Evaluation of Bonding Performance of a Novel Resin Cement System

Objectives: Laminate veneer restorations have been widely used clinically because they can improve the aesthetics of natural teeth more quickly and reliably than whitening treatment. However, the shades of laminate veneers, which are thin, tend to be influenced by the shades of abutments and cements, making it difficult to achieve the aesthetic matching with the shades of adjacent teeth. This study aimed to evaluate the bonding performance of a novel resin cement system that involves BeautiCem Veneer (BCV), which enables users to freely control the lightness of restorations while controlling the influence of abutment colors, used in combination with BeautiBond Xtreme (BBX), a one-component universal adhesive.
Methods: Porcelain specimen was bonded to bovine enamel/dentin using BCV, and its bond strength was evaluated. Bonding surfaces of tooth and porcelain specimens were polished with 600-grit SiC paper. Polished porcelain specimens were sandblasted, treated with BBX, and BCV was applied. Each porcelain specimen was then placed firmly to a tooth specimen. After removal of excess cement, specimens were light-cured. After storage in water (37°C, 24h, left undisturbed), or after 2,000 thermal cycles (between 4°C and 60°C; 30s immersion for each temperature setting) following the 24h storage in water, specimens were evaluated for shear bond strength using a universal testing machine (Instron Model 5543, Instron Co.), and statistically analyzed (ANOVA, Turkey’s, α=0.05). For comparison, Rely X Veneer (RXV, 3M ESPE) and VarioLink Esthetic LC (VEL, Ivoclar Vivadent) were used.
Results: BCV showed well-balanced bond strength to both enamel and dentin, and significantly higher durable bond strength to dentin than the other products (p<0.05).
Conclusions: The novel resin cement system that combines BCV and BBX exhibited good adhesion to tooth structure and porcelain specimens, suggesting its usefulness in laminate veneer restoration.