Influence of NaHCO3 powder on color and roughness of the composite submitted to bleaching and Euterpe oleracea.

Aim: This study aims to evaluate the surface roughness and susceptibility staining of bleached composite resin with 22% carbamide peroxide, as well effect subsequent prophylaxis NaHCO3 powder. Material Methods: Forty disk-shaped (2 × 6 mm) specimens (Z250 XT) were prepared. Half subjected bleaching other half stored in artificial saliva. In sequence, all immersed acai juice (Euterpe oleracea) for 4 h 14 days, subdivided into two groups. Group 1 samples treatment, while group 2 treatment Surface (Ra) color (ΔE*) measured after polishing (T0), (T1), immersion (T2), application powder (T3) using a profilometer spectrophotometer. Results: Statistical analyses (analysis variance Tukey's test, p≤0.05) revealed that regarding there was statistically significance factors isolation, except factor bleaching. For both significant difference interaction, interaction between power Conclusion: The air-powder decreases resin; however, it increases roughness. With respect variable, whitening had no on tested material;