Knoop hardness of composites cured with halogen and led light-curing units in class I restorations
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian journal of oral sciences (Online) |
Texto Completo: | https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642325 |
Resumo: | Aim: To evaluate the effect of light-curing units (LCUs) on the microhardness of class I composite restorations at different depths. Methods: Two light emitting diodes (LED) (Freelight 2, Radii) and one halogen (Optilux 501) LCUs were evaluated. Thirty class I cavities prepared in human third molars were restored with a microhybrid (Charisma) and a microfilled (Renamel) resin composite. After seven days of water storage, the teeth were decoronated and the crowns were bisected mesiodistally and tested for microhardness under a 25 g load for 20 seconds. Fifteen indentations were performed at three depths for each half-crown. Results: Charisma presented significantly higher Knoop hardness number (KHN) values than Renamel. At the superficial depth, there were no statistically significant differences (p > 0.05) when Charisma was cured with both LED curing units. However, statistically significant difference (p < 0.05) was found when Charisma was light-cured with the halogen LCU. The lowest KHN value was obtained by Renamel light-cured with both LED LCUs, regardless of the composite. Nevertheless, when the microfilled composite was light-cured with the halogen LCU, hardness was significantly higher compared to those cured with LED units at all evaluated depths. Conclusions: The effectiveness of polymerization is related not only to the light-curing source, but also to the type of composite and the curing depth. |
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UNICAMP-8 |
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Brazilian journal of oral sciences (Online) |
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Knoop hardness of composites cured with halogen and led light-curing units in class I restorationsComposite resinsHardnessOdontologyAim: To evaluate the effect of light-curing units (LCUs) on the microhardness of class I composite restorations at different depths. Methods: Two light emitting diodes (LED) (Freelight 2, Radii) and one halogen (Optilux 501) LCUs were evaluated. Thirty class I cavities prepared in human third molars were restored with a microhybrid (Charisma) and a microfilled (Renamel) resin composite. After seven days of water storage, the teeth were decoronated and the crowns were bisected mesiodistally and tested for microhardness under a 25 g load for 20 seconds. Fifteen indentations were performed at three depths for each half-crown. Results: Charisma presented significantly higher Knoop hardness number (KHN) values than Renamel. At the superficial depth, there were no statistically significant differences (p > 0.05) when Charisma was cured with both LED curing units. However, statistically significant difference (p < 0.05) was found when Charisma was light-cured with the halogen LCU. The lowest KHN value was obtained by Renamel light-cured with both LED LCUs, regardless of the composite. Nevertheless, when the microfilled composite was light-cured with the halogen LCU, hardness was significantly higher compared to those cured with LED units at all evaluated depths. Conclusions: The effectiveness of polymerization is related not only to the light-curing source, but also to the type of composite and the curing depth.Universidade Estadual de Campinas2015-12-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/864232510.20396/bjos.v8i1.8642325Brazilian Journal of Oral Sciences; v. 8 n. 1 (2009): Apr./Jun.; 30-33Brazilian Journal of Oral Sciences; Vol. 8 No. 1 (2009): Apr./Jun.; 30-331677-3225reponame:Brazilian journal of oral sciences (Online)instname:Universidade Estadual de Campinas (UNICAMP)instacron:UNICAMPenghttps://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642325/9798Giorgi, Maria Cecília C.Paulillo, Luís Alexandre Maffei Sartiniinfo:eu-repo/semantics/openAccess2016-02-25T09:24:35Zoai:ojs.periodicos.sbu.unicamp.br:article/8642325Revistahttps://periodicos.sbu.unicamp.br/ojs/index.php/bjos/PUBhttps://periodicos.sbu.unicamp.br/ojs/index.php/bjos/oaibrjorals@fop.unicamp.br||brjorals@fop.unicamp.br1677-32251677-3217opendoar:2016-02-25T09:24:35Brazilian journal of oral sciences (Online) - Universidade Estadual de Campinas (UNICAMP)false |
