Influência do pH de géis clareadores e do tempo de aplicação em esmalte pré dessensibilizado na topografia e cor dental

• Autor(a) principal: Mendes, Gustavo Adolfo Martins
• Data de Publicação: 2016
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/7798
• topic: Clareamento dental; Peróxido de hidrogênio; Concentração de íons de hidrogênio; Tooth bleaching; Hydrogen peroxide; Hydrogen-ion concentration; ODONTOLOGIA::MATERIAIS ODONTOLOGICOS

Tooth bleaching is one of the procedures with the greatest increase in demand, and the number of products and publications in recent years. However, regardless of the technique to be used bleaching, bleaching agents can cause various changes in tooth structure. Some whitening agents have a pH drop over its response action, which can cause changes in the mineral content of the enamel. These changes may be higher when the time of contact between the bleaching agent and the tooth surface is increased. The aim of this study was to investigate the influence of time of application of whitening gel and its effects on tooth structure in pre-desensitized enamel samples with arginine bicarbonate. Eighty enamel blocks (5.5 x 5.5 mm) were obtained from 40 third molar teeth. These were randomly divided into 16 experimental groups (n = 5). Samples were pre-desensitized with arginine bicarbonate (Colgate Pro-Relief) and then bleached as experimental groups, varying the method of application of whitening gels (Opalescence Boost - Ultradent; Total Blanc - DFL) versus time. The pH range of the gel over the application time, the color variation obtained and roughness of the sample surface were evaluated. Results were subjected to statistical analysis with a significance level of 5%, showed similarity between the gels as the bleaching efficiency and roughness standards and longer application times tend to generate higher roughness values. It was concluded that shorter times of application of the whitening gel are more efficient since they cause less damage to enamel and are able to lighten equally and that the use of desensitizing toothpaste Arginine bicarbonate base prior to bleaching does not affect the whitening effect.