表面镀膜纯钛牙膏磨刷后表面粗糙度研究

A study of roughness on pure titanium coating with diamond like carbon

目的:研究纯钛铸件镀制含氢类金刚石膜H-DLC在体外刷洗实验中粗糙度、反射率、色彩的变化,为临床应用含氢类金刚石膜提供理论依据。方法:铸造纯钛试件20片,分别镀制H-DLC、TiN、阳极氧化以及空白对照,在牙刷磨耗机上刷洗75000次,对比刷洗前后的粗糙度增加值、反射率下降值、色彩变化值,并在扫描电镜下观察表面形貌。结果:4组试件中,H-DLC镀膜的粗糙度增加值、反射率下降值、色彩变化值最小(P<0.01),空白对照组的变化最大(P<0.01),阳极氧化组的色彩变化值较大与空白对照组接近(P>0.05),TiN的色彩变化值略小于H-DLC镀膜(P<0.05),各组试件在含氟与无氟牙膏处理因素之间比较,只有空白对照组的各项变化值有显著性差异(P<0.05)。扫描电镜观察空白对照与阳极氧化组试件表面刷痕明显,TiN和H-DLC镀膜表面未见明显刷痕,仅见有加工处理残留的细小痕迹。结论:与其他表面改性方法相比,刷洗实验对H-DLC镀膜的表面形态、光泽度、色彩影响最小。

Objective：To evaluate the roughness, reflectivity and color differences of several pure titanium surface modification after wearing experiment. Methods：20 casting pure titanium specimens were divided into 4 groups according to different surface modification as H-DLC, TiN, anodizing, untreated. Using toothbrushing machine to brush each specimen for 75 000 times. Compared the roughness, reflectivity and color differences before and after brushing. Observed the surface morphology by SEM. Results：The changes of roughness, reflectivity and color difference in HDLC were lower than those of other groups （ P 〈 0.01 ） ; The changes of roughness, reflectivity in untreated group were higher than those of others（ P 〈0.01 ）. Color differences of anodizing and untreated group showed no difference, and color difference of TiN group was lower than that of H-DLC（ P 〈 0.05 ）. SEM results showed clear traces on the surface of untreated and anodizing group after brushing. Conclusion：Compare to other surface modification methods, H-DLC coating has the best wearing behavior.