Uso do peróxido de hidrogênio a 35% no clareamento dental em diferentes tempos clínicos.

Abstract

The smile is a key part in the composition of a good appearance and color of the teeth is one of the characteristics that defines a smile as attractive. In this tooth whitening scenario appears as one of the options offered by dentistry to achieve this end, but this therapy is almost always accompanied by a nuisance; dentine sensitivity. Thus, the purpose of this study was to analyze the hydrogen peroxide to 35% used in different clinical time evaluating, and effectiveness of color, sensitivity behavior (how long lasts and what times is exacerbated). They selected 25 volunteers of both genders, aged between 18 and 30 years. For this study, the upper arch of each underwent an imaginary division from the midline to form the right group (GD) composed of the hemi-arch top right (tooth 11-15) and the left group (EG) composed of hemi-arch top left (tooth 21-25). The lower arch formed the control group (CG). The GD received 35% hydrogen peroxide - Whiteness HP® - FGM Dental Products, Joinville, Brazil in three sessions of 45 minutes each (1) Material and GE received the hydrogen peroxide to 35% - Pola Office® - SDI Limited Bayswater, VIC, Australia in three sessions of 24 minutes each (Material 2) with oneweek interval between sessions. The color was visually evaluated Vitapan Classical scale (Vita Zahnfabrick, bad säckingen, BW, Germany) to start and end each session and 12 days after the last treatment session. At the end of each session and after 12, 24 and 48 hours the volunteers recorded the occurrence of sensitivity in the range of faces of Wong-Backer pain rating. The results showed no statistically significant difference (P <0.05) compared to bleaching potential of the two products. Regarding the intensity of sensitivity when compared both used time there was also no statistically significant difference (P <0.05), except the second and third session where the material 2 showed lower sensitivity compared to material 1. The duration of the sensitivity this was gradually diminished over time after each session not exceeding 48 hours. It was concluded that there was no difference between the products in relation to the power of lightening and the hydrogen peroxide used in less time generated less sensitivity.