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Aim: This study aimed to measure the effect of color stability of tested adhesive resin cements on the final color of cemented ceramic veneers, as well as the effect of different thicknesses of ceramic veneers on their final colors. Materials and Methods: A total of twenty-four disc-shaped resin cement specimens were prepared {12 disks/type of cement; the light-cured NX3 (LC) and the dual-cured NX3 (DC)}. The samples were immersed in water and coffee solutions for 7, 14 days. Forty-eight rectangular-shaped laminate veneers samples were cut from IPS e.max CAD ceramic blocks (24 samples of 0.4mm thickness and 24 samples of 0.6mm thickness; where 12 samples of each thickness were cemented by light cured resin cement (NX3), and the other 12 samples were cemented by dual cured resin cement (NX3); 6 out of 12 samples were either immersed in coffee solution or immersed in water. The samples were cemented on a Delrin background material. All the samples were examined by a spectrophotometer (VITA Easy shade) before and after immersion in the solutions. Results: The ΔE values of dual-cured resin cement disks were higher than those of light cured types. Also, differences were found in ΔE of the final shade of ceramic veneer when cemented by light cured and dual cured resin cements. Furthermore, there were differences in ΔE of the final shade when using different ceramic laminate veneers thicknesses. Conclusions: The ΔE of the final shade of ceramic veneer was affected by the type of the resin cement used as well as the thickness of ceramic laminate veneer.

Color Stability of Two Types of Dental Resin Cements and its Effect on the Color Change of the Ceramic Laminate Veneer with Two Different Thicknesses