The effect of specimen dimensions on the flexural strength of a composite resin

Detalhes bibliográficos
Autor(a) principal: Muench, Antonio
Data de Publicação: 2005
Outros Autores: Correa, Ivo Carlos, Grande, Rosa Helena Miranda, João, Mário
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/3290
Resumo: PUORPOSE: The aim of this study was to evaluate the effect of specimen dimensions on the flexural strength of a composite resin (Heliomolar RO). METHODS: The different dimensions tested - length x width x height (mm) were: 25x2x4; 25x2x2 (ISO 4049); 15x2x2; 10x2x2 and 10x2x1. Light-curing was performed at 600 mW/cm² for 40s, three times along the 25mm specimens, twice along 15mm specimen and once for the 10mm specimens. Specimens of all dimensions were light-cured on both surfaces, or only on one side. In the latter, the load was applied on the irradiated side or on the opposite one. RESULTS: It was shown that the flexural strength was not affected by specimen length. When light-curing was performed on both surfaces, similar flexural strength values were obtained for any dimension. Despite the number of irradiated surfaces, specimens with a height of 1mm also obtained similar values. On the contrary, specimens with a height of 4mm, exposed only on one surface, reached the lowest strength. CONCLUSION: The use of specimens with lower dimensions can lead to flexural strength values similar to the ones obtained with standardized specimen (ISO 4049), with the advantage of demanding less amount of material and being less time consuming.
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spelling The effect of specimen dimensions on the flexural strength of a composite resin Efeito das dimensões do espécime na resistência à flexão de uma resina composta Resinas compostasResistência à flexãoDimensões dos corpos-de-provaComposite resinsFlexural strengthSpecimen dimensions PUORPOSE: The aim of this study was to evaluate the effect of specimen dimensions on the flexural strength of a composite resin (Heliomolar RO). METHODS: The different dimensions tested - length x width x height (mm) were: 25x2x4; 25x2x2 (ISO 4049); 15x2x2; 10x2x2 and 10x2x1. Light-curing was performed at 600 mW/cm² for 40s, three times along the 25mm specimens, twice along 15mm specimen and once for the 10mm specimens. Specimens of all dimensions were light-cured on both surfaces, or only on one side. In the latter, the load was applied on the irradiated side or on the opposite one. RESULTS: It was shown that the flexural strength was not affected by specimen length. When light-curing was performed on both surfaces, similar flexural strength values were obtained for any dimension. Despite the number of irradiated surfaces, specimens with a height of 1mm also obtained similar values. On the contrary, specimens with a height of 4mm, exposed only on one surface, reached the lowest strength. CONCLUSION: The use of specimens with lower dimensions can lead to flexural strength values similar to the ones obtained with standardized specimen (ISO 4049), with the advantage of demanding less amount of material and being less time consuming. OBJETIVO: A finalidade da presente investigação foi avaliar a influência das dimensões dos corpos-de-prova (cp) e da superfície de irradiação na resistência à flexão de uma resina composta (Heliomolar RO). MÉTODOS: As diversas dimensões adotadas - comprimento x largura x altura (mm) foram: 25x2x4; 25x2x2 (ISO 4049); 15x2x2; 10x2x2; 10x2x1. A fotoativação foi realizada por 40 segundos a 600mW/cm²; três vezes ao longo dos cp de 25mm, duas vezes ao longo dos cp de 15mm e uma vez nos cp de 10mm de comprimento. Os corpos-de-prova de todas as dimensões foram ativados em ambas as superfícies, ou apenas em uma; neste caso a carga de ruptura era aplicada na face de irradiação ou na oposta. RESULTADOS: Foi mostrado que a resistência à flexão não foi afetada pelo comprimento dos cp. Com a fotoativação em ambas as superfícies, as resistências obtidas eram semelhantes nos diversos comprimentos. Independentemente do número de faces irradiadas, os cp com 1mm de altura apresentaram resistências semelhantes. Contudo, cp com 4mm de altura e irradiados apenas por um lado, alcançaram os menores valores. CONCLUSÃO: Com o emprego de cp com dimensões menores são alcançados valores de resistência à flexão semelhante aos obtidos com cp padronizados (ISO 4049), com a vantagem de menor demanda de material e menor consumo de tempo (o menor comprimento dos cp requer apenas uma