Avaliação do biosilicato® e do flúor gel acidulado na permeabilidade da dentina radicular. Estudo in vitro

• Ano de defesa: 2014
• Autor(a) principal: Pinheiro, Michele Carolina [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Dentina - Sensibilidade; Camada de esfregaço; Flúor; Materiais biomédicos; Sensitivity of dentin
• Link de acesso: http://hdl.handle.net/11449/145507; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/23-09-2016/000871114.pdf

Biomaterials, such as bioactive glasses and glass ceramics have been proposed for the treatment of cervical dentinal hypersensitivity (HSDC) by forming a hydroxycarbonate apatite layer obliterating the dentinal tubules. The aim of the study was to evaluate in vitro the effectiveness of a new bioactive glass ceramic particulate called Biosilicate®, added to the acidulated fluoride gel and acidulated fluoride gel itself to reduce or eliminate dentinal permeability before and after dietary acid challenges. Two hundred and forty freshly extracted third molars had the crown sectioned above at the cemento enamel junction, the pulp tissue removed and the cervical root dentin exposed using a cylindrical high-speed bur (about 1 mm in depth substance loss). From each root fragment, one specimen was prepared, totaling 240 specimens randomized into 2 groups differed on the product used (Biosilicate® more fluoride gel or fluoride gel) and 10 subgroups, which differed as to the substance used for the challenges acids (lemon, orange, pineapple, cherry, grape, vinegar, white wine, coca cola, lemon-flavored Gatorade, orange juice industrialized).The specimens were attached to a hydraulic pressure apparatus to evaluate the alterations of root dentin permeability after treatment with Biosilicate® and Fluoride gel and after acid challenges. The dentin permeability was measured after the following sequential steps: (1) after etching of the specimens obtained a value of maximum permeability of each specimen, (2) after treatment with Biosilicate® and Fluorine or Fluorine, (3) after dietary acid challenges; this last stage being repeated 2 more times. All data were converted to percentage values being considered the first step to 100%.After statistical analysis using the Mann-Whitney, Kruskal-Wallis and Wilcoxon was determined that both products decreased statistically dentin permeability however (Complete abstract electronic access below).