Influence of the curing method on the post-polymerization shrinkage stress of a composite resin
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of applied oral science (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572008000400007 |
Resumo: | The aim of this study was to evaluate the effect of different curing methods on the stress generated by the polymerization shrinkage of a restorative composite in two moments: immediately after light exposure and after 5 min. Photoactivation was performed using two different light sources: (1) xenon plasma arc (PAC) light (1,500 mW/cm2 - 3s) and (2) a quartz-tungsten-halogen (QTH) light with three light-curing regimens: continuous exposure (40 s at 800 mW/cm2 - CL); soft-start (10 s at 150 mW/cm2 and 30 s at 800 mW/cm2 - SS) and intermittent light [cycles of 4 s (2 s with light on at 600 mW/cm2 and 2 s of light off), for 80s - IL]. The composite resin was applied between two 5-mm diameter metallic rods, mounted in a servohydraulic machine. The maximum stress was recorded immediately after light exposure (FF) and after 5 min (5F). The results were submitted to ANOVA and Tukey's test (5%). For each method, the results obtained in FF and 5F were, respectively: CL (3.58 and 4.46 MPa); SS (2.99 and 4.36 MPa); IL (3.11 and 4.32 MPa) and PAC (0.72 and 3.27 MPa). The stress generated by the polymerization shrinkage during light exposure can be associated with the photoactivation method used. A significant increase in the stress level was observed during the post-curing period up to 5 min, for all evaluated methods. |
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Journal of applied oral science (Online) |
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Influence of the curing method on the post-polymerization shrinkage stress of a composite resinComposite resinsStressPost-curingThe aim of this study was to evaluate the effect of different curing methods on the stress generated by the polymerization shrinkage of a restorative composite in two moments: immediately after light exposure and after 5 min. Photoactivation was performed using two different light sources: (1) xenon plasma arc (PAC) light (1,500 mW/cm2 - 3s) and (2) a quartz-tungsten-halogen (QTH) light with three light-curing regimens: continuous exposure (40 s at 800 mW/cm2 - CL); soft-start (10 s at 150 mW/cm2 and 30 s at 800 mW/cm2 - SS) and intermittent light [cycles of 4 s (2 s with light on at 600 mW/cm2 and 2 s of light off), for 80s - IL]. The composite resin was applied between two 5-mm diameter metallic rods, mounted in a servohydraulic machine. The maximum stress was recorded immediately after light exposure (FF) and after 5 min (5F). The results were submitted to ANOVA and Tukey's test (5%). For each method, the results obtained in FF and 5F were, respectively: CL (3.58 and 4.46 MPa); SS (2.99 and 4.36 MPa); IL (3.11 and 4.32 MPa) and PAC (0.72 and 3.27 MPa). The stress generated by the polymerization shrinkage during light exposure can be associated with the photoactivation method used. A significant increase in the stress level was observed during the post-curing period up to 5 min, for all evaluated methods.Faculdade De Odontologia De Bauru - USP2008-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572008000400007Journal of Applied Oral Science v.16 n.4 2008reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S1678-77572008000400007info:eu-repo/semantics/openAccessCunha,Leonardo GonçalvesAlonso,Roberta Caroline BruschiSouza-Junior,Eduardo José Carvalho deNeves,Ana Christina Elias ClaroCorrer-Sobrinho,LourençoSinhoreti,Mário Alexandre Coelhoeng2008-07-14T00:00:00Zoai:scielo:S1678-77572008000400007Revistahttp://www.scielo.br/jaosPUBhttps://old.scielo.br/oai/scielo-oai.php||jaos@usp.br1678-77651678-7757opendoar:2008-07-14T00:00Journal of applied oral science (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Influence of the curing method on the post-polymerization shrinkage stress of a composite resin |
title |
Influence of the curing method on the post-polymerization shrinkage stress of a composite resin |
spellingShingle |
Influence of the curing method on the post-polymerization shrinkage stress of a composite resin Cunha,Leonardo Gonçalves Composite resins Stress Post-curing |
title_short |
Influence of the curing method on the post-polymerization shrinkage stress of a composite resin |
title_full |
Influence of the curing method on the post-polymerization shrinkage stress of a composite resin |
title_fullStr |
Influence of the curing method on the post-polymerization shrinkage stress of a composite resin |
title_full_unstemmed |
Influence of the curing method on the post-polymerization shrinkage stress of a composite resin |
title_sort |
Influence of the curing method on the post-polymerization shrinkage stress of a composite resin |
author |
Cunha,Leonardo Gonçalves |
author_facet |
Cunha,Leonardo Gonçalves Alonso,Roberta Caroline Bruschi Souza-Junior,Eduardo José Carvalho de Neves,Ana Christina Elias Claro Correr-Sobrinho,Lourenço Sinhoreti,Mário Alexandre Coelho |
author_role |
author |
author2 |
Alonso,Roberta Caroline Bruschi Souza-Junior,Eduardo José Carvalho de Neves,Ana Christina Elias Claro Correr-Sobrinho,Lourenço Sinhoreti,Mário Alexandre Coelho |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Cunha,Leonardo Gonçalves Alonso,Roberta Caroline Bruschi Souza-Junior,Eduardo José Carvalho de Neves,Ana Christina Elias Claro Correr-Sobrinho,Lourenço Sinhoreti,Mário Alexandre Coelho |
dc.subject.por.fl_str_mv |
Composite resins Stress Post-curing |
topic |
Composite resins Stress Post-curing |
description |
The aim of this study was to evaluate the effect of different curing methods on the stress generated by the polymerization shrinkage of a restorative composite in two moments: immediately after light exposure and after 5 min. Photoactivation was performed using two different light sources: (1) xenon plasma arc (PAC) light (1,500 mW/cm2 - 3s) and (2) a quartz-tungsten-halogen (QTH) light with three light-curing regimens: continuous exposure (40 s at 800 mW/cm2 - CL); soft-start (10 s at 150 mW/cm2 and 30 s at 800 mW/cm2 - SS) and intermittent light [cycles of 4 s (2 s with light on at 600 mW/cm2 and 2 s of light off), for 80s - IL]. The composite resin was applied between two 5-mm diameter metallic rods, mounted in a servohydraulic machine. The maximum stress was recorded immediately after light exposure (FF) and after 5 min (5F). The results were submitted to ANOVA and Tukey's test (5%). For each method, the results obtained in FF and 5F were, respectively: CL (3.58 and 4.46 MPa); SS (2.99 and 4.36 MPa); IL (3.11 and 4.32 MPa) and PAC (0.72 and 3.27 MPa). The stress generated by the polymerization shrinkage during light exposure can be associated with the photoactivation method used. A significant increase in the stress level was observed during the post-curing period up to 5 min, for all evaluated methods. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-08-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572008000400007 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572008000400007 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1678-77572008000400007 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Faculdade De Odontologia De Bauru - USP |
publisher.none.fl_str_mv |
Faculdade De Odontologia De Bauru - USP |
dc.source.none.fl_str_mv |
Journal of Applied Oral Science v.16 n.4 2008 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_ |
1748936435167133696 |