Hardening of a dual-cure resin cement using QTH and LED curing units
Autor(a) principal: | |
---|---|
Data de Publicação: | 2010 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1678-77572010000200003 http://hdl.handle.net/11449/22838 |
Resumo: | Objective: 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. Conclusions: 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. |
id |
UNSP_fa47b04e05854e427acfe599df8b3d6c |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/22838 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Hardening of a dual-cure resin cement using QTH and LED curing unitsHardnessCureResin cementsObjective: 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. Conclusions: 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.Univ Western Ontario, Dept Restorat Dent, London, on N6A 3K7, CanadaSão Paulo State Univ, Sao Jose dos Campos Dent Sch, Dept Dent Mat & Prosthodont, Sao Jose Dos Campos, BrazilUniversidade Federal da Bahia (UFBA), Sch Dent, Dept Dent Mat & Prosthodont, Salvador, BA, BrazilSão Paulo State Univ, Sao Jose dos Campos Dent Sch, Dept Dent Mat & Prosthodont, Sao Jose Dos Campos, BrazilUniversidade de São Paulo (USP), Faculdade de Odontologia de BauruUniv Western OntarioUniversidade Estadual Paulista (Unesp)Universidade Federal da Bahia (UFBA)Moraes Coelho Santos, Maria JacintaPassos, Sheila Pestana [UNESP]Lessa da Encarnacao, Monalisa OlgaSantos Junior, Gildo CoelhoBottino, Marco Antonio [UNESP]2014-05-20T14:05:07Z2014-05-20T14:05:07Z2010-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article110-115application/pdfhttp://dx.doi.org/10.1590/S1678-77572010000200003Journal of Applied Oral Science. Bauru-sp: Univ São Paulo Fac Odontologia Bauru, v. 18, n. 2, p. 110-115, 2010.1678-7757http://hdl.handle.net/11449/22838S1678-77572010000200003WOS:000277832000003S1678-77572010000200003.pdf9234456003563666Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Applied Oral Science1.7090,645info:eu-repo/semantics/openAccess2023-10-04T06:07:10Zoai:repositorio.unesp.br:11449/22838Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:00:33.966395Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Hardening of a dual-cure resin cement using QTH and LED curing units |
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 Moraes Coelho Santos, Maria Jacinta 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 |
Moraes Coelho Santos, Maria Jacinta |
author_facet |
Moraes Coelho Santos, Maria Jacinta Passos, Sheila Pestana [UNESP] Lessa da Encarnacao, Monalisa Olga Santos Junior, Gildo Coelho Bottino, Marco Antonio [UNESP] |
author_role |
author |
author2 |
Passos, Sheila Pestana [UNESP] Lessa da Encarnacao, Monalisa Olga Santos Junior, Gildo Coelho Bottino, Marco Antonio [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Univ Western Ontario Universidade Estadual Paulista (Unesp) Universidade Federal da Bahia (UFBA) |
dc.contributor.author.fl_str_mv |
Moraes Coelho Santos, Maria Jacinta Passos, Sheila Pestana [UNESP] Lessa da Encarnacao, Monalisa Olga Santos Junior, Gildo Coelho Bottino, Marco Antonio [UNESP] |
dc.subject.por.fl_str_mv |
Hardness Cure Resin cements |
topic |
Hardness Cure Resin cements |
description |
Objective: 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. Conclusions: 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. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-03-01 2014-05-20T14:05:07Z 2014-05-20T14:05:07Z |
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://dx.doi.org/10.1590/S1678-77572010000200003 Journal of Applied Oral Science. Bauru-sp: Univ São Paulo Fac Odontologia Bauru, v. 18, n. 2, p. 110-115, 2010. 1678-7757 http://hdl.handle.net/11449/22838 S1678-77572010000200003 WOS:000277832000003 S1678-77572010000200003.pdf 9234456003563666 |
url |
http://dx.doi.org/10.1590/S1678-77572010000200003 http://hdl.handle.net/11449/22838 |
identifier_str_mv |
Journal of Applied Oral Science. Bauru-sp: Univ São Paulo Fac Odontologia Bauru, v. 18, n. 2, p. 110-115, 2010. 1678-7757 S1678-77572010000200003 WOS:000277832000003 S1678-77572010000200003.pdf 9234456003563666 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Applied Oral Science 1.709 0,645 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
110-115 application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo (USP), Faculdade de Odontologia de Bauru |
publisher.none.fl_str_mv |
Universidade de São Paulo (USP), Faculdade de Odontologia de Bauru |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128302922072064 |