Effect of exposure time vs. irradiance on knoop hardness of dental composites

Detalhes bibliográficos
Autor(a) principal: Correr,Américo Bortolazzo
Data de Publicação: 2006
Outros Autores: Sinhoreti,Mário Alexandre Coelho, Correr-Sobrinho,Lourenço, Tango,Rubens Nisie, Consani,Simonides, Schneider,Luis Felipe Jochins
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Materials research (São Carlos. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000300006
Resumo: A comparison was made of the hardness of Z250 and Esthet-X composites light cured with different light sources. Cavities (3 mm diameter x 6 mm deep) were prepared in 240 bovine incisors. The composite was bulk inserted and light-cured using halogen light, LED or xenon plasma arc (PAC) with different irradiances and exposure times, maintaining the same energy density. The specimens were stored in an incubator at 37 °C for 24 hours prior to sectioning for hardness measurements. Three measurements were taken at each depth: surface, 1, 2, 3, 4 and 5 mm. The data were analyzed by ANOVA and Tukey's test (p < 0.05). No statistically significant differences were found for LED up to 2 mm, for PAC up to 3 mm, and for halogen light up to 5 mm. Photoactivation with intermediate power density and exposure time resulted in the highest Knoop hardness values.
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spelling Effect of exposure time vs. irradiance on knoop hardness of dental compositescomposite resinenergy densityKnoop hardnesslight curingA comparison was made of the hardness of Z250 and Esthet-X composites light cured with different light sources. Cavities (3 mm diameter x 6 mm deep) were prepared in 240 bovine incisors. The composite was bulk inserted and light-cured using halogen light, LED or xenon plasma arc (PAC) with different irradiances and exposure times, maintaining the same energy density. The specimens were stored in an incubator at 37 °C for 24 hours prior to sectioning for hardness measurements. Three measurements were taken at each depth: surface, 1, 2, 3, 4 and 5 mm. The data were analyzed by ANOVA and Tukey's test (p < 0.05). No statistically significant differences were found for LED up to 2 mm, for PAC up to 3 mm, and for halogen light up to 5 mm. Photoactivation with intermediate power density and exposure time resulted in the highest Knoop hardness values.ABM, ABC, ABPol2006-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000300006Materials Research v.9 n.3 2006reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392006000300006info:eu-repo/semantics/openAccessCorrer,Américo BortolazzoSinhoreti,Mário Alexandre CoelhoCorrer-Sobrinho,LourençoTango,Rubens NisieConsani,SimonidesSchneider,Luis Felipe Jochinseng2006-10-19T00:00:00Zoai:scielo:S1516-14392006000300006Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2006-10-19T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false
dc.title.none.fl_str_mv Effect of exposure time vs. irradiance on knoop hardness of dental composites
title Effect of exposure time vs. irradiance on knoop hardness of dental composites
spellingShingle Effect of exposure time vs. irradiance on knoop hardness of dental composites
Correr,Américo Bortolazzo
composite resin
energy density
Knoop hardness
light curing
title_short Effect of exposure time vs. irradiance on knoop hardness of dental composites
title_full Effect of exposure time vs. irradiance on knoop hardness of dental composites
title_fullStr Effect of exposure time vs. irradiance on knoop hardness of dental composites
title_full_unstemmed Effect of exposure time vs. irradiance on knoop hardness of dental composites
title_sort Effect of exposure time vs. irradiance on knoop hardness of dental composites
author Correr,Américo Bortolazzo
author_facet Correr,Américo Bortolazzo
Sinhoreti,Mário Alexandre Coelho
Correr-Sobrinho,Lourenço
Tango,Rubens Nisie
Consani,Simonides
Schneider,Luis Felipe Jochins
author_role author
author2 Sinhoreti,Mário Alexandre Coelho
Correr-Sobrinho,Lourenço
Tango,Rubens Nisie
Consani,Simonides
Schneider,Luis Felipe Jochins
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Correr,Américo Bortolazzo
Sinhoreti,Mário Alexandre Coelho
Correr-Sobrinho,Lourenço
Tango,Rubens Nisie
Consani,Simonides
Schneider,Luis Felipe Jochins
dc.subject.por.fl_str_mv composite resin
energy density
Knoop hardness
light curing
topic composite resin
energy density
Knoop hardness
light curing
description A comparison was made of the hardness of Z250 and Esthet-X composites light cured with different light sources. Cavities (3 mm diameter x 6 mm deep) were prepared in 240 bovine incisors. The composite was bulk inserted and light-cured using halogen light, LED or xenon plasma arc (PAC) with different irradiances and exposure times, maintaining the same energy density. The specimens were stored in an incubator at 37 °C for 24 hours prior to sectioning for hardness measurements. Three measurements were taken at each depth: surface, 1, 2, 3, 4 and 5 mm. The data were analyzed by ANOVA and Tukey's test (p < 0.05). No statistically significant differences were found for LED up to 2 mm, for PAC up to 3 mm, and for halogen light up to 5 mm. Photoactivation with intermediate power density and exposure time resulted in the highest Knoop hardness values.
publishDate 2006
dc.date.none.fl_str_mv 2006-09-01
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=S1516-14392006000300006
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392006000300006
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-14392006000300006
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 ABM, ABC, ABPol
publisher.none.fl_str_mv ABM, ABC, ABPol
dc.source.none.fl_str_mv Materials Research v.9 n.3 2006
reponame:Materials research (São Carlos. Online)
instname:Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
instname_str Universidade Federal de São Carlos (UFSCAR)
instacron_str ABM ABC ABPOL
institution ABM ABC ABPOL
reponame_str Materials research (São Carlos. Online)
collection Materials research (São Carlos. Online)
repository.name.fl_str_mv Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)
repository.mail.fl_str_mv dedz@power.ufscar.br
_version_ 1754212658463113216

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