Shade Changes of Cemented CERASMART Laminate Veneers after Exposure to Commonly Consumed Beverages (An in Vitro Study)

Statement of the problem: Many types of ceramic laminate veneers are characterized by long term color instability. Soft drinks and beverages such as coffee and carbonated orange juice are the type of diet consumed by the larger populations; these beverages may affect the color stability of hybrid ceramic restorations.Purpose: The aim of this in vitro study was to evaluate the shade changes of bonded CERASMART laminate veneers after exposure to commonly consumed beverages (carbonated orange juice and coffee) compared to artificial saliva (control group) Materials and methods: a total of 36 freshly extracted anterior teeth were prepared with butt joint design to receive CERASMART laminate veneers.Laminate veneers were bonded using total etch protocol and RelyX veneer cement. All samples were subjected to thermo-cycling, then randomly divided according to the type of the immersion solutions into 3 groups, 12 samples in each group. Group1: (control group) artificial saliva, Group2: coffee, Group3: carbonated orange juice. The samples were immersed in solutions in an incubator at 37oC for 24 days. Color measurements were recorded using VITA Easyshade® Advance 4.0 device at two different intervals: before immersion of samples and after 24 days immersion of the samples. Color change calculated using the equation Δ E= [(ΔL*) 2+ (Δa*) 2+ (Δb*) 2] ^½. The data obtained were collected, tabulated and then subjected to statistical analysis. Results: A statistically significant difference was found between (Carbonated orange juice) solution on one hand and each of (Artificial saliva) and (Coffee) solutions groups on the other hand where (p=0.018) and (p=0.003) respectively. No statistically significant difference was found between (Artificial saliva) and (Coffee) solutions where (p=0.653). Coffee recorded statistically significant highest color change among all immersion solutions. All bonded CERASMART laminate veneers showed clinically unacceptable color difference Δ E more than 3.3. Conclusions: it was concluded that CERASMART restorations suffer from remarkable color instability and it should be avoided in patients with high consuming frequency of coffee and carbonated beverages.