Effect of light-curing units and activation mode on polymerization shrinkage and shrinkage stress of composite resins
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=S1678-77572008000100008 |
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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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 |
_version_ |
1748936434816909312 |