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目的:在高仿真环境中,采用电化学阻抗法分析纯钛种植材料的腐蚀性能。方法 :以PBS液为对照组,细胞培养液为实验组,采用电化学分析仪测试钛在含血清蛋白体系中的电化学阻抗谱,利用EIS-Nyquist图、EIS-Bode图及等效电路的拟合分析,研究血清蛋白对钛的抗腐蚀性能的影响,采用SPSS11.0软件包对数据进行统计学分析。结果:纯钛材料在细胞培养液中的氧化膜阻抗值(24.8±3.9)×105Ω显著大于在PBS液中的阻抗值(6.7±0.8)×105Ω(P<0.05)。纯钛在PBS中低频区的相位角约为55°,而在细胞培养液中低频区的相位角约为75°。结论:机体环境中的血清蛋白能够影响钛金属在体液中的腐蚀性能。
OBJECTIVE: To analyze the corrosion behavior of pure titanium implant materials by electrochemical impedance spectroscopy in high simulation environment. Methods: The PBS solution was used as the control group, and the cell culture medium was used as the experimental group. The electrochemical impedance spectroscopy (EIS) of titanium in the serum-containing protein system was performed by electrochemical analyzer. The EIS-Nyquist plot, Fitting analysis to study the effect of serum protein on corrosion resistance of titanium, using SPSS11.0 software package for statistical analysis of the data. Results: The impedance of pure titanium in the cell culture medium was (24.8 ± 3.9) × 105Ω significantly higher than that in PBS solution (6.7 ± 0.8) × 105Ω (P <0.05). The phase angle of pure titanium in the low frequency region of PBS is about 55 ° and the phase angle in the low frequency region of the cell culture medium is about 75 °. CONCLUSIONS: Serum proteins in the body environment can affect the corrosive properties of titanium in body fluids.