wang; Y. Zhang; F. Y. Hao; K. Yang; L. L. Tan
	2010
发表期刊	International Journal of Modern Physics B
ISSN	0217-9792
卷号	24 期号:30 页码:5929-5937
摘要	The purpose of the study was to comparatively investigate two NiTi orthodontic wires. It is valuable to determine the phase transformation temperature and corrosion characteristics of the orthodontic wires to further study the shape memory effect and corrosion resistance properties. Optical microscope and EDX analysis were used for microstructure characteristics and composition analysis. Differential scanning calorimetry (DSC) was carried out to identify the phase transformation behavior of the two wires. Electrochemical tests in artificial saliva at 37 +/- 1 degrees C including polarization and electrochemical impedance spectroscopy (EIS) were used to assess the corrosion resistance and corrosion mechanism of the wires. It was found that the transformation temperature range of A-wire (imported) is narrower while the A(s) and A(f) are close to the body temperature, which is more suitable in the orthodontic operation at early stage. The corrosion current density of A-wire is lower than that of B-wire (domestically made) while the corrosion potential is higher. EIS test results indicated that the corrosion mechanism was the same. However, the oxide layer formed on the surface of A-wire is more protective.
部门归属	[wang, qiang; zhang, yang; hao, fengyu] china med univ, sch stomatol, shenyang 110002, peoples r china. [wang, qiang; yang, ke; tan, lili] chinese acad sci, inst met res, shenyang 110016, peoples r china.;wang, qa (reprint author), china med univ, sch stomatol, shenyang 110002, peoples r china;mfqwang@yahoo.com.cn
关键词	Niti Orthodontic Wire Shape Memory Effect Phase Transformation Dsc Polarization Eis Shape-memory Alloys Transformation Characteristics Phase-transformation Corrosion Behavior
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WOS记录号	WOS:000288220700010
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31507
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Q. A. Wang,Y. Zhang,F. Y. Hao,et al. COMPARATIVE STUDY OF CLINICALLY USED NiTi ORTHODONTIC WIRES[J]. International Journal of Modern Physics B,2010,24(30):5929-5937.
APA	Q. A. Wang,Y. Zhang,F. Y. Hao,K. Yang,&L. L. Tan.(2010).COMPARATIVE STUDY OF CLINICALLY USED NiTi ORTHODONTIC WIRES.International Journal of Modern Physics B,24(30),5929-5937.
MLA	Q. A. Wang,et al."COMPARATIVE STUDY OF CLINICALLY USED NiTi ORTHODONTIC WIRES".International Journal of Modern Physics B 24.30(2010):5929-5937.