The effect of different light-curing units on tensile strength and microhardness of a composite resin

Detalhes bibliográficos
Autor(a) principal: Franco, Eduardo Batista
Data de Publicação: 2007
Outros Autores: Santos, Patrícia Aleixo dos, Mondelli, Rafael Francisco Lia
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of applied oral science (Online)
Texto Completo: https://www.revistas.usp.br/jaos/article/view/3514
Resumo: The aim of this study was to evaluate the influence of different light-curing units on the tensile bond strength and microhardness of a composite resin (Filtek Z250 - 3M/ESPE). Conventional halogen (Curing Light 2500 - 3M/ESPE; CL) and two blue light emitting diode curing units (Ultraled - Dabi/Atlante; UL; Ultrablue IS - DMC; UB3 and UB6) were selected for this study. Different light intensities (670, 130, 300, and 600 mW/cm², respectively) and different curing times (20s, 40s and 60s) were evaluated. Knoop microhardness test was performed in the area corresponding to the fractured region of the specimen. A total of 12 groups (n=10) were established and the specimens were prepared using a stainless steel mold composed by two similar parts that contained a cone-shaped hole with two diameters (8.0 mm and 5.0 mm) and thickness of 1.0 mm. Next, the specimens were loaded in tensile strength until fracture in a universal testing machine at a crosshead speed of 0.5 mm/min and a 50 kg load cell. For the microhardness test, the same matrix was used to fabricate the specimens (12 groups; n=5). Microhardness was determined on the surfaces that were not exposed to the light source, using a Shimadzu HMV-2 Microhardness Tester at a static load of 50 g for 30 seconds. Data were analyzed statistically by two-way ANOVA and Tukey's test (p
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spelling The effect of different light-curing units on tensile strength and microhardness of a composite resin PhotopolymerizationLEDMicrohardnessTensile strength The aim of this study was to evaluate the influence of different light-curing units on the tensile bond strength and microhardness of a composite resin (Filtek Z250 - 3M/ESPE). Conventional halogen (Curing Light 2500 - 3M/ESPE; CL) and two blue light emitting diode curing units (Ultraled - Dabi/Atlante; UL; Ultrablue IS - DMC; UB3 and UB6) were selected for this study. Different light intensities (670, 130, 300, and 600 mW/cm², respectively) and different curing times (20s, 40s and 60s) were evaluated. Knoop microhardness test was performed in the area corresponding to the fractured region of the specimen. A total of 12 groups (n=10) were established and the specimens were prepared using a stainless steel mold composed by two similar parts that contained a cone-shaped hole with two diameters (8.0 mm and 5.0 mm) and thickness of 1.0 mm. Next, the specimens were loaded in tensile strength until fracture in a universal testing machine at a crosshead speed of 0.5 mm/min and a 50 kg load cell. For the microhardness test, the same matrix was used to fabricate the specimens (12 groups; n=5). Microhardness was determined on the surfaces that were not exposed to the light source, using a Shimadzu HMV-2 Microhardness Tester at a static load of 50 g for 30 seconds. Data were analyzed statistically by two-way ANOVA and Tukey's test (pUniversidade de São Paulo. Faculdade de Odontologia de Bauru2007-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/jaos/article/view/351410.1590/S1678-77572007000600003Journal of Applied Oral Science; Vol. 15 No. 6 (2007); 470-474 Journal of Applied Oral Science; Vol. 15 Núm. 6 (2007); 470-474 Journal of Applied Oral Science; v. 15 n. 6 (2007); 470-474 1678-77651678-7757reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/jaos/article/view/3514/4204Copyright (c) 2007 Journal of Applied Oral Scienceinfo:eu-repo/semantics/openAccessFranco, Eduardo BatistaSantos, Patrícia Aleixo dosMondelli, Rafael Francisco Lia2012-04-27T11:59:11Zoai:revistas.usp.br:article/3514Revistahttp://www.scielo.br/jaosPUBhttps://www.revistas.usp.br/jaos/oai||jaos@usp.br1678-77651678-7757opendoar:2012-04-27T11:59:11Journal of applied oral science (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv The effect of different light-curing units on tensile strength and microhardness of a composite resin
