INFLUÊNCIA DA PRESENÇA DO CÁLCIO EM AGENTES CLAREADORES E SUA RELAÇÃO COM A MICRODUREZA DO ESMALTE DENTAL HUMANO
| Autor: | Palmira Gomes Amaral, Danilo Barboza Lopes Magalhães, Rosenês Lima dos Santos, Estela Santos Gusmão, Germana Coeli de Farias Sales |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Molar
Remineralisation Saliva Materials science Hydrogen peroxide 35% Enamel paint business.industry chemistry.chemical_element Dentistry General Medicine Calcium Tooth enamel chemistry.chemical_compound medicine.anatomical_structure stomatognathic system chemistry visual_art visual_art.visual_art_medium medicine sense organs Hydrogen peroxide business Nuclear chemistry |
| Zdroj: | Revista Brasileira de Ciências da Saúde. 14:37-44 |
| ISSN: | 1415-2177 |
| DOI: | 10.4034/rbcs.2010.14.02.05 |
| Popis: | Objective: This study examined the microhardness of tooth enamel exposed to the bleaching agent hydrogen peroxide 35%, with or without calcium in its composition in order to ascertain whether the addition of this substance influences the change in microhardness. Material and methods: The samples were composed of ten intact human third molars, of which three fragments were obtained, so that each fragment from the same tooth was part of a different group. Group B consisted of ten samples, bleached with hydrogen peroxide 35% containing calcium. Group M consisted of ten samples, bleached with hydrogen peroxide at 35% without calcium, and group C (control) consisted of ten samples immersed in artificial saliva. The microhardness was evaluated before the treatment and after three sessions with an interval of seven days between them. Results: In Group B there was an increase of 5.47% in microhardness, considered significant, assigned to the presence of calcium in the bleaching agent. There was a reduction of 2.59% and 0.64% in groups M and C respectively, both considered nonsignificant. Conclusion: It was concluded that the presence of calcium in the whitening gel increases the microhardness of the bleached enamel, providing a remineralization of this substrate. |
| Databáze: | OpenAIRE |
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