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Previous issue date: 2018-02-02 / The aim of this paper was to evaluate the influence of acid etching on the bond strength of the universal adhesive system in caries-affected-dentin. For this experimental study, 40 erupted permanent third molars were selected at the Dental Clinic of the PUC-Campinas with Free and Informed Consent Term signed by the patients. Removal of the occlusal third with double - sided diamond disc and flat dentin surfaces obtained by sanding was done. The lesion of the caries was developed by microbiological method with S. mutans strain ATCC25175. The teeth were divided into 4 groups (n = 10): AF-I: phosphoric acid conditioning and application of the Universal Single Bond adhesive system - immediate microtensile test; AF-DC: phosphoric acid conditioning and application of the Universal Single Bond adhesive system and microtensile test after cariogenic challenge; SAF-I: application of the Universal Single Bond adhesive system without acid etching and immediate microtensile test and SAF-DC: application of the Universal Single Bond adhesive system without acid etching and microtensile test after carig?nico challenge. A composite resin block was made in the affected dentin. Each tooth / adhesive / resin block was sectioned with diamond discs coupled to the Isomet cutting machine in parallel planes obtaining test pieces in the shape of sticks, with a cross-sectional area of 1 mm2. Microtensile test was performed. Only adhesive / mixed fractures were considered for bond strength calculation. The results were evaluated by the Kruskal-Wallis test (Student-Newman-Keuls) and Friedman. The higher bond strength occurred in the groups in which the phosphoric acid conditioning was done (p <0.05). There was no significant difference in union strength after cariogenic challenge (p> 0.05). The type of fracture was predominantly adhesive. It was concluded that phosphoric acid caused increased bond strength of the Universal Single Bond adhesive system in caries affected dentin and the cariogenic challenge did not interfere in the bond strength of the Universal Single Bond adhesive system in dentin affected by caries. / O objetivo deste trabalho foi avaliar a interfer?ncia do condicionamento ?cido na resist?ncia de uni?o do sistema adesivo universal na dentina afetada por c?rie. Para este estudo de car?ter experimental foram selecionados 40 terceiros molares permanentes erupcionados com Termo de Consentimento Livre e Esclarecido assinado pelos pacientes na Cl?nica Odontol?gica da PUC-Campinas. Foi feita a remo??o do ter?o oclusal com disco diamantado dupla face e superf?cies dentin?rias planas obtidas atrav?s de lixamento. A les?o de c?rie foi desenvolvida pelo m?todo microbiol?gico com cepa padr?o S. mutans ATCC25175. Os dentes foram divididos aleatoriamente em 4 grupos (n=10): AF-I: condicionamento com ?cido fosf?rico e aplica??o do sistema adesivo Single Bond Universal - teste imediato de microtra??o; AF-DC: condicionamento com ?cido fosf?rico e aplica??o do sistema adesivo Single Bond Universal e teste de microtra??o ap?s desafio cariog?nico; SAF-I: aplica??o do sistema adesivo Single Bond Universal sem condicionamento ?cido e teste imediato de microtra??o e SAF-DC: aplica??o do sistema adesivo Single Bond Universal sem condicionamento ?cido e teste de microtra??o ap?s desafio carig?nico. Um bloco de resina composta Charisma foi confeccionado na dentina afetada. Cada bloco dente/adesivo/resina foi seccionado com discos diamantados acoplados a m?quina de corte Isomet em planos paralelos obtendo corpos de prova em forma de palitos, com ?rea de sec??o transversal de 1 mm2. Para realiza??o do teste de microtra??o. Apenas fraturas adesivas /mistas foram consideradas para c?lculo de resist?ncia de uni?o. Os resultados foram avaliados pelo teste Kruskal-Wallis (Student-Newman-Keuls) e Friedman. A maior resist?ncia de uni?o ocorreu nos grupos em que foi feito o condicionamento com ?cido fosf?rico (p<0.05). N?o houve diferen?a significante na resist?ncia de uni?o ap?s o desafio cariog?nico (p>0.05). O tipo de fratura predominante foi adesiva. Pode-se concluir que o ?cido fosf?rico acarretou aumento na resist?ncia de uni?o do sistema adesivo Single Bond Universal na dentina afetada por c?rie e o desafio cariog?nico n?o interferiu na resist?ncia de uni?o do sistema adesivo Single Bond Universal na dentina afetada por c?rie.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede.bibliotecadigital.puc-campinas.edu.br:tede/1029 |
| Date | 02 February 2018 |
| Creators | Pavanello, Renata Eliza |
| Contributors | Pinheiro, S?rgio Luiz, Araujo, Giovana Spagnolo Albamonte de, Fontana, Carlos Eduardo |
| Publisher | Pontif?cia Universidade Cat?lica de Campinas, Programa de P?s-Gradua??o em Ci?ncias da Sa?de, PUC-Campinas, Brasil, CCV ? Centro de Ci?ncias da Vida |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da PUC_CAMPINAS, instname:Pontifícia Universidade Católica de Campinas, instacron:PUC_CAMP |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 6411916762624721206, 500, 500, -8538742193007695607 |
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