Abstract
Objective: To evaluate if alcoholic beverages can cause color change in composite resins, if the alcoholic concentration influences this variation besides analyzing within the composite resins tested, which would present greater color stability when subjected to the experiment. Material and Methods: 90 specimens of three different composite resins (IPS Empress Direct, Grandio®So and Filtek Z350 XT) were immersed in distilled water (control group), red wine and vodka. The samples were 2 mm thick and 8 mm in diameter, photopolymerized for 20 s on each side, polished with sandpaper, silicon carbide tip and felt disc with prophylactic paste and immersed in distilled water at 37 °C for 24 h prior to subgrouping. For the evaluation of the color variation, the formula prioritized by the CIEL *a *b* system was used. Data were analyzed by ANOVA and Tukey’s test at 95% significance. Results: The lowest variations occurred with the Grandio®So resin when exposed to wine, and Filtek Z350 XT when exposed to vodka. There was a statistically significant difference between the groups in water (p < 0.01) and in red wine (p < 0.01), but not in vodka (p > 0.05). The soaking medium that most caused staining was red wine. Conclusion: Red wine was the drink that generated the highest staining in all the resins tested, vodka did not change color stability significantly, the alcoholic concentrations tested did not directly influence the color change and the composite resin Grandio®So presented greater color stability when exposed to red wine. KeywordsAlcoholic beverage; Color; Composite resin. KEY WORDS: Alcoholic beverage, color, composite resin.
Highlights
T oday, the aesthetic ideal prevails in every society, generating an increasingly expressive search for procedures that aim to reestablish aesthetics and smile
This study proposes the null hypothesis that the composite resins have the same color stability in face of the beverages tested
Color evaluations were performed after 24 h of immersion in distilled water at room temperature
Summary
T oday, the aesthetic ideal prevails in every society, generating an increasingly expressive search for procedures that aim to reestablish aesthetics and smile. Among the main factors of composite resin staining is the degradation of the organic matrix (by poor polymerization), surface irregularity and sorption of water, which allows the penetration of low molecular weight dyes [3]. Due to this latter property, several studies show that there is color change when there is contact between drinks and resins, because the resins are able to absorb other fluids besides water [4]. The external sources of contamination such as food habits, hygiene and chemical properties of the compound are related to extrinsic [5,6]. Keen to the tendency to discoloration and susceptibility to dyes, resins with a low degree of conversion, quality of the polishing, the composition and volume of the organic matrix and the charge particles [5,6]
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