Objectives: Different shades of resin cements may adversely affect the final color of translucent restorations, especially laminates, which are thinner. The purpose of this study was to determine the effect of different types and shades of four different resin cements and IPS Empress Esthetic ceramics on the final color of laminate restorations.
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Methods: A total of 392 discs were made with A1, A3, EO, and ET shades of IPS Empress Esthetic with 0.5- and 1-mm thicknesses. Two dual-cure and two light-cure resin cement systems from different manufacturers (a total of 13 shades) were chosen for cementation. Similarly, with porcelain ingot shades A1 and A3, opaque and translucent shades were chosen from RelyX Veneer and Maxcem Elite cement systems. For the opaque and translucent shades of the Variolink II resin cement system, the highest and lowest (+3 and -3) and medium (0) shades of Variolink Veneer cement were included in the study. Color changes in the porcelain substructures after cementation were examined with a colorimeter, and color differences (DE) were calculated. The results were analyzed statistically (p = 0.05).
Results:
Results: The results indicated that the color of porcelain discs was significantly changed after cementation. Most of the color changes appeared after cementation with Variolink-3 Veneer. The greatest color changes were obtained from 0.5-mm-thick ET ceramics cemented with Variolink 3 Veneer (8.8 ΔE), whereas 1-mm EO ceramics cemented with Variolink II Tr (0.6 ΔE) exhibited lower color changes. The colors of the same shades of different resin cement systems were found at different coordinates in the CIE L*a*b* system. The color changes of ceramic veneers when cemented with resin cement decreased with the increase of ceramic thickness
Conclusions
Conclusions: Resin cement type and shades and ceramic shade and thickness influenced the resulting optical color of laminate restorations.