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Effect of coffee staining and simulated oral hygiene methods on the color and translucency of a nanoceramic resin. | LitMetric
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. ∆E, ∆L', ∆C', ∆H', and TP 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 ΔE (p < 0.05), with higher ΔE for NT-HT (11.7) and NT-LT (11.2). After T6 (2-year simulation), the lowest values were found for BT-HT (5.3) and BT-LT (4.9). All groups showed a reduction in lightness and translucency and increased chroma and hue. However, the smallest variations were found in the BT groups (p < 0.05).Conclusions : Brushing with toothpaste effectively minimized the color change of NCRs caused by coffee staining.Clinical Significance : Oral hygiene practices, such as brushing with toothpaste, might be important to minimize staining of nanoceramic resin restorations, especially in patients who frequently consume coffee.
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