调磨抛光后2种金属材料表面性能及细菌粘附的研究

发布时间：2018-04-12 23:10

本文选题：钴铬合金 + 纯钛　；参考：《佳木斯大学》2017年硕士论文

【摘要】：目的:研究口腔修复材料钴铬合金(Co-Cr)和纯钛(Ti)在临床调磨后使用不同抛光方法进行处理,探讨它们的表面性能及对变异链球菌粘附的影响,为临床修复体选择适合的抛光方法提供参考。方法:将钴铬合金(Co-Cr)和纯钛(Ti)制作成10mm×10mm×1.2mm规格试件,各30片,常规包埋铸造切削打磨抛光,相同条件下调磨后,随机分成五组,分别为A、B、C、D、E五组,A组为实验对照组,不处理,B、C、D、E组按照不同的抛光方法进行处理,扫描电子显微镜下观察抛光后试件表面形貌,粗糙度测试仪测各组粗糙度值,消毒灭菌后进行体外变异链球菌粘附实验并菌落计数,统计学分析。结果:相同材料,不同抛光方法组间粗糙度(Ra)和细菌粘附量有显著差异(P0.05);相同抛光方法,不同材料组间粗糙度(Ra)及细菌粘附量有显著差异(P0.05),钴铬组抛光后测得的粗糙值均小于纯钛组;扫描电镜下可见,两种金属表面可见铸造气孔,随着抛光程序的增加,划痕逐渐减少,表面越来越光滑;变异链球菌体外培养24h后试件表面细菌粘附量为:A、B、C组中钴铬合金细菌粘附量小于纯钛A、B、C组,但D、E组中钴铬合金细菌粘附量大于纯D、E组,差别均有统计学意义(P0.05)。结论:1.本实验研究结果显示细菌的粘附量与抛光的精细程度密切相关,提示临床修复体的打磨抛光应尽可能获得光滑表面,以便能在最大程度上减小其表面的菌斑积聚。2.使用毡轮+抛光膏与布轮+抛光液后,钴铬合金与纯钛试件表面光滑呈镜面状,可达到临床理想的抛光效果。
[Abstract]:Objective: to study the effects of different polishing methods on the surface properties of cobalt chromium alloy Co-Cr and pure titanium tibia after clinical grinding, and to investigate their surface properties and their effects on the adhesion of Streptococcus mutans.It provides a reference for clinical prosthesis to select suitable polishing methods.The surface morphology of polished samples was observed under scanning electron microscope, roughness values of each group were measured by roughness tester, adhesion test of Streptococcus mutans in vitro and colony count were carried out after disinfection and sterilization.Statistical analysis.Results: there were significant differences in roughness Raand bacterial adhesion between the same materials and different polishing methods (P 0.05) and the same polishing methods.There were significant differences in roughness Raand bacterial adhesion between different material groups (P 0.05), rough values measured in cobalt chromium group were lower than those in pure titanium group, casting pores were observed on the surface of the two metals under scanning electron microscope, and with the increase of polishing procedure,After 24 h culture of Streptococcus mutans in vitro, the bacterial adhesion of Cobalt chromium alloy in group C was lower than that in group C of pure titanium, but the adhesion amount of bacteria in group D was higher than that in group D (n = 6), but the adhesion capacity of bacteria in group C was higher than that in group C (P < 0.05), but the adhesion capacity of bacteria in group C was higher than that in group C (P < 0.05).The difference was statistically significant (P 0.05).Conclusion 1.The results showed that the amount of bacteria adhesion was closely related to the fine degree of polishing. It suggested that the smooth surface should be obtained as much as possible in order to minimize the accumulation of plaque. 2.After using felt wheel polishing paste and cloth wheel polishing liquid, the surface of cobalt chromium alloy and pure titanium specimen is smooth and mirror, which can achieve the ideal polishing effect in clinic.
【学位授予单位】：佳木斯大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：R783.1

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