Effect of aging on color stability of amine‑free resin cement throughthe ceramic laminate veneer

Background: This study aimed to assess the color change of two amine‑free dual‑cure resincements following aging in comparison with a light‑cure resin cement.Materials and Methods: This in vitro, experimental study evaluated 6 groups (n = 10), includingthree groups of cements bonded to feldspathic porcelain and three groups of resin cements alone.Panavia V5 (Kuraray) and G‑CEM LinkForce (GC) dual‑cure resin cements and Choice 2 (Bisco)light‑cure resin cements were bonded to porcelain according to the manufacturers’ instructions.The color parameters of the groups were measured before and after 5000 thermal cycles byspectrophotometry. Data were analyzed using two‑way ANOVA and Tukey’s post hoc test (α =0.05).Results: The color change (ΔE) of the cement groups alone was significantly greater than thatof porcelain‑bonded cements. The ΔE of G‑CEM LinkForce cement group was significantly higherthan that of Panavia V5 group (P = 0.020), and the ΔE of the latter group was significantly higherthan that of Choice 2 cement group (P = 0.021).Conclusion: Considering the color change of cements evaluated in this study, Choice 2 andPanavia V5 cements bonded to porcelain showed acceptable color change, which indicates thatthey are suitable for cementation of esthetic dental restorations. Ceramic laminates have becomean ideal esthetic treatment for anterior restorations. The resin cement discoloration can affectfinal appearance of these restorations. Besides that, exposed resin cement line can lead to theesthetic problem over time.