Translucency and color stability of bleached veneer shades with different resin cement

Aim This in-vitro study aimed to evaluate the translucency and color stability of bleached veneer shades with different resin cement. Material and Methods Forty-two IPS E-max CAD discs with bleached shades BL1 and BL3 milled by CAD/CAM, each disc was 0.5 mm in thickness, 10 mm in diameter. Each sample had been formed by cementation of IPS E-max CAD discover a PMMA disc 1 mm in thickness 10 mm in diameter with shade A2 by two different shades of resin cement from Variolink NLC shades clear and +2. This cementation done by using standardized mold 1.6 mm in thickness, with cement layer 0.1 mm. Translucency and color of each sample had been measured by Spectrophotometer. Transparent parameter and color difference △E had been calculated and analyzed by one-way analysis of variance then multiple comparison Tukey's test (α = 0.05). Results Using clear shade cement under both shade of IPS E-max showed lower than △E with cement shade +2. P value was highly significant in all samples (ρ> 0.000), while in BL3 disc before cementation and after cementation with clear cement showed nonsignificant result (ρ> 0.227). Transparent parameter was higher before cementation and the lowest value obtained with shade + 2 cement which is opaquer (10.59) with BL3 and (11.69) with BL1. Conclusion The final color and translucency of bleached veneers is influenced by the shade of resin cement.