Hardening of a dual-cure resin cement using QTH and LED curing units

Detalhes bibliográficos
Autor(a) principal: Santos, Maria Jacinta Moraes Coelho
Data de Publicação: 2010
Outros Autores: Passos, Sheila Pestana, Encarnação, Monalisa Olga Lessa da, Santos Junior, Gildo Coelho, Bottino, Marco Antonio
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/5930
Resumo: p. 110-115
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spelling Santos, Maria Jacinta Moraes CoelhoPassos, Sheila PestanaEncarnação, Monalisa Olga Lessa daSantos Junior, Gildo CoelhoBottino, Marco AntonioSantos, Maria Jacinta Moraes CoelhoPassos, Sheila PestanaEncarnação, Monalisa Olga Lessa daSantos Junior, Gildo CoelhoBottino, Marco Antonio2012-05-18T20:16:33Z2012-05-18T20:16:33Z2010-041678-7757http://www.repositorio.ufba.br/ri/handle/ri/5930v.18, n.2p. 110-115OBJECTIVE: This study evaluated the surface hardness of a resin cement (RelyX ARC) photoactivated through indirect composite resin (Cristobal) disks of different thicknesses using either a light-emitting diode (LED) or quartz tungsten halogen (QTH) light source. MATERIAL AND METHODS: Eighteen resin cement specimens were prepared and divided into 6 groups according to the type of curing unit and the thickness of resin disks interposed between the cement surface and light source. Three indentations (50 g for 15 s) were performed on the top and bottom surface of each specimen and a mean Vickers hardness number (VHN) was calculated for each specimen. The data were analyzed using two-way ANOVA and Tukey-Kramer test was used for post-hoc pairwise comparisons. RESULTS: Increased indirect resin disk thickness resulted in decreased mean VHN values. Mean VHN values for the top surfaces of the resin cement specimens ranged from 23.2 to 46.1 (QTH) and 32.3 to 41.7 (LED). The LED curing light source produced higher hardness values compared to the QTH light source for 2- and 3-mm-thick indirect resin disks. The differences were clinically, but not statistically significant. Increased indirect resin disk thickness also resulted in decreased mean VHN values for the bottom surfaces of the resin cement: 5.8 to 19.1 (QTH) and 7.5 to 32.0 (LED). For the bottom surfaces, a statistically significant interaction was also found between the type of curing light source and the indirect resin disk thickness. CONCLUSION: Mean surface hardness values of resin cement specimens decreased with the increase of indirect resin disk thickness. The LED curing light source generally produced higher surface hardness values.Submitted by Bruna Lessa (lessbruna@gmail.com) on 2012-05-18T20:16:33Z No. of bitstreams: 1 (29)a03v18n2.pdf: 61001 bytes, checksum: ff105c44abe866594a5b43ae74a5bd9a (MD5)Made available in DSpace on 2012-05-18T20:16:33Z (GMT). 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dc.title.pt_BR.fl_str_mv Hardening of a dual-cure resin cement using QTH and LED curing units
dc.title.alternative.pt_BR.fl_str_mv Journal of Applied Oral Science
title Hardening of a dual-cure resin cement using QTH and LED curing units
spellingShingle Hardening of a dual-cure resin cement using QTH and LED curing units
Santos, Maria Jacinta Moraes Coelho
Hardness
Cure
Resin cements
title_short Hardening of a dual-cure resin cement using QTH and LED curing units
title_full Hardening of a dual-cure resin cement using QTH and LED curing units
title_fullStr Hardening of a dual-cure resin cement using QTH and LED curing units
title_full_unstemmed Hardening of a dual-cure resin cement using QTH and LED curing units
title_sort Hardening of a dual-cure resin cement using QTH and LED curing units
author Santos, Maria Jacinta Moraes Coelho
author_facet Santos, Maria Jacinta Moraes Coelho
Passos, Sheila Pestana
Encarnação, Monalisa Olga Lessa da
Santos Junior, Gildo Coelho
Bottino, Marco Antonio
author_role author
author2 Passos, Sheila Pestana
Encarnação, Monalisa Olga Lessa da
Santos Junior, Gildo Coelho
Bottino, Marco Antonio
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Santos, Maria Jacinta Moraes Coelho
Passos, Sheila Pestana
Encarnação, Monalisa Olga Lessa da
Santos Junior, Gildo Coelho
Bottino, Marco Antonio
Santos, Maria Jacinta Moraes Coelho
Passos, Sheila Pestana
Encarnação, Monalisa Olga Lessa da
Santos Junior, Gildo Coelho
Bottino, Marco Antonio
dc.subject.por.fl_str_mv Hardness
Cure
Resin cements
topic Hardness
Cure
Resin cements
description p. 110-115
publishDate 2010
dc.date.issued.fl_str_mv 2010-04
dc.date.accessioned.fl_str_mv 2012-05-18T20:16:33Z
dc.date.available.fl_str_mv 2012-05-18T20:16:33Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/5930
dc.identifier.issn.none.fl_str_mv 1678-7757
dc.identifier.number.pt_BR.fl_str_mv v.18, n.2
identifier_str_mv 1678-7757
v.18, n.2
url http://www.repositorio.ufba.br/ri/handle/ri/5930
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Scielo
publisher.none.fl_str_mv Scielo
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dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
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