Effect of the photoactivation method on composite resin cure.
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Clinical and Laboratorial Research in Dentistry |
Texto Completo: | https://www.revistas.usp.br/clrd/article/view/76207 |
Resumo: | For composite resins to obtain good properties, they must present a high degree of conversion and minimal polymerization contraction. To minimize this contraction, alternative photoactivation techniques have been suggested. The objective of this study was to compare the hardness of a photoactivated composite resin using the pulse-delay, soft start and continuous conventional technique, in thicknesses of 1, 2 and 3mm. The resin was activated with halogen light and the photoactivation time and intensity varied according to the technique. The samples were stored in an oven at 37ºC for one week and submitted to the Vickers microhardness test, on both the irradiated surface and the opposite surface. The results were submitted to ANOVA and the Tukey’s test with a level of significance of 5%. It was concluded that the hardness was higher with photoactivation of 40 seconds and for the techniques that had the same photoactivation time (20 seconds) there was no difference in terms of hardness. Therefore the hardness is not influenced by the technique, but rather, by the polymerization time. |
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Clinical and Laboratorial Research in Dentistry |
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Effect of the photoactivation method on composite resin cure.hardnesspolymerizationcomposite resinsFor composite resins to obtain good properties, they must present a high degree of conversion and minimal polymerization contraction. To minimize this contraction, alternative photoactivation techniques have been suggested. The objective of this study was to compare the hardness of a photoactivated composite resin using the pulse-delay, soft start and continuous conventional technique, in thicknesses of 1, 2 and 3mm. The resin was activated with halogen light and the photoactivation time and intensity varied according to the technique. The samples were stored in an oven at 37ºC for one week and submitted to the Vickers microhardness test, on both the irradiated surface and the opposite surface. The results were submitted to ANOVA and the Tukey’s test with a level of significance of 5%. It was concluded that the hardness was higher with photoactivation of 40 seconds and for the techniques that had the same photoactivation time (20 seconds) there was no difference in terms of hardness. Therefore the hardness is not influenced by the technique, but rather, by the polymerization time.Universidade de São Paulo. Faculdade de Odontologia2015-12-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAvaliado pelos paresPeer reviewedapplication/pdfhttps://www.revistas.usp.br/clrd/article/view/7620710.11606/issn.2357-8041.clrd.2015.76207Clinical and Laboratorial Research in Dentistry; v. 21 n. 3 (2015); 156-162Clinical and Laboratorial Research in Dentistry; Vol. 21 No. 3 (2015); 156-1622357-8041reponame:Clinical and Laboratorial Research in Dentistryinstname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/clrd/article/view/76207/129348Copyright (c) 2016 Andrea Tami Abe, Carina Sincler Delfino, Kátia Martins Rode, Miriam Lacalle Turbinoinfo:eu-repo/semantics/openAccessAbe, Andrea TamiDelfino, Carina SinclerRode, Kátia MartinsTurbino, Miriam Lacalle2017-05-29T21:28:53Zoai:revistas.usp.br:article/76207Revistahttps://www.revistas.usp.br/clrdPUBhttps://www.revistas.usp.br/clrd/oai||clrd.fo@usp.br2357-80412357-8041opendoar:2017-05-29T21:28:53Clinical and Laboratorial Research in Dentistry - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Effect of the photoactivation method on composite resin cure. |
title |
Effect of the photoactivation method on composite resin cure. |
spellingShingle |
Effect of the photoactivation method on composite resin cure. Abe, Andrea Tami hardness polymerization composite resins |
title_short |
Effect of the photoactivation method on composite resin cure. |
title_full |
Effect of the photoactivation method on composite resin cure. |
title_fullStr |
Effect of the photoactivation method on composite resin cure. |
title_full_unstemmed |
Effect of the photoactivation method on composite resin cure. |
title_sort |
Effect of the photoactivation method on composite resin cure. |
author |
Abe, Andrea Tami |
author_facet |
Abe, Andrea Tami Delfino, Carina Sincler Rode, Kátia Martins Turbino, Miriam Lacalle |
author_role |
author |
author2 |
Delfino, Carina Sincler Rode, Kátia Martins Turbino, Miriam Lacalle |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Abe, Andrea Tami Delfino, Carina Sincler Rode, Kátia Martins Turbino, Miriam Lacalle |
dc.subject.por.fl_str_mv |
hardness polymerization composite resins |
topic |
hardness polymerization composite resins |
description |
For composite resins to obtain good properties, they must present a high degree of conversion and minimal polymerization contraction. To minimize this contraction, alternative photoactivation techniques have been suggested. The objective of this study was to compare the hardness of a photoactivated composite resin using the pulse-delay, soft start and continuous conventional technique, in thicknesses of 1, 2 and 3mm. The resin was activated with halogen light and the photoactivation time and intensity varied according to the technique. The samples were stored in an oven at 37ºC for one week and submitted to the Vickers microhardness test, on both the irradiated surface and the opposite surface. The results were submitted to ANOVA and the Tukey’s test with a level of significance of 5%. It was concluded that the hardness was higher with photoactivation of 40 seconds and for the techniques that had the same photoactivation time (20 seconds) there was no difference in terms of hardness. Therefore the hardness is not influenced by the technique, but rather, by the polymerization time. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-12-31 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Avaliado pelos pares Peer reviewed |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.revistas.usp.br/clrd/article/view/76207 10.11606/issn.2357-8041.clrd.2015.76207 |
url |
https://www.revistas.usp.br/clrd/article/view/76207 |
identifier_str_mv |
10.11606/issn.2357-8041.clrd.2015.76207 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/clrd/article/view/76207/129348 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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 |
publisher.none.fl_str_mv |
Universidade de São Paulo. Faculdade de Odontologia |
dc.source.none.fl_str_mv |
Clinical and Laboratorial Research in Dentistry; v. 21 n. 3 (2015); 156-162 Clinical and Laboratorial Research in Dentistry; Vol. 21 No. 3 (2015); 156-162 2357-8041 reponame:Clinical and Laboratorial Research in Dentistry instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Clinical and Laboratorial Research in Dentistry |
collection |
Clinical and Laboratorial Research in Dentistry |
repository.name.fl_str_mv |
Clinical and Laboratorial Research in Dentistry - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
||clrd.fo@usp.br |
_version_ |
1800222877743579136 |