Avaliação da efetividade de diferentes produtos na redução da permeabilidade da dentina radicular e resistência a desafios ácidos

• Ano de defesa: 2014
• Autor(a) principal: Domingues, José Eduardo Gomes [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Ácidos; Dentina - Sensibilidade; Acids
• Link de acesso: http://hdl.handle.net/11449/145506; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/08-11-2016/000874746.pdf

The aim of the study was to evaluate in vitro the effectiveness of different desensitizing agents for the treatment of cervical dentinal hypersensitivity in the reduction of dentine permeability and resistance to challenges with different acids of diet. Material and Methods: Were used, 75 freshly extracted third molars. The crowns of these teeth were sectioned at the cementum-enamel junction, the pulp tissues were removed and the cervical root dentins were exposed using a cylindrical drill associated with a high speed device (1 mm of deepness). Only these parts of the teeth were exposed because the rest was covered with black enamel. These 75 specimens were randomly allocated in three groups of 25: I -Biosilicato®, II - Colgate Sensitive Pró-Alívio® e III - Desensibilize Nano P® . The specimens were fixed to a hydraulic pressure device for assessing the variation in the dentine permeability after treatments with the desensitizing agents and after acid challenges with different beverages. The dentine permeability was measured after the following sequential steps: (1) after the acid etching of the specimens; (2) after the application of the desensitizing agents; (3) After three sequential acid challenges with different commonly consumed substances (Lemon, vinegar, white wine, coke®, energetic). Kruskall-Wallis teste, Bonferroni multiple comparison and nonparametric ANOVA with repeated measures they were applied for the statistical analysis and the significance level was set to 0.05. Results: All the desensitizing agents were effective to reduce the dentine permeability (p <0.001). Additionally, the Biosilicate® group showed a lower residual dentine permeability (32.98±13.71%) compared with the groups of samples treated by the Colgate Sensitive Pro-Relief® (53.14% ± 13:30) and with the Desensitive Nano P® (55.82±17.35%) (p <0.001). It was showed that all the substances...(Complete abstract electronic access below)