Effect of thickness of indirect restoration and distance from the light-curing unit tip on the hardness of a dual-cured resin cement
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Dental Journal |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402010000200005 |
Resumo: | This study evaluated the Knoop hardness and polymerization depth of a dual-cured resin cement, light-activated at different distances through different thicknesses of composite resin. One bovine incisor was embedded in resin and its buccal surface was flattened. Dentin was covered with PVC film where a mold (0.8-mm-thick and 5 mm diameter) was filled with cement and covered with another PVC film. Light curing (40 s) was carried out through resin discs (2, 3, 4 or 5 mm) with a halogen light positioned 0, 1, 2 or 3 mm from the resin surface. After storage, specimens were sectioned for hardness measurements (top, center, and bottom). Data were subjected to split-plot ANOVA and Tukey's test (a=0.05). The increase in resin disc thickness decreased cement hardness. The increase in the distance of the light-curing tip decreased hardness at the top region. Specimens showed the lowest hardness values at the bottom, and the highest at the center. Resin cement hardness was influenced by the thickness of the indirect restoration and by the distance between the light-curing unit tip and the resin cement surface. |
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Brazilian Dental Journal |
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Effect of thickness of indirect restoration and distance from the light-curing unit tip on the hardness of a dual-cured resin cementhardnessdental materialsresin cementscomposite resinThis study evaluated the Knoop hardness and polymerization depth of a dual-cured resin cement, light-activated at different distances through different thicknesses of composite resin. One bovine incisor was embedded in resin and its buccal surface was flattened. Dentin was covered with PVC film where a mold (0.8-mm-thick and 5 mm diameter) was filled with cement and covered with another PVC film. Light curing (40 s) was carried out through resin discs (2, 3, 4 or 5 mm) with a halogen light positioned 0, 1, 2 or 3 mm from the resin surface. After storage, specimens were sectioned for hardness measurements (top, center, and bottom). Data were subjected to split-plot ANOVA and Tukey's test (a=0.05). The increase in resin disc thickness decreased cement hardness. The increase in the distance of the light-curing tip decreased hardness at the top region. Specimens showed the lowest hardness values at the bottom, and the highest at the center. Resin cement hardness was influenced by the thickness of the indirect restoration and by the distance between the light-curing unit tip and the resin cement surface.Fundação Odontológica de Ribeirão Preto2010-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402010000200005Brazilian Dental Journal v.21 n.2 2010reponame:Brazilian Dental Journalinstname:Fundação Odontológica de Ribeirão Preto (FUNORP)instacron:FUNORP10.1590/S0103-64402010000200005info:eu-repo/semantics/openAccessPaula,Andréia Bolzan deTango,Rubens NisieSinhoreti,Mário Alexandre CoelhoAlves,Marcelo CorrêaPuppin-Rontani,Regina M.eng2010-07-07T00:00:00Zoai:scielo:S0103-64402010000200005Revistahttps://www.scielo.br/j/bdj/https://old.scielo.br/oai/scielo-oai.phpbdj@forp.usp.br||sergio@fosjc.unesp.br1806-47600103-6440opendoar:2010-07-07T00:00Brazilian Dental Journal - Fundação Odontológica de Ribeirão Preto (FUNORP)false |
dc.title.none.fl_str_mv |
Effect of thickness of indirect restoration and distance from the light-curing unit tip on the hardness of a dual-cured resin cement |
title |
Effect of thickness of indirect restoration and distance from the light-curing unit tip on the hardness of a dual-cured resin cement |
spellingShingle |
Effect of thickness of indirect restoration and distance from the light-curing unit tip on the hardness of a dual-cured resin cement Paula,Andréia Bolzan de hardness dental materials resin cements composite resin |
title_short |
Effect of thickness of indirect restoration and distance from the light-curing unit tip on the hardness of a dual-cured resin cement |
title_full |
Effect of thickness of indirect restoration and distance from the light-curing unit tip on the hardness of a dual-cured resin cement |
title_fullStr |
Effect of thickness of indirect restoration and distance from the light-curing unit tip on the hardness of a dual-cured resin cement |
title_full_unstemmed |
Effect of thickness of indirect restoration and distance from the light-curing unit tip on the hardness of a dual-cured resin cement |
title_sort |
Effect of thickness of indirect restoration and distance from the light-curing unit tip on the hardness of a dual-cured resin cement |
author |
Paula,Andréia Bolzan de |
author_facet |
Paula,Andréia Bolzan de Tango,Rubens Nisie Sinhoreti,Mário Alexandre Coelho Alves,Marcelo Corrêa Puppin-Rontani,Regina M. |
author_role |
author |
author2 |
Tango,Rubens Nisie Sinhoreti,Mário Alexandre Coelho Alves,Marcelo Corrêa Puppin-Rontani,Regina M. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Paula,Andréia Bolzan de Tango,Rubens Nisie Sinhoreti,Mário Alexandre Coelho Alves,Marcelo Corrêa Puppin-Rontani,Regina M. |
dc.subject.por.fl_str_mv |
hardness dental materials resin cements composite resin |
topic |
hardness dental materials resin cements composite resin |
description |
This study evaluated the Knoop hardness and polymerization depth of a dual-cured resin cement, light-activated at different distances through different thicknesses of composite resin. One bovine incisor was embedded in resin and its buccal surface was flattened. Dentin was covered with PVC film where a mold (0.8-mm-thick and 5 mm diameter) was filled with cement and covered with another PVC film. Light curing (40 s) was carried out through resin discs (2, 3, 4 or 5 mm) with a halogen light positioned 0, 1, 2 or 3 mm from the resin surface. After storage, specimens were sectioned for hardness measurements (top, center, and bottom). Data were subjected to split-plot ANOVA and Tukey's test (a=0.05). The increase in resin disc thickness decreased cement hardness. The increase in the distance of the light-curing tip decreased hardness at the top region. Specimens showed the lowest hardness values at the bottom, and the highest at the center. Resin cement hardness was influenced by the thickness of the indirect restoration and by the distance between the light-curing unit tip and the resin cement surface. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-01-01 |
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=S0103-64402010000200005 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402010000200005 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-64402010000200005 |
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 |
Fundação Odontológica de Ribeirão Preto |
publisher.none.fl_str_mv |
Fundação Odontológica de Ribeirão Preto |
dc.source.none.fl_str_mv |
Brazilian Dental Journal v.21 n.2 2010 reponame:Brazilian Dental Journal instname:Fundação Odontológica de Ribeirão Preto (FUNORP) instacron:FUNORP |
instname_str |
Fundação Odontológica de Ribeirão Preto (FUNORP) |
instacron_str |
FUNORP |
institution |
FUNORP |
reponame_str |
Brazilian Dental Journal |
collection |
Brazilian Dental Journal |
repository.name.fl_str_mv |
Brazilian Dental Journal - Fundação Odontológica de Ribeirão Preto (FUNORP) |
repository.mail.fl_str_mv |
bdj@forp.usp.br||sergio@fosjc.unesp.br |
_version_ |
1754204091325612032 |