摘要
目的:研究不同表面处理方式对纯钛耐腐蚀性的影响。方法:制作纯钛试件36件,分别进行机械抛光和电解抛光后,浸泡于不同氟浓度(0%、0.05%、0.2%)人工唾液中,(37.0±1.0)℃浸泡4周,测量浸泡前后表面粗糙度并观察表面形貌。结果:浸泡前后电解抛光组表面粗糙度均小于机械抛光组,差异有统计学意义(P<0.01);浸泡后纯钛表面粗糙度随氟浓度升高而增加。无氟存在时浸泡前后两组差异无统计学意义(P>0.05),加入氟后均与前组差异有统计学意义(P<0.01),电解抛光组与机械抛光组组间比较差异均有统计学意义(P<0.01)。显微镜下观察其表面形貌与粗糙度值结果一致。结论:电解抛光方式的耐腐蚀性优于机械抛光;氟离子对纯钛具有腐蚀性;高氟制品对纯钛的耐腐蚀性影响较大,选用纯钛修复体的患者,建议电解抛光后戴入口内。
Objective： To investigate the influence of different surface treatments on corrosion resistance of pure titanium. Methods： 36 specimen of pure titanium were prepared and randomly divided into two groups that were treated with mechanical polishing and electrolytic polishing respectively, and then soaked in different concentration fluoride（0%,0.05%, 0.2%） in artificial saliva,（37±1）℃ for 4 weeks. Surface roughness of the specimens were measured before and after immersion. The surface microstructures were observed by scanning electron microscope（SEM）. Results： Surface roughness of the electrolytic polishing group was significantly lower than that of the mechanical polishing group before and after immersion（P 〈0.01）; the surface roughness of pure titanium increased with concentration of fluoride. No significant difference were found between the two groups before and after immersion of fluorine free solution（P 〉0.05）. When soaked in artificial saliva with fluoride, there was a significant difference between the two groups before and after immersion（P 〈0.01）. There was significant difference between group electrolytic polishing and group mechanical polishing（P 〉0.01）. The surface microstructure observed by scanning electron microscope was consistent with the surface roughness. Conclusion： Electrolytic polishing is better than mechanical polishing for the corrosion resistance of pure titanium. Fluoride has an impact on the corrosion resistance of pure titanium. High concentration fluoride products has greater influence on corrosion resistance of pure titanium. Electrolytic polishing is better for patients with pure titanium prosthesis before wearing.
出处
《口腔颌面修复学杂志》
2014年第5期314-317,共4页
Chinese Journal of Prosthodontics
关键词
氟
表面处理
耐腐蚀性
纯钛
fluorine
surface treatment
corrosion resistance
pure titanium
