中国组织工程研究

中国组织工程研究 ›› 2011, Vol. 15 ›› Issue (42): 7855-7858.doi: 10.3969/j.issn.1673-8225.2011.42.016

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

模拟人体口腔环境中比较镍钛弓丝的腐蚀性能

王  强1,2，那  莹1，战德松1，冯翠娟1，张  扬1   

  1. 1中国医科大学口腔医学院，辽宁省沈阳市 110002
    2中国科学院金属研究所，辽宁省沈阳市  110016
  • 收稿日期:2011-01-10 修回日期:2011-03-09 出版日期:2011-10-15 发布日期:2011-10-15
  • 通讯作者: 张扬，教授，博士生导师，中国医科大学口腔医学院，辽宁省沈阳市110002 mfqwang@yahoo.com.cn
  • 作者简介:王强☆，男，1981年生，山东省泰安市人，汉族，中科院金属研究所在读博士，助理研究员，主要从事生物材料及器械的研究工作。 mfqwang@yahoo.com.cn
  • 基金资助:

    辽宁省自然科学基金(镍钛合金表面改性及其在口腔正畸学领域的应用基础研究，No.20082088；低弹性模量种植体对周围骨组织应力分布及骨结合强度影响的研究，No.20092093)。

Corrosion evaluation of NiTi orthodontic wires under simulated human oral environment

Wang Qiang1,2, Na Ying1, Zhan De-song1, Feng Cui-juan1, Zhang Yang1   

  1. 1School of Stomatology, China Medical University, Shenyang  110002, Liaoning Province, China
    2Institute of Metal Research, Chinese Academy of Sciences, Shenyang  110016, Liaoning Province, China
  • Received:2011-01-10 Revised:2011-03-09 Online:2011-10-15 Published:2011-10-15
  • Contact: Zhang Yang, Professor, Doctoral supervisor, School of Stomatology, China Medical University, Shenyang 110002, Liaoning Province, China mfqwang@yahoo.com.cn
  • About author:Wang Qiang☆, Studying for doctorate, Assistant researcher, School of Stomatology, China Medical University, Shenyang 110002, Liaoning Province, China; Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning Province, China
  • Supported by:

    the Natural Science Foundation of Liaoning Province, No. 20082088, 20092093*

PDF

402

被引次数

3

摘要：

背景：口腔材料在行使功能时，处于非常复杂的电解质环境，会发生各种形式的生物环境腐蚀，导致金属离子的析出。现代金属腐蚀理论认为金属及其合金的生物学效应取决于材料在应用时被释放或溶出到生物体内的元素特性和浓度。
目的：考察两种临床常用正畸镍钛弓丝的腐蚀性能。
方法：采用光学显微镜及元素成分分析测试镍钛合金弓丝的显微组织形态和组成，应用循环极化法在模拟人体口腔环境中对比两种镍钛弓丝的腐蚀性能，把两种弓丝浸泡在37 ℃的人工唾液中1个月后观察分析其表面形貌。
结果与结论：两种弓丝的显微组织和组成存在差异。A弓丝的腐蚀电位高于B弓丝，而A弓丝的腐蚀电流相对较小，A弓丝表面形成的氧化膜更加稳定，对基体的保护效果更好。A弓丝的耐腐蚀性能相对较高，弓丝的组织、组成差别及其加工工艺是影响合金弓丝抗腐蚀性能的重要因素。

关键词: 钛合金, 弓丝, 人工唾液, 腐蚀, 循环极化

Abstract:

BACKGROUND: Corrosion occurs during dental materials service in oral environment and leads to the release of metal ions. According to the theory of modern metal corrosion, biological effects of metals and alloys depend on the released elements type and content.  
OBJECTIVE: To compare the corrosion characteristics of two clinically used NiTi arch wires.
METHODS: The microstructure and composition of two wires were studied by optical microscope and EDS. Cyclic polarization and immersion test were carried out to comparatively evaluate the corrosion characteristics of the two orthodontic wires in artificial saliva at 37 ℃. 
RESULTS AND CONCLUSION: The microstructure and composition of the two wires are somewhat different. Cyclic polarization reveals that the corrosion potential of A wire is higher while corrosion current lower. Oxide film formed on the surface of A wire is more stable and protective. The corrosion resistance of A wire is better than that of B wire resulted from the difference of microstructure, composition and processing technique.

中图分类号: