Evaluation of mechanical properties of Z250 composite resin light-cured by different methods

Detalhes bibliográficos
Autor(a) principal: Obici,Andresa Carla
Data de Publicação: 2005
Outros Autores: Sinhoreti,Mário Alexandre Coelho, Correr-Sobrinho,Lourenço, Góes,Mário Fernando de, Consani,Simonides
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of applied oral science (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572005000400015
Resumo: This study evaluated some mechanical parameters of Z250 composite resin using different light-curing methods. Ten specimens were prepared for each mechanical test group with different dimensions according to the test. Light-curing was performed by: a). continuous light (800mW/cm²-40s); b). exponential light (0-800mW/cm²-40s); c). intermittent light (2s-600mW/cm²; 2s without light-80s); d). stepped light (10s-150mW/cm²; 30s-650mW/cm²); e). PAC (1320mW/cm²-3s); f). LED (350mW/cm²-40s). After 24 ± 1 h, the specimens were loaded at a crosshead speed of 0.5 mm/min until fracture. The mechanical properties were calculated and analyzed by ANOVA and Tukey test (5%). The results showed that the highest compressive strength values were found for the continuous, exponential, intermittent and stepped light methods, whereas PAC and LED obtained the lowest values. LED, stepped light, PAC, exponential and continuous light presented the highest values for diametral tensile strength. The intermittent light showed the lowest value, which was significantly lower than the value obtained for LED only. Flexural strength results were not significantly different between all light-curing methods. Finally, the highest modulus of elasticity values were obtained for LED, exponential, continuous and intermittent light, whereas PAC and stepped light showed the lowest values. The mechanical properties were affected by light-curing methods employed.
id USP-17_3933855bdb4d817ad1962a8434e14d87
oai_identifier_str oai:scielo:S1678-77572005000400015
network_acronym_str USP-17
network_name_str Journal of applied oral science (Online)
repository_id_str
spelling Evaluation of mechanical properties of Z250 composite resin light-cured by different methodsComposite resinsLight-curing methodsCompressive strengthDiametral tensile strengthFlexural strengthModulus of elasticityThis study evaluated some mechanical parameters of Z250 composite resin using different light-curing methods. Ten specimens were prepared for each mechanical test group with different dimensions according to the test. Light-curing was performed by: a). continuous light (800mW/cm²-40s); b). exponential light (0-800mW/cm²-40s); c). intermittent light (2s-600mW/cm²; 2s without light-80s); d). stepped light (10s-150mW/cm²; 30s-650mW/cm²); e). PAC (1320mW/cm²-3s); f). LED (350mW/cm²-40s). After 24 ± 1 h, the specimens were loaded at a crosshead speed of 0.5 mm/min until fracture. The mechanical properties were calculated and analyzed by ANOVA and Tukey test (5%). The results showed that the highest compressive strength values were found for the continuous, exponential, intermittent and stepped light methods, whereas PAC and LED obtained the lowest values. LED, stepped light, PAC, exponential and continuous light presented the highest values for diametral tensile strength. The intermittent light showed the lowest value, which was significantly lower than the value obtained for LED only. Flexural strength results were not significantly different between all light-curing methods. Finally, the highest modulus of elasticity values were obtained for LED, exponential, continuous and intermittent light, whereas PAC and stepped light showed the lowest values. The mechanical properties were affected by light-curing methods employed.Faculdade De Odontologia De Bauru - USP2005-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572005000400015Journal of Applied Oral Science v.13 n.4 2005reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S1678-77572005000400015info:eu-repo/semantics/openAccessObici,Andresa CarlaSinhoreti,Mário Alexandre CoelhoCorrer-Sobrinho,LourençoGóes,Mário Fernando deConsani,Simonideseng2006-01-20T00:00:00Zoai:scielo:S1678-77572005000400015Revistahttp://www.scielo.br/jaosPUBhttps://old.scielo.br/oai/scielo-oai.php||jaos@usp.br1678-77651678-7757opendoar:2006-01-20T00:00Journal of applied oral science (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Evaluation of mechanical properties of Z250 composite resin light-cured by different methods
title Evaluation of mechanical properties of Z250 composite resin light-cured by different methods
spellingShingle Evaluation of mechanical properties of Z250 composite resin light-cured by different methods
Obici,Andresa Carla
Composite resins
Light-curing methods
Compressive strength
Diametral tensile strength
Flexural strength
Modulus of elasticity
title_short Evaluation of mechanical properties of Z250 composite resin light-cured by different methods
title_full Evaluation of mechanical properties of Z250 composite resin light-cured by different methods
title_fullStr Evaluation of mechanical properties of Z250 composite resin light-cured by different methods
title_full_unstemmed Evaluation of mechanical properties of Z250 composite resin light-cured by different methods
title_sort Evaluation of mechanical properties of Z250 composite resin light-cured by different methods
author Obici,Andresa Carla
author_facet Obici,Andresa Carla
Sinhoreti,Mário Alexandre Coelho
Correr-Sobrinho,Lourenço
Góes,Mário Fernando de
Consani,Simonides
author_role author
author2 Sinhoreti,Mário Alexandre Coelho
Correr-Sobrinho,Lourenço
Góes,Mário Fernando de
Consani,Simonides
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Obici,Andresa Carla
Sinhoreti,Mário Alexandre Coelho
Correr-Sobrinho,Lourenço
Góes,Mário Fernando de
Consani,Simonides
dc.subject.por.fl_str_mv Composite resins
Light-curing methods
Compressive strength
Diametral tensile strength
Flexural strength
Modulus of elasticity
topic Composite resins
Light-curing methods
Compressive strength
Diametral tensile strength
Flexural strength
Modulus of elasticity
description This study evaluated some mechanical parameters of Z250 composite resin using different light-curing methods. Ten specimens were prepared for each mechanical test group with different dimensions according to the test. Light-curing was performed by: a). continuous light (800mW/cm²-40s); b). exponential light (0-800mW/cm²-40s); c). intermittent light (2s-600mW/cm²; 2s without light-80s); d). stepped light (10s-150mW/cm²; 30s-650mW/cm²); e). PAC (1320mW/cm²-3s); f). LED (350mW/cm²-40s). After 24 ± 1 h, the specimens were loaded at a crosshead speed of 0.5 mm/min until fracture. The mechanical properties were calculated and analyzed by ANOVA and Tukey test (5%). The results showed that the highest compressive strength values were found for the continuous, exponential, intermittent and stepped light methods, whereas PAC and LED obtained the lowest values. LED, stepped light, PAC, exponential and continuous light presented the highest values for diametral tensile strength. The intermittent light showed the lowest value, which was significantly lower than the value obtained for LED only. Flexural strength results were not significantly different between all light-curing methods. Finally, the highest modulus of elasticity values were obtained for LED, exponential, continuous and intermittent light, whereas PAC and stepped light showed the lowest values. The mechanical properties were affected by light-curing methods employed.
publishDate 2005
dc.date.none.fl_str_mv 2005-12-01
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=S1678-77572005000400015
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572005000400015
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1678-77572005000400015
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 Faculdade De Odontologia De Bauru - USP
publisher.none.fl_str_mv Faculdade De Odontologia De Bauru - USP
dc.source.none.fl_str_mv Journal of Applied Oral Science v.13 n.4 2005
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_ 1748936433951834112