Effect of coffee staining and simulated oral hygiene methods on the color and translucency of a nanoceramic resin

Objective Evaluate the color and translucency of a nanoceramic resin subjected to hygiene practices and immersion in coffee over time. Materials and Methods Specimens (n = 80, HT and LT, 0.5‐mm thick) of a nanoceramic resin were obtained and were divided in groups according to the simulated oral hygiene: no intervention (NT), brushing with an electric brush and water (BN), brushing with an electric brush and toothpaste for 10 s (BT), and immersion in mouthwash for 30 s (MW). Oral hygiene practices were repeated after staining in coffee solution for 15, 48, 336, 1440, 8640, and 35,040 min. Spectral wavelengths were recorded with a spectrophotometer at each time. ∆E00, ∆L′, ∆C′, ∆H′, and TP00 were calculated by CIEDE2000 and were evaluated by 2‐way ANOVA, repeated measures ANOVA, and Tukey's HSD test (α = 0.05). Results ANOVA showed significance among factors for ΔE00 (p