Abstract
This in vitro study evaluated the effects of incorporating quercetin (QC) at varying concentrations (0.25%, 0.5%, and 1%) into a 35% hydrogen peroxide (H2O2) bleaching gel on esthetic outcomes, enamel hardness and roughness, and H2O2 transamelo-dentinal diffusion. Bovine enamel/dentin disks (n = 180; 12/per group for each analysis) were allocated into five groups: (1) negative control (N…