Análise espectrofotométrica da diferença de cor em dentes humanos vitais clareados

Abstract

The purpose of this research was to evaluate the difference of color in vital human teeth bleaching with two different brands of bleaching gels, with and without application of auxiliary light LED, to evaluate the dental sensibility in relation to different technique of bleaching and to evaluate the degree of personal satisfaction from patients, in regard to the type of suggested treatment. Were treated 52 patients, distributed in 4 groups entitled: G1 that received the treatment bleaching with hydrogen of peroxide 35% (Mix One®, Villevie, Joinvile, SC, Brazil); G2 hydrogen of peroxide 35 % (Whiteness HP®, FGM, Joinvile, SC, Brazil); G3 hydrogen of peroxide 35% (Mix One®, Villevie, Joinvile, SC, Brazil) and photoactivated with LED Bright Max® (MM Optics, São Carlos, SP, Brazil) and G4 hydrogen of peroxide 35 % (Whiteness HP®, FGM, Joinvile, SC, Brazil) photoactivated with LED Bright Max® (MM Optics, São Carlos, SP, Brazil). To accomplish the readings of the color a spectrophotometer was used (Shade Eye NCC®, (SHOFU, Kyoto, Japan). For dental sensibility and personal satisfaction a questionary was applied questions to the patients. The average values of ΔE attained by the reading through the spectrophotometer were subjected to variant analysis (ANOVA), where the group G1 displayed P<0,01 with bigger values of ΔE obtained for teeth where was used the product Mix One, when the products underwent photoactivation, the results of the statistics analysis unveiled no difference among the same P>0,05. For the dental sensibility the test Kruskal- Wallis was applied, with the complementary test of Dunn, which disclosed significant differences among the obtained scores (P=0,0446). For the satisfaction intensity, a descriptive analysis was realized, where the percentage between the groups did not show significant differences. It follows that there was a difference in relation to change of dental color among the researched groups, where it was noticed a better bleaching for the group G1, there was difference in dental sensibility between the groups G2 and G3 only in the 1st application, with better results for the group G3 and after 1 year there was no difference between the groups in regards to personal satisfaction.