Evaluation of degree of conversion and hardness of dental composites photoactivated with different light guide tips

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorGalvão, Marília Regalado-
Autor(es): dc.creatorCaldas, Sergei Godeiro Fernandes Rabelo-
Autor(es): dc.creatorBagnato, Vanderlei Salvador-
Autor(es): dc.creatorRastelli, Alessandra Nara de Souza-
Autor(es): dc.creatorAndrade, Marcelo Ferrarezi de-
Data de aceite: dc.date.accessioned2021-03-10T19:52:41Z-
Data de disponibilização: dc.date.available2021-03-10T19:52:41Z-
Data de envio: dc.date.issued2014-05-27-
Data de envio: dc.date.issued2014-05-27-
Data de envio: dc.date.issued2013-03-26-
Fonte completa do material: dc.identifierhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC3571515/-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/74878-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/74878-
Descrição: dc.descriptionObjective: The aim of this study was to evaluate the degree of conversion and hardness of different composite resins, photo-activated for 40 s with two different light guide tips, fiber optic and polymer. Methods: Five specimens were made for each group evaluated. The percentage of unreacted carbon double bonds (% C=C) was determined from the ratio of absorbance intensities of aliphatic C=C (peak at 1637 cm-1) against internal standard before and after curing of the specimen: aromatic C-C (peak at 1610 cm-1. The Vickers hardness measurements were performed in a universal testing machine. A 50 gf load was used and the indenter with a dwell time of 30 seconds. The degree of conversion and hardness mean values were analyzed separately by ANOVA and Tukey's test, with a significance level set at 5%. Results: The mean values of degree of conversion for the polymer and fiber optic light guide tip were statistically different (P<.001). The hardness mean values were statistically different among the light guide tips (P<.001), but also there was difference between top and bottom surfaces (P<.001). Conclusions: The results showed that the resins photo-activated with the fiber optic light guide tip promoted higher values for degree of conversion and hardness.-
Formato: dc.format86-93-
Idioma: dc.languageen-
Relação: dc.relationEuropean Journal of Dentistry-
Relação: dc.relation0,749-
Relação: dc.relation0,749-
Direitos: dc.rightsopenAccess-
Palavras-chave: dc.subjectComposite resins-
Palavras-chave: dc.subjectHardness-
Palavras-chave: dc.subjectPolymerization-
Título: dc.titleEvaluation of degree of conversion and hardness of dental composites photoactivated with different light guide tips-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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