上海口腔医学

上海口腔医学 ›› 2016, Vol. 25 ›› Issue (2): 150-156.

• 论著 • 上一篇    下一篇

氟对变形链球菌黏附前后纯钛表面腐蚀性能的影响

耿黎1*，乔广艳2， 顾凯凯2   

  1. 1.上海中医药大学附属普陀医院　口腔科, 上海 200062；
    2.同济大学口腔医学院 修复科,上海 200072
  • 收稿日期:2015-12-15 修回日期:2016-02-23 出版日期:2016-03-25 发布日期:2016-05-06
  • 作者简介:耿黎(1977-),女,硕士,主治医师,E-mail:gl2027@163.com 乔广艳,Tel:021-66313715,E-mail: g_y_qiao@126.com
  • 基金资助:
    上海市卫计委青年课题(20114Y053)

The effect of fluoride on electrochemical corrosion of the dental pure titanium before and after adhesion of Streptococcus mutans

GENG Li1, QIAO Guang-yan2, GU Kai-kai2   

  1. 1. Department of Stomatology, Putuo Hospital Affiliated to Shanghai University of Traditional Chinese Medicine. Shanghai 200062;
    2. Department of Prosthodontics, School of Stomatology, Tongji University. Shanghai 200072, China
  • Received:2015-12-15 Revised:2016-02-23 Online:2016-03-25 Published:2016-05-06

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摘要： 目的: 比较氟化钠对变形链球菌黏附前、后纯钛电化学腐蚀性能的影响。方法: 应用电化学工作站的电化学阻抗谱法和动电位极化曲线法,对变形链球菌黏附前、后纯钛在0 g/L和1.0 g/L氟化钠人工唾液中的腐蚀行为进行比较。采用SPSS12.2软件包对数据进行统计学分析。结果:变形链球菌黏附前、后,纯钛在0g/L 和1.0 g/L 氟化钠人工唾液中的等效电路极化电阻Rct、腐蚀电位Ecorr、点蚀击穿电位Eb以及代表合金表面的“伪钝化”的△E(Ecorr与Eb之差)均存在显著差异(P<0.05)。结论:变形链球菌黏附后,纯钛的耐腐蚀性能降低,氟化钠也使纯钛的耐腐蚀性能降低。

关键词: 氟化钠, 牙科纯钛, 耐腐蚀性能, 变形链球菌, 黏附, 氟

Abstract: PURPOSE: To investigate the effect of fluoride on electrochemical corrosion of the dental pure titanium before and after adhesion of Streptococcus mutans. METHODS: The dental pure titanium specimens were tested by electrochemical measurement system including electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization curve (PD) methods in artificial saliva with 0 g/L and 1.0 g/L sodium fluoride before and after dipped into culture medium with Streptococcus mutans for 24 h. The corrosion parameters, including the polarization resistance (Rct), corrosion potential (Ecorr), pitting breakdown potential (Eb), and the difference between Ecorr and Eb representing the “pseudo-passivation” (△E) obtained from the electrochemical tests were used to evaluate the corrosion resistance of dental pure titanium. The data were statistically analyzed by 2×2 factorial statistical analysis to examine the effect of sodium fluoride and adhesion of Streptococcus mutans using SPSS 12.0 software package. RESULTS: The results showed that the corrosion parameters including Rct, Ecorr, Eb, and △E of pure titanium had significant difference between before and after adhesion of Streptococcus mutans in the same solution(P<0.05), and in artificial saliva with 0 g/L and 1.0 g/L sodium fluoride(P<0.05). CONCLUSIONS: The dental pure titanium was prone to corrosion in artificial saliva with sodium fluoride. The corrosion resistance of pure titanium decreased distinctly after immersed in culture medium with Streptococcus mutans.

Key words: Fluoride ions, Dental pure titanium, Corrosion resistance, Streptococcus mutans, Adhesion, Fluorine

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