Glass transition and degree of conversion of a light-cured orthodontic composite

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorSostena, Michela M.D.S.-
Autor(es): dc.creatorNogueira, Renata A.-
Autor(es): dc.creatorGrandini, Carlos R.-
Autor(es): dc.creatorMoraes, João Carlos Silos-
Data de aceite: dc.date.accessioned2025-08-21T23:24:36Z-
Data de disponibilização: dc.date.available2025-08-21T23:24:36Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2009-01-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1590/S1678-77572009000600006-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/225703-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/225703-
Descrição: dc.descriptionObjective: This study evaluated the glass transition temperature (Tg) and degree of conversion (DC) of a light-cured (Fill Magic) versus a chemically cured (Concise) orthodontic composite. Material and Methods: Anelastic relaxation spectroscopy was used for the first time to determine the Tg of a dental composite, while the DC was evaluated by infrared spectroscopy. The light-cured composite specimens were irradiated with a commercial LED light-curing unit using different exposure times (40, 90 and 120 s). Results: Fill Magic presented lower Tg than Concise (35-84°C versus 135°C), but reached a higher DC. Conclusions: The results of this study suggest that Fill Magic has lower Tg than Concise due to its higher organic phase content, and that when this light-cured composite is used to bond orthodontic brackets, a minimum energy density of 7.8 J/cm2 is necessary to reach adequate conversion level and obtain satisfactory adhesion.-
Descrição: dc.descriptionDepartment of Physics and Chemistry São Paulo State University, Ilha Solteira, SP-
Descrição: dc.descriptionDepartment of Physics São Paulo State University, Bauru, SP-
Descrição: dc.descriptionDepartment of Physics and Chemistry São Paulo State University, Ilha Solteira, SP-
Descrição: dc.descriptionDepartment of Physics São Paulo State University, Bauru, SP-
Formato: dc.format570-573-
Idioma: dc.languageen-
Relação: dc.relationJournal of Applied Oral Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectDegree of conversion-
Palavras-chave: dc.subjectGlass transition temperature-
Palavras-chave: dc.subjectInfra-red spectroscopy-
Palavras-chave: dc.subjectMechanical spectroscopy-
Palavras-chave: dc.subjectOrthodontic composite-
Título: dc.titleGlass transition and degree of conversion of a light-cured orthodontic composite-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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