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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R_(ct)、腐蚀电位E_(corr)、点蚀击穿电位E_b以及代表合金表面的“伪钝化”的△E(E_(corr)与E_b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。
Objective: To compare the effects of sodium fluoride on the electrochemical corrosion of pure titanium before and after adhesion of Streptococcus mutans. Methods: The electrochemical behavior of electrochemistry workstation and potentiodynamic polarization curve were used to study the corrosion behavior of streptococcus mutans in 0 g / L and 1.0 g / L sodium fluoride artificial saliva before and after adhesion Compare SPSS12.2 software package for statistical analysis of the data. Results: Equivalent circuit polarization resistance R_ (ct), corrosion potential E corr, and pitting breakdown of pure titanium in 0g / L and 1.0g / L sodium fluoride artificial saliva before and after adhesion of Streptococcus mutans There was a significant difference (P <0.05) between the potential E_b and the △ E (difference between E corr and E_b) representing the “pseudo passivation” of the alloy surface. Conclusion: The adhesion of Streptococcus mutans decreased the corrosion resistance of pure titanium and the corrosion resistance of pure titanium decreased with sodium fluoride.