dc.title.none.fl_str_mv |
Knoop hardness of composites cured with halogen and led light-curing units in class I restorations |
title |
Knoop hardness of composites cured with halogen and led light-curing units in class I restorations |
spellingShingle |
Knoop hardness of composites cured with halogen and led light-curing units in class I restorations Giorgi, Maria Cecília C. Composite resins Hardness Odontology |
title_short |
Knoop hardness of composites cured with halogen and led light-curing units in class I restorations |
title_full |
Knoop hardness of composites cured with halogen and led light-curing units in class I restorations |
title_fullStr |
Knoop hardness of composites cured with halogen and led light-curing units in class I restorations |
title_full_unstemmed |
Knoop hardness of composites cured with halogen and led light-curing units in class I restorations |
title_sort |
Knoop hardness of composites cured with halogen and led light-curing units in class I restorations |
author |
Giorgi, Maria Cecília C. |
author_facet |
Giorgi, Maria Cecília C. Paulillo, Luís Alexandre Maffei Sartini |
author_role |
author |
author2 |
Paulillo, Luís Alexandre Maffei Sartini |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Giorgi, Maria Cecília C. Paulillo, Luís Alexandre Maffei Sartini |
dc.subject.por.fl_str_mv |
Composite resins Hardness Odontology |
topic |
Composite resins Hardness Odontology |
description |
Aim: To evaluate the effect of light-curing units (LCUs) on the microhardness of class I composite restorations at different depths. Methods: Two light emitting diodes (LED) (Freelight 2, Radii) and one halogen (Optilux 501) LCUs were evaluated. Thirty class I cavities prepared in human third molars were restored with a microhybrid (Charisma) and a microfilled (Renamel) resin composite. After seven days of water storage, the teeth were decoronated and the crowns were bisected mesiodistally and tested for microhardness under a 25 g load for 20 seconds. Fifteen indentations were performed at three depths for each half-crown. Results: Charisma presented significantly higher Knoop hardness number (KHN) values than Renamel. At the superficial depth, there were no statistically significant differences (p > 0.05) when Charisma was cured with both LED curing units. However, statistically significant difference (p < 0.05) was found when Charisma was light-cured with the halogen LCU. The lowest KHN value was obtained by Renamel light-cured with both LED LCUs, regardless of the composite. Nevertheless, when the microfilled composite was light-cured with the halogen LCU, hardness was significantly higher compared to those cured with LED units at all evaluated depths. Conclusions: The effectiveness of polymerization is related not only to the light-curing source, but also to the type of composite and the curing depth. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-12-17 |
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://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642325 10.20396/bjos.v8i1.8642325 |
url |
https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642325 |
identifier_str_mv |
10.20396/bjos.v8i1.8642325 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8642325/9798 |
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 Estadual de Campinas |
publisher.none.fl_str_mv |
Universidade Estadual de Campinas |
dc.source.none.fl_str_mv |
Brazilian Journal of Oral Sciences; v. 8 n. 1 (2009): Apr./Jun.; 30-33 Brazilian Journal of Oral Sciences; Vol. 8 No. 1 (2009): Apr./Jun.; 30-33 1677-3225 reponame:Brazilian journal of oral sciences (Online) instname:Universidade Estadual de Campinas (UNICAMP) instacron:UNICAMP |
instname_str |
Universidade Estadual de Campinas (UNICAMP) |
instacron_str |
UNICAMP |
institution |
UNICAMP |
reponame_str |
Brazilian journal of oral sciences (Online) |
collection |
Brazilian journal of oral sciences (Online) |
repository.name.fl_str_mv |
Brazilian journal of oral sciences (Online) - Universidade Estadual de Campinas (UNICAMP) |
repository.mail.fl_str_mv |
brjorals@fop.unicamp.br||brjorals@fop.unicamp.br |
_version_ |
1800216401051385856 |