RESUMEN
O objetivo deste trabalho foi revisar as reações adversas do clareamento de dentes vitais, já que o mesmo tem sido bastante popularizado e realizado atualmente. As técnicas para o clareamento de dentes vitais utilizam como o principal agente clareador o peróxido de hidrogênio. Vantagens como preservação da estrutura dentária, menor custo e resultados estéticos satisfatórios, têm sido relatadas, no entanto, podem ocorrer reações adversas, como irritação dos tecidos moles, hipersensibilidade dentária, alterações na textura de superfície do esmalte e dos materiais restauradores, além de alterações no tecido pulpar. Estudos demonstram que estes efeitos adversos existentes são mínimos e reversíveis, sendo o clareamento de dentes vitais uma técnica eficaz e segura.
The aim of this study was to review the side effects of vital teeth bleaching, since it has been widely popularized and performed today. The techniques of vital teeth bleaching use the hydrogen peroxide as the main bleaching agent. Advantages such as preservation of tooth structure, lower cost and satisfactory cosmetic results have been reported, however, side effects may occur, such as irritation of the soft tissues, dental hypersensitivity, changes in the texture of the enamel and restorative materials surfaces, and changes the pulp tissue. Studies show that these side effects are minimal and reversible, being the vital teeth bleaching effective and safe. This review was performed using Scielo, Bireme and Lilacs data base as a source of research, the mostly of scientific articles was published between the years 2000 to 2012.
RESUMEN
OBJECTIVE: To determine whether photos or silhouettes are adequate methods for evaluating the esthetic profiles of black subjects and whether black and white evaluators have different preferences for esthetic profiles. MATERIALS AND METHODS: One photographic record of the profile of a black female patient with accentuated dental bimaxillary dentoalveolar protrusion was randomly selected. The image of the patient's profile was altered to produce a series of seven photos and seven silhouettes (a total of 14 images) with different lip positions but uniform distances in relation to the esthetic plane created by Ricketts (line E). Fifty black and 50 white lay evaluators were invited to enumerate the photos and silhouettes, produced according to the lip position, in the order in which they considered most esthetically pleasing. RESULTS: The number of preferences found to be within the esthetic norm was slightly higher among the photographs than among the silhouettes; the esthetic profile with a deviation of -2 mm from line E was elected as the most attractive, and the esthetic pattern with a deviation of +6 mm from the normal line E was considered the least attractive. There were no statistically significant differences between the preferences related to the variables race, sex, and educational background. CONCLUSIONS: The esthetic attractiveness of the facial profiles of black subjects in photos and silhouettes was evaluated in a similar manner among black and white evaluators. Among both black and white evaluators, the greatest preference was for the slightly concave profile, which was within the limit considered standard.