Color change of lithium disilicate ceramic veneer on different thicknesses with and without glazing

Abstract

The purpose of this study was to compare the translucency and color change of laminate ceramic veneers on different thicknesses before and after glazing. Square-shaped specimens that were 0.3 mm, 0.6 mm and 0.9 mm thick, respectively, were fabricated with the Styleveneers (n=30). The color coordinates (CIE L* a* b*) of the specimens were measured before and after glazing with a colorimeter. For a comparison between the `not glazed` and `glazed` groups and among the thicknesses, data were analyzed with a paired T-test, oneway ANOVA test and multiple regression analysis using SPSS 18.0 (p=0.05). The translucency parameter (TP) of the 0.3 mm- and 0.6 mm-thick specimens showed statistically significant differences before and after the glazing process. The one-way ANOVA of color difference (ΔE*) and change of color coordinate (ΔL*, Δa*, Δb*) were statistically different among samples of different thicknesses. The result of the multiple regression analysis showed that Δb*, ΔL* improve ΔE*. Within the limitations of this study, we conclude that the glazing step changes the translucency of 0.3 mm- and 0.6 mm-thick specimens and the color of lithium disilicate laminate ceramic veneers.