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

Abstract

Background: This study aimed to assess the color change of two amine‑free dual‑cure resin
cements following aging in comparison with a light‑cure resin cement.
Materials and Methods: This in vitro, experimental study evaluated 6 groups (n = 10), including
three 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 by
spectrophotometry. 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 that
of porcelain‑bonded cements. The ΔE of G‑CEM LinkForce cement group was significantly higher
than that of Panavia V5 group (P = 0.020), and the ΔE of the latter group was significantly higher
than that of Choice 2 cement group (P = 0.021).
Conclusion: Considering the color change of cements evaluated in this study, Choice 2 and Panavia
V5 cements bonded to porcelain showed acceptable color change, which indicates that they are
suitable for cementation of esthetic dental restorations.
 Ceramic laminates have become an ideal esthetic treatment for anterior
restorations. The resin cement discoloration can affect final appearance of these restorations.
Besides that, exposed resin cement line can lead to the esthetic problem over time.
Key Words: Aging, color, resin cement, spectrophotometry