上釉方式对钛-瓷修复体颜色及表面结构的影响

Effect of Glazing Techniques on Color of Porcelain-fused-to-titanium Restorations

目的 探讨不同的上釉方式对钛 -瓷修复体表面颜色的影响 ,并了解修复体表面结构的变化。方法 制作钛 -瓷修复体标准试件 ,分别用不同的上釉方法处理 ,采用 CIE1976 L AB色度系统在上釉前后对试件进行颜色测试 ,得到 L*、a*、b*值及 C* ab(饱和度 )和 hab(色调角 ) ,对所得结果进行统计分析 ,计算两组试件上釉前后的色差值。肉眼观察不同上釉处理的修复体表面结构。结果 用不同上釉方式处理的两组试件的色度值 ,上釉前后的差异均无显著性 (P>0 .0 5 ) ,色差值均小于 1.5 ;两组试件表面结构无差异。结论 不同的上釉方式对钛 -瓷修复体表面颜色的影响无显著差异 ,只要上釉前处理方法相同 。

Objective To study the effect of various glazing techniques on color of porcelain-fused-to-titanium restorations and their surface texture. Methods Standard samples of Dentsply Tibond porcelain fused-to-metal restorations were made. Selfglazing and over-glazing techniques were used. Color parameters were tested by cs-5 spectrophotometer with CIE1976LAB color system before and after glazing. Statistical analysis was done and the color differences were calculated. The samples′surface structure was observed under the same background. Results No statistical significance existed in all of the color parameters between two groups before and after glazing. The values of color difference were all smaller than 1.5. The samples had the same surface structure after treated by different glazing techniques. Conclusions Glazing techniques had no effect on final color of porcelain-fused-to-titanium restoration. No matter what kind of glazing techniques were used, the same surface structure and color would be obtained as long as the same polish way was used before glazing.