Effect of light-curing units and activation mode on polymerization shrinkage and shrinkage stress of composite resins

Detalhes bibliográficos
Autor(a) principal: Lopes,Lawrence Gonzaga
Data de Publicação: 2008
Outros Autores: Franco,Eduardo Batista, Pereira,José Carlos, Mondelli,Rafael Francisco Lia
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=S1678-77572008000100008
Resumo: The aim of this study was to evaluate the polymerization shrinkage and shrinkage stress of composites polymerized with a LED and a quartz tungsten halogen (QTH) light sources. The LED was used in a conventional mode (CM) and the QTH was used in both conventional and pulse-delay modes (PD). The composite resins used were Z100, A110, SureFil and Bisfil 2B (chemical-cured). Composite deformation upon polymerization was measured by the strain gauge method. The shrinkage stress was measured by photoelastic analysis. The polymerization shrinkage data were analyzed statistically using two-way ANOVA and Tukey test (p<0.05), and the stress data were analyzed by one-way ANOVA and Tukey's test (p<0.05). Shrinkage and stress means of Bisfil 2B were statistically significant lower than those of Z100, A110 and SureFil. In general, the PD mode reduced the contraction and the stress values when compared to CM. LED generated the same stress as QTH in conventional mode. Regardless of the activation mode, SureFil produced lower contraction and stress values than the other light-cured resins. Conversely, Z100 and A110 produced the greatest contraction and stress values. As expected, the chemically cured resin generated lower shrinkage and stress than the light-cured resins. In conclusion, The PD mode effectively decreased contraction stress for Z100 and A110. Development of stress in light-cured resins depended on the shrinkage value.
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spelling Effect of light-curing units and activation mode on polymerization shrinkage and shrinkage stress of composite resinsDental materialsPolymerization shrinkageComposite resinsStressLight emitting diodeHalogen lightThe aim of this study was to evaluate the polymerization shrinkage and shrinkage stress of composites polymerized with a LED and a quartz tungsten halogen (QTH) light sources. The LED was used in a conventional mode (CM) and the QTH was used in both conventional and pulse-delay modes (PD). The composite resins used were Z100, A110, SureFil and Bisfil 2B (chemical-cured). Composite deformation upon polymerization was measured by the strain gauge method. The shrinkage stress was measured by photoelastic analysis. The polymerization shrinkage data were analyzed statistically using two-way ANOVA and Tukey test (p<0.05), and the stress data were analyzed by one-way ANOVA and Tukey's test (p<0.05). Shrinkage and stress means of Bisfil 2B were statistically significant lower than those of Z100, A110 and SureFil. In general, the PD mode reduced the contraction and the stress values when compared to CM. LED generated the same stress as QTH in conventional mode. Regardless of the activation mode, SureFil produced lower contraction and stress values than the other light-cured resins. Conversely, Z100 and A110 produced the greatest contraction and stress values. As expected, the chemically cured resin generated lower shrinkage and stress than the light-cured resins. In conclusion, The PD mode effectively decreased contraction stress for Z100 and A110. Development of stress in light-cured resins depended on the shrinkage value.Faculdade De Odontologia De Bauru - USP2008-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572008000100008Journal of Applied Oral Science v.16 n.1 2008reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S1678-77572008000100008info:eu-repo/semantics/openAccessLopes,Lawrence GonzagaFranco,Eduardo BatistaPereira,José CarlosMondelli,Rafael Francisco Liaeng2008-01-31T00:00:00Zoai:scielo:S1678-77572008000100008Revistahttp://www.scielo.br/jaosPUBhttps://old.scielo.br/oai/scielo-oai.php||jaos@usp.br1678-77651678-7757opendoar:2008-01-31T00:00Journal of applied oral science (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Effect of light-curing units and activation mode on polymerization shrinkage and shrinkage stress of composite resins
title Effect of light-curing units and activation mode on polymerization shrinkage and shrinkage stress of composite resins
spellingShingle Effect of light-curing units and activation mode on polymerization shrinkage and shrinkage stress of composite resins
Lopes,Lawrence Gonzaga
Dental materials
Polymerization shrinkage
Composite resins
Stress
Light emitting diode
Halogen light
title_short Effect of light-curing units and activation mode on polymerization shrinkage and shrinkage stress of composite resins
title_full Effect of light-curing units and activation mode on polymerization shrinkage and shrinkage stress of composite resins
title_fullStr Effect of light-curing units and activation mode on polymerization shrinkage and shrinkage stress of composite resins
title_full_unstemmed Effect of light-curing units and activation mode on polymerization shrinkage and shrinkage stress of composite resins
title_sort Effect of light-curing units and activation mode on polymerization shrinkage and shrinkage stress of composite resins
author Lopes,Lawrence Gonzaga
author_facet Lopes,Lawrence Gonzaga
Franco,Eduardo Batista
Pereira,José Carlos
Mondelli,Rafael Francisco Lia
author_role author
author2 Franco,Eduardo Batista
Pereira,José Carlos
Mondelli,Rafael Francisco Lia
author2_role author
author
author
dc.contributor.author.fl_str_mv Lopes,Lawrence Gonzaga
Franco,Eduardo Batista
Pereira,José Carlos
Mondelli,Rafael Francisco Lia
dc.subject.por.fl_str_mv Dental materials
Polymerization shrinkage
Composite resins
Stress
Light emitting diode
Halogen light
topic Dental materials
Polymerization shrinkage
Composite resins
Stress
Light emitting diode
Halogen light
description The aim of this study was to evaluate the polymerization shrinkage and shrinkage stress of composites polymerized with a LED and a quartz tungsten halogen (QTH) light sources. The LED was used in a conventional mode (CM) and the QTH was used in both conventional and pulse-delay modes (PD). The composite resins used were Z100, A110, SureFil and Bisfil 2B (chemical-cured). Composite deformation upon polymerization was measured by the strain gauge method. The shrinkage stress was measured by photoelastic analysis. The polymerization shrinkage data were analyzed statistically using two-way ANOVA and Tukey test (p<0.05), and the stress data were analyzed by one-way ANOVA and Tukey's test (p<0.05). Shrinkage and stress means of Bisfil 2B were statistically significant lower than those of Z100, A110 and SureFil. In general, the PD mode reduced the contraction and the stress values when compared to CM. LED generated the same stress as QTH in conventional mode. Regardless of the activation mode, SureFil produced lower contraction and stress values than the other light-cured resins. Conversely, Z100 and A110 produced the greatest contraction and stress values. As expected, the chemically cured resin generated lower shrinkage and stress than the light-cured resins. In conclusion, The PD mode effectively decreased contraction stress for Z100 and A110. Development of stress in light-cured resins depended on the shrinkage value.
publishDate 2008
dc.date.none.fl_str_mv 2008-02-01
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=S1678-77572008000100008
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572008000100008
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1678-77572008000100008
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.1 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
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