title The effect of different light-curing units on tensile strength and microhardness of a composite resin
spellingShingle The effect of different light-curing units on tensile strength and microhardness of a composite resin
Franco, Eduardo Batista
Photopolymerization
LED
Microhardness
Tensile strength
title_short The effect of different light-curing units on tensile strength and microhardness of a composite resin
title_full The effect of different light-curing units on tensile strength and microhardness of a composite resin
title_fullStr The effect of different light-curing units on tensile strength and microhardness of a composite resin
title_full_unstemmed The effect of different light-curing units on tensile strength and microhardness of a composite resin
title_sort The effect of different light-curing units on tensile strength and microhardness of a composite resin
author Franco, Eduardo Batista
author_facet Franco, Eduardo Batista
Santos, Patrícia Aleixo dos
Mondelli, Rafael Francisco Lia
author_role author
author2 Santos, Patrícia Aleixo dos
Mondelli, Rafael Francisco Lia
author2_role author
author
dc.contributor.author.fl_str_mv Franco, Eduardo Batista
Santos, Patrícia Aleixo dos
Mondelli, Rafael Francisco Lia
dc.subject.por.fl_str_mv Photopolymerization
LED
Microhardness
Tensile strength
topic Photopolymerization
LED
Microhardness
Tensile strength
description The aim of this study was to evaluate the influence of different light-curing units on the tensile bond strength and microhardness of a composite resin (Filtek Z250 - 3M/ESPE). Conventional halogen (Curing Light 2500 - 3M/ESPE; CL) and two blue light emitting diode curing units (Ultraled - Dabi/Atlante; UL; Ultrablue IS - DMC; UB3 and UB6) were selected for this study. Different light intensities (670, 130, 300, and 600 mW/cm², respectively) and different curing times (20s, 40s and 60s) were evaluated. Knoop microhardness test was performed in the area corresponding to the fractured region of the specimen. A total of 12 groups (n=10) were established and the specimens were prepared using a stainless steel mold composed by two similar parts that contained a cone-shaped hole with two diameters (8.0 mm and 5.0 mm) and thickness of 1.0 mm. Next, the specimens were loaded in tensile strength until fracture in a universal testing machine at a crosshead speed of 0.5 mm/min and a 50 kg load cell. For the microhardness test, the same matrix was used to fabricate the specimens (12 groups; n=5). Microhardness was determined on the surfaces that were not exposed to the light source, using a Shimadzu HMV-2 Microhardness Tester at a static load of 50 g for 30 seconds. Data were analyzed statistically by two-way ANOVA and Tukey's test (p
publishDate 2007
dc.date.none.fl_str_mv 2007-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://www.revistas.usp.br/jaos/article/view/3514
10.1590/S1678-77572007000600003
url https://www.revistas.usp.br/jaos/article/view/3514
identifier_str_mv 10.1590/S1678-77572007000600003
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://www.revistas.usp.br/jaos/article/view/3514/4204
dc.rights.driver.fl_str_mv Copyright (c) 2007 Journal of Applied Oral Science
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2007 Journal of Applied Oral Science
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Odontologia de Bauru
publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Odontologia de Bauru
dc.source.none.fl_str_mv Journal of Applied Oral Science; Vol. 15 No. 6 (2007); 470-474
Journal of Applied Oral Science; Vol. 15 Núm. 6 (2007); 470-474
Journal of Applied Oral Science; v. 15 n. 6 (2007); 470-474
1678-7765
1678-7757
reponame:Journal of applied oral science (Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Journal of applied oral science (Online)
collection Journal of applied oral science (Online)
repository.name.fl_str_mv Journal of applied oral science (Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv ||jaos@usp.br
_version_ 1800221673520103424

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