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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Influence of Concentration and Activation on Hydrogen Peroxide Diffusion through Dental Tissues In Vitro

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Autor(es):
Torres, Carlos R. G. [1] ; Souza, Cristiane S. [2] ; Borges, Alessandra B. [3] ; Huhtala, Maria Filomena R. L. [4] ; Caneppele, Taciana M. F. [5]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Estadual Paulista. UNESP
[2] Univ Estadual Paulista. UNESP
[3] Univ Estadual Paulista. UNESP
[4] Univ Estadual Paulista. UNESP
[5] Univ Estadual Paulista. UNESP
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: SCIENTIFIC WORLD JOURNAL; 2013.
Citações Web of Science: 9
Resumo

This study evaluated the effect of physical and chemical activation on the diffusion time of different concentrations of hydrogen peroxide (HP) bleaching agents through enamel and dentin. One hundred and twenty bovine cylindrical specimens were divided into six groups (n = 20): 20% HP; 20% HP with light activation; 20% HP with manganese gluconate; 35% HP; 35% HP with light activation; and 35% HP with manganese gluconate. The specimens were fixed over transparent epoxy wells with internal cavities to simulate a pulpal chamber. This chamber was filled with an enzymatic reagent to simulate pulpal fluid. The bleaching gels were applied on enamel surface and the image of the pulpal fluid was captured by a video camera to monitor the time of peroxide penetration in each specimen. ANOVA analysis showed that concentration and type of activation of bleaching gel significantly influenced the diffusion time of HP (P < 0.05). 35% HP showed the lowest diffusion times compared to the groups with 20% HP gel. The light activation of HP decreased significantly the diffusion time compared to chemical activation. The highest diffusion time was obtained with 20% HP chemically activated. The diffusion time of HP was dependent on activation and concentration of HP. The higher concentration of HP diffused through dental tissues more quickly. (AU)

Processo FAPESP: 10/18711-2 - Efeito da ativação física e química do gel clareador na velocidade de penetração do Peróxido de Hidrogênio - estudo in vitro
Beneficiário:Cristiane dos Santos Souza
Linha de fomento: Bolsas no Brasil - Iniciação Científica
Processo FAPESP: 12/10917-6 - Avaliação in vitro do efeito do clareamento dental sobre a fluorescência dos componentes orgânicos e inorgânicos do esmalte e dentina
Beneficiário:Taciana Marco Ferraz Caneppele
Linha de fomento: Auxílio à Pesquisa - Regular