%0 Journal Article
%T Influence of a Bleaching Agent on the Color Stability of Indirect Composite Resins Immersed in Dyes
%J Ceramics | An Open Access Journal from MDPI
%D 2019
%R https://doi.org/10.3390/ceramics2020019
%X This study aimed to evaluate the effect of a bleaching agent on the color of extrinsically pigmented indirect composite resins. Samples of five resins (Adoro, Resilab, Cristobal, Sinfony, Epricord) were manufactured and divided into five groups: red wine, coffee, orange juice, Coca-Cola, and artificial saliva (control). The stained samples were immersed in a 38% hydrogen peroxide solution for 30 min per week, over three weeks. Color readings were performed at the initial state (L0), after 21 days of dye immersion (¦¤E1, L1), and after 7 (¦¤E2, L2), 14 (¦¤E3, L3), and 21 days (¦¤E4, L4) of bleach immersion. Data were subjected to ANOVA and Tukey¡¯s honestly significant difference (HSD) test (¦Á = 0.05). The color alteration was greater in ¦¤E1, regardless of color solution, indicating extrinsic pigmentation. The Resilab group exhibited greater ¦¤E1 values than the other resins. The bleaching agent promoted bleaching action on the surfaces of the materials studied, removing the previously impregnated pigments. View Full-Tex
%U https://www.mdpi.com/2571-6131/2/2/19