3. Results
ANOVA factorial test determined a significant interaction
between the studied factors (composite resin and polishing
procedures—P < 0.01). After 7 days of storage in coffee
solution, greater values of color changes for Amelogen were
observed, regardless of the polishing procedure (Figure 1)The higher color changes were observed when Amelogen
was not polished compared to the other treatments and
composite resins. Filtek Supreme XT showed low color
alteration, and the best results were found when it was
polished with Sof-Lex. Control groups (3 and 6) showed theFigure 1: Average and standard deviation values concerning Delta
E regarding composite resins (Filtek Supreme (FS) and Amelogen
(AM), polishing procedures and coffee storage time (baseline and
7-days storage)). Different small letters mean statistically significant
difference between resin composites (P > 0.05); different capital
letters mean statistically significant difference between polishing
procedures (P > 0.05).highest level of staining, although there was no statistical
difference when Filtek Supreme XT was polished with PoGo.