Effect of Ultraviolet Aging on Translucency of Resin-Cemented Ceramic Veneers: An In Vitro Study

PurposeThe aim of this in vitro study was to evaluate the translucency of ceramic veneers cemented with light- or dual-cured resin cements after accelerated aging. Materials and MethodsA total of 392 specimens were made of shade A1 with 0.5- and 1.0-mm thickness. Light-cured RelyX Veneer and dual-cured Maxcem Elite and Variolink II resin cements were applied on the porcelain discs with a thickness of 0.1 mm. Translucency parameter (TP) values of the ceramic veneers after cementation and UV aging test were evaluated. Statistical analyses were done with ANOVA and Tukey's tests and paired sample t-test (p < 0.05). ResultsAll the resin cements affected the TP values of 0.5-mm-thick ceramic, while RelyX Veneer Tr (TP = 11.15; p = 0.608), Variolink II Tr (TP = 10.98; p = 0.55), and Maxcem Clear (TP = 11.81; p = 0.702) did not affect the translucency of 1-mm-thick ceramics (TP = 11.38). The aging process affected TP values of both ceramics and cemented ceramics, as the TP values decreased after aging. Among the TP values of opaque shade resin cements, there were significant differences between the ceramic, ceramic + RelyX Veneer WO, ceramic + Variolink II WO, and ceramic + Maxcem WO variables for both 0.5 and 1 mm thicknesses (p < 0.05). There were no significant differences between ceramic, ceramic + RelyX Veneer Tr, ceramic + Variolink II Tr, and ceramic + Maxcem Clear variables at 0.5 mm thickness, and there were no significant differences between ceramic, ceramic + RelyX Veneer Tr, and ceramic + Variolink II Tr variables after aging (p > 0.05). ConclusionsThe TP of the same color of resin cements varied related to the type or brand. Aging caused both the ceramics and cemented ceramics to become more opaque.