Influence of the distance of the curing light source and composite shade on hardness of two composites

Detalhes bibliográficos
Autor(a) principal: Thomé, Thaís
Data de Publicação: 2007
Outros Autores: Steagall Jr., Washington, Tachibana, Arlene, Braga, Sheila Regina Maia, Turbino, Miriam Lacalle
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of applied oral science (Online)
Texto Completo: https://www.revistas.usp.br/jaos/article/view/3517
Resumo: This study evaluated the influence of curing tip distance, shade and filler particle size on Vickers microhardness (VHN) of composite resins. Two composites were tested: Filtek Z250 microhybrid (3M ESPE; shades A1 and A3.5) and Filtek Supreme nanofilled (3M ESPE; shades A1B and A3.5B). For each resin, 42 specimens (5 mm in diameter and 2 mm height) were prepared being 21 for each shade. The specimens were exposed using a 20-second exposure to a quartz-tungsten-halogen light source with an irradiance of approximately 560 mW/cm², at the following distances: 0 mm (surface contact), 6 mm and 12 mm from composite surface. Effectiveness of cure of different resins, shades and curing distances was determined by measuring the top and bottom hardness (VHN) of specimens using a digital microhardness tester (load: 50 g; dwell time: 45 seconds) 24 hours following curing. The hardness ratio was calculated by dividing VHN of the bottom surface by VHN of top surface. Three-way ANOVA and Tukey's post-hoc test (p
id USP-17_4c1a48c36b75a46d949efa02320ce480
oai_identifier_str oai:revistas.usp.br:article/3517
network_acronym_str USP-17
network_name_str Journal of applied oral science (Online)
repository_id_str
spelling Influence of the distance of the curing light source and composite shade on hardness of two composites Hardness testsComposite resinsShades This study evaluated the influence of curing tip distance, shade and filler particle size on Vickers microhardness (VHN) of composite resins. Two composites were tested: Filtek Z250 microhybrid (3M ESPE; shades A1 and A3.5) and Filtek Supreme nanofilled (3M ESPE; shades A1B and A3.5B). For each resin, 42 specimens (5 mm in diameter and 2 mm height) were prepared being 21 for each shade. The specimens were exposed using a 20-second exposure to a quartz-tungsten-halogen light source with an irradiance of approximately 560 mW/cm², at the following distances: 0 mm (surface contact), 6 mm and 12 mm from composite surface. Effectiveness of cure of different resins, shades and curing distances was determined by measuring the top and bottom hardness (VHN) of specimens using a digital microhardness tester (load: 50 g; dwell time: 45 seconds) 24 hours following curing. The hardness ratio was calculated by dividing VHN of the bottom surface by VHN of top surface. Three-way ANOVA and Tukey's post-hoc test (pUniversidade de São Paulo. Faculdade de Odontologia de Bauru2007-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/jaos/article/view/351710.1590/S1678-77572007000600006Journal of Applied Oral Science; Vol. 15 No. 6 (2007); 486-491 Journal of Applied Oral Science; Vol. 15 Núm. 6 (2007); 486-491 Journal of Applied Oral Science; v. 15 n. 6 (2007); 486-491 1678-77651678-7757reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/jaos/article/view/3517/4207Copyright (c) 2007 Journal of Applied Oral Scienceinfo:eu-repo/semantics/openAccessThomé, ThaísSteagall Jr., WashingtonTachibana, ArleneBraga, Sheila Regina MaiaTurbino, Miriam Lacalle2012-04-27T11:59:16Zoai:revistas.usp.br:article/3517Revistahttp://www.scielo.br/jaosPUBhttps://www.revistas.usp.br/jaos/oai||jaos@usp.br1678-77651678-7757opendoar:2012-04-27T11:59:16Journal of applied oral science (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Influence of the distance of the curing light source and composite shade on hardness of two composites
title Influence of the distance of the curing light source and composite shade on hardness of two composites
spellingShingle Influence of the distance of the curing light source and composite shade on hardness of two composites
Thomé, Thaís
Hardness tests
Composite resins
Shades
title_short Influence of the distance of the curing light source and composite shade on hardness of two composites
title_full Influence of the distance of the curing light source and composite shade on hardness of two composites
title_fullStr Influence of the distance of the curing light source and composite shade on hardness of two composites
title_full_unstemmed Influence of the distance of the curing light source and composite shade on hardness of two composites
title_sort Influence of the distance of the curing light source and composite shade on hardness of two composites
author Thomé, Thaís
author_facet Thomé, Thaís
Steagall Jr., Washington
Tachibana, Arlene
Braga, Sheila Regina Maia
Turbino, Miriam Lacalle
author_role author
author2 Steagall Jr., Washington
Tachibana, Arlene
Braga, Sheila Regina Maia
Turbino, Miriam Lacalle
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Thomé, Thaís
Steagall Jr., Washington
Tachibana, Arlene
Braga, Sheila Regina Maia
Turbino, Miriam Lacalle
dc.subject.por.fl_str_mv Hardness tests
Composite resins
Shades
topic Hardness tests
Composite resins
Shades
description This study evaluated the influence of curing tip distance, shade and filler particle size on Vickers microhardness (VHN) of composite resins. Two composites were tested: Filtek Z250 microhybrid (3M ESPE; shades A1 and A3.5) and Filtek Supreme nanofilled (3M ESPE; shades A1B and A3.5B). For each resin, 42 specimens (5 mm in diameter and 2 mm height) were prepared being 21 for each shade. The specimens were exposed using a 20-second exposure to a quartz-tungsten-halogen light source with an irradiance of approximately 560 mW/cm², at the following distances: 0 mm (surface contact), 6 mm and 12 mm from composite surface. Effectiveness of cure of different resins, shades and curing distances was determined by measuring the top and bottom hardness (VHN) of specimens using a digital microhardness tester (load: 50 g; dwell time: 45 seconds) 24 hours following curing. The hardness ratio was calculated by dividing VHN of the bottom surface by VHN of top surface. Three-way ANOVA and Tukey's post-hoc test (p
publishDate 2007
dc.date.none.fl_str_mv 2007-12-01
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://www.revistas.usp.br/jaos/article/view/3517
10.1590/S1678-77572007000600006
url https://www.revistas.usp.br/jaos/article/view/3517
identifier_str_mv 10.1590/S1678-77572007000600006
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://www.revistas.usp.br/jaos/article/view/3517/4207
dc.rights.driver.fl_str_mv Copyright (c) 2007 Journal of Applied Oral Science
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2007 Journal of Applied Oral Science
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Odontologia de Bauru
publisher.none.fl_str_mv Universidade de São Paulo. Faculdade de Odontologia de Bauru
dc.source.none.fl_str_mv Journal of Applied Oral Science; Vol. 15 No. 6 (2007); 486-491
Journal of Applied Oral Science; Vol. 15 Núm. 6 (2007); 486-491
Journal of Applied Oral Science; v. 15 n. 6 (2007); 486-491
1678-7765
1678-7757
reponame:Journal of applied oral science (Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Journal of applied oral science (Online)
collection Journal of applied oral science (Online)
repository.name.fl_str_mv Journal of applied oral science (Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv ||jaos@usp.br
_version_ 1800221673525346304

Registros relacionados