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Evaluation of resistance of bond eroded dentin: adhesion to substrate treated with fluoride and irradiateds with Nd:YAG laser

Grant number: 11/10827-4
Support Opportunities:Regular Research Grants
Duration: September 01, 2011 - August 31, 2012
Field of knowledge:Health Sciences - Dentistry - Dental Clinics
Principal Investigator:Clovis Pagani
Grantee:Clovis Pagani
Host Institution: Faculdade de Odontologia (FOSJC). Universidade Estadual Paulista (UNESP). Campus de São José dos Campos. São José dos Campos , SP, Brazil
Associated researchers:Isabela Silva Gomes ; Maria Beatriz Beber Kamozaki


This study aims to evaluate the resistance of dentin bond 60 3rd molars subjected to erosion by Sprite Zero (pH 2.6, 30 ml / sample, 25 ° C, Coca-Cola, Brazil) and treated with two different sources fluoride. We will also assess adherence performed with and without irradiation by Nd: YAG laser (Pulse Master 600 IQ - American Dental Technologies). We will use only the coronal portion of teeth, to be conducting such cuts in the transverse sectioning the root with a carborundum disk, and then in the mesio-distal crown, separating the buccal and lingual surface, crafting 120 specimens. All samples will be subjected to the erosive cycling by immersion in acid solution four times daily for 2 minutes for 5 days. Then it will be randomly divided into 3 groups: G1 - control, G2 - 1.23% NaF and G3 - 5% NaF. Bonding procedures will be done with the self etching adhesive Clearfil Sebond (Kuraray Medical Inc, Tokyo, Japan) and each group will be divided into two subgroups: SG1-Led and SG2 - Nd: YAG laser. All specimens will be restored with resin Z350 XT and submitted to cycling thermomechanical machine ER 37000 (training staff, technical equipment and scientific Ltda. São Paulo - SP, Brazil) with load of 50N and variation temperatures between 5 º C (± 2 ), 37 ° (± 2) and 55 º C (± 2), totaling 240.000 mechanical cycles and 10.000 thermal cycles. The bond will be tested by microtensile testing machine EMIC DL-200MF (Pinhais - PR, Brazil). The work will be submitted to the Ethics in Local Search, School of Dentistry of São José dos Campos - UNESP. The results will be statistically analyzed by ANOVA and Tukey test. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MARIA BEATRIZ BEBER KAMOZAKI; ANURADHA PRAKKI; LETÍCIA CARVALHO COUTINHO COSTA PEROTE; NATALIA CORTEZ GUTIERREZ; CLOVIS PAGANI. The effect of CPP-ACP and Nd:YAG laser on the bond strength of softened dentin. Brazilian Oral Research, v. 29, n. 1, p. 1-7, . (11/10827-4)

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