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.

Color stability of dual‐cured and light‐cured resin cements: A systematic review and meta‐analysis of in vitro studies

“…Three of them were not included in the meta‐analysis because the mean and SD could not be extracted, 31–33 and one was excluded because data came from a clinical trial 11 . Finally, 23 articles remained for the quantitative analysis; all of them were in vitro studies 9,34–55 . Figure 1 shows a flowchart outlining the procedure for choosing studies in accordance with the PRISMA statement.…”

Assessment of physical/mechanical properties and cytotoxicity of dual-cured resin cements containing Sr-bioactive glass nanoparticles and calcium phosphate

“…Marginal discoloration of indirect restorations caused by poor color stability of resin cement has been detected in 30% to 40% of restorations 55) . It was also proposed that the yellowish appearance of resin cements could be due to the degradation of residual amines and the oxidation of the remaining double bonds in the cements 55,56) . The color difference (∆E00) perceptibility and acceptability levels of tooth-colored materials are 0.8 and 1.8, respectively.…”