ativação por lado). Universidade de São Paulo. Faculdade de Odontologia de Bauru2005-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/jaos/article/view/329010.1590/S1678-77572005000300012Journal of Applied Oral Science; Vol. 13 No. 3 (2005); 265-268 Journal of Applied Oral Science; Vol. 13 Núm. 3 (2005); 265-268 Journal of Applied Oral Science; v. 13 n. 3 (2005); 265-268 1678-77651678-7757reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/jaos/article/view/3290/3980Copyright (c) 2005 Journal of Applied Oral Scienceinfo:eu-repo/semantics/openAccessMuench, AntonioCorrea, Ivo CarlosGrande, Rosa Helena MirandaJoão, Mário2012-04-27T11:51:05Zoai:revistas.usp.br:article/3290Revistahttp://www.scielo.br/jaosPUBhttps://www.revistas.usp.br/jaos/oai||jaos@usp.br1678-77651678-7757opendoar:2012-04-27T11:51:05Journal of applied oral science (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv The effect of specimen dimensions on the flexural strength of a composite resin
Efeito das dimensões do espécime na resistência à flexão de uma resina composta
title The effect of specimen dimensions on the flexural strength of a composite resin
spellingShingle The effect of specimen dimensions on the flexural strength of a composite resin
Muench, Antonio
Resinas compostas
Resistência à flexão
Dimensões dos corpos-de-prova
Composite resins
Flexural strength
Specimen dimensions
title_short The effect of specimen dimensions on the flexural strength of a composite resin
title_full The effect of specimen dimensions on the flexural strength of a composite resin
title_fullStr The effect of specimen dimensions on the flexural strength of a composite resin
title_full_unstemmed The effect of specimen dimensions on the flexural strength of a composite resin
title_sort The effect of specimen dimensions on the flexural strength of a composite resin
author Muench, Antonio
author_facet Muench, Antonio
Correa, Ivo Carlos
Grande, Rosa Helena Miranda
João, Mário
author_role author
author2 Correa, Ivo Carlos
Grande, Rosa Helena Miranda
João, Mário
author2_role author
author
author
dc.contributor.author.fl_str_mv Muench, Antonio
Correa, Ivo Carlos
Grande, Rosa Helena Miranda
João, Mário
dc.subject.por.fl_str_mv Resinas compostas
Resistência à flexão
Dimensões dos corpos-de-prova
Composite resins
Flexural strength
Specimen dimensions
topic Resinas compostas
Resistência à flexão
Dimensões dos corpos-de-prova
Composite resins
Flexural strength
Specimen dimensions
description PUORPOSE: The aim of this study was to evaluate the effect of specimen dimensions on the flexural strength of a composite resin (Heliomolar RO). METHODS: The different dimensions tested - length x width x height (mm) were: 25x2x4; 25x2x2 (ISO 4049); 15x2x2; 10x2x2 and 10x2x1. Light-curing was performed at 600 mW/cm² for 40s, three times along the 25mm specimens, twice along 15mm specimen and once for the 10mm specimens. Specimens of all dimensions were light-cured on both surfaces, or only on one side. In the latter, the load was applied on the irradiated side or on the opposite one. RESULTS: It was shown that the flexural strength was not affected by specimen length. When light-curing was performed on both surfaces, similar flexural strength values were obtained for any dimension. Despite the number of irradiated surfaces, specimens with a height of 1mm also obtained similar values. On the contrary, specimens with a height of 4mm, exposed only on one surface, reached the lowest strength. CONCLUSION: The use of specimens with lower dimensions can lead to flexural strength values similar to the ones obtained with standardized specimen (ISO 4049), with the advantage of demanding less amount of material and being less time consuming.
publishDate 2005
dc.date.none.fl_str_mv 2005-09-01
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/3290
10.1590/S1678-77572005000300012
url https://www.revistas.usp.br/jaos/article/view/3290
identifier_str_mv 10.1590/S1678-77572005000300012
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://www.revistas.usp.br/jaos/article/view/3290/3980
dc.rights.driver.fl_str_mv Copyright (c) 2005 Journal of Applied Oral Science
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2005 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. 13 No. 3 (2005); 265-268
Journal of Applied Oral Science; Vol. 13 Núm. 3 (2005); 265-268
Journal of Applied Oral Science; v. 13 n. 3 (2005); 265-268
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
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