Effect of In-Office Bleaching Agents on Three Different Esthetic Restorative Materials: An In Vitro Study

Objective: The purpose of this study was to evaluate the effect two hydrogen peroxide concentrations, commonly used in In-Office bleaching, on surface roughness and color change different esthetic restorative materials. Materials Methods: Sixty disc samples (10 mm diameter 2 thickness) materials were constructed following manufacturers’ instructions. Samples classified into three main groups (n=20) according type material: Group1: Microhybrid composite Filtek P90 Silorane, Group 2: IPS emax Press 3: Vitadur Alpha porcelain. Each divided subgroups (n=10) (a b) bleaching agent (Opalesence Xtra Boost 35% (HP) Zoom 25% HP respectively). further equal divisions (n=5) test performed (Roughness testing Color assessment). sample assessed for before so that each served as its own control. Surface examined using Environmental scanning electronic microscope (ESEM). measurements made with spectrophotometer CIELAB scale. One from subgroup confirm their crystalline phase after X-Ray Diffraction. Results statistically analyzed. Results: Significant differences Ra values observed between unbleached bleached samples, well treated Opalesence those 2. agents had significant (P<0.05). Moreover, found be significantly higher compared 2, regarding mean ΔE values. Conclusion: Highly concentrated in-office systems adversely affected e-max