Effect of acidic drinks on shade matching, surface topography, and mechanical properties of conventional and bulk-fill composite resins

Oxygen Inhibition of Surface Composites and Its Correlation with Degree of Conversion and Color Stability

“…The color analysis was carried out immediately after specimen preparation. After 24 h of specimens being stored in a dry and dark container at 37 °C, they were individually immersed in 1 mL of coffee solution (Nestlé, São Paulo, SP, Brazil) for 15 days at 37°C (9). The solution was replaced daily.…”

“…Moreover, both bulk-fill and nanoparticle (enamel shade) have high translucency and hightranslucent materials had the lowest color stability (19) The aging process was simulated to examine changes in the color alteration of the composite resins over time (14,16,20). In vitro studies evaluating color stability have examined composite specimens immersed in staining solutions over a particular period of time (9,14,16). Some beverages can alter the color of composite resins through the absorption and/or adsorption of colorants during the period of exposure (9,21).…”

“…In vitro studies evaluating color stability have examined composite specimens immersed in staining solutions over a particular period of time (9,14,16). Some beverages can alter the color of composite resins through the absorption and/or adsorption of colorants during the period of exposure (9,21). In most studies, the specimens have been immersed in coffee, grape juice, wine, and other beverages continuously for long periods of time (hours or days) (3,9).…”

“…Some beverages can alter the color of composite resins through the absorption and/or adsorption of colorants during the period of exposure (9,21). In most studies, the specimens have been immersed in coffee, grape juice, wine, and other beverages continuously for long periods of time (hours or days) (3,9). However, the exposure of composite restorations to beverages in vivo occurs through several cycles of a few seconds each.…”

Color stability of a bulk-fill composite resin light-cured at different distances

“…8 Some drinks in the diet of the population have greater potential to change the color of composite resins, such as coffee, tea, juices and wine. 9,10 Coffee is a commonly consumed beverage and has strong potential to stain both dental structure and resin materials, because it has water-soluble dyes and polyphenols, such as tannin, caffeine and caffeic acid. Lower polarity causes the coffee pigments to have higher adsorption and dye penetration in the composite resin.…”