Influência de agentes clareadores na rugosidade superficial do esmalte

NAHSAN, Flavia Pardo Salata; SCHMITT, Vera Lúcia; NAUFEL, Fabiana Scarparo; FAVARÃO, Jamille; WALKER, Carolina Schmitt; MONDELLI, Rafael Francisco Lia
October 2012
Revista Dental Press de Estética;out-dez2012, Vol. 9 Issue 4, p80
Academic Journal
The aim of this in vitro study was to evaluate whether the pH of bleaching agents affects the enamel surface after bleaching. Samples were prepared in enamel (3mm × 5mm × 3mm) from third molars, which were kept in artificial saliva. Were randomly divided into four groups (n = 10) and had half his face isolated. The bleaching treatment was performed for three weeks with daily application of 10% carbamide peroxide (Whiteness Perfect ® FGM) for 4h (G1), 16% carbamide peroxide (Whiteness Perfect® FGM) for 2 hours (G2), hydrogen peroxide 6% (Class® White FGM) for 1 hour and 30 minutes (G3) weekly injections of hydrogen peroxide 35% (Whiteness HP® FGM) with two applications of 15 minutes per session (G4). After this, rugosimetric analysis was made in both sides of the surface specimen. The results were analyzed using the paired t test and revealed a significant increase of enamel surface roughness bleached with groups of 16% carbamide peroxide, hydrogen peroxide 6% and 35%. We conclude that the use of carbamide peroxide 10% is a safe method that gives lower values of surface roughness if used in short periods. Additionally, the enamel alteration is dependent on the concentration of active ingredients of bleaching.


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