Temperature rise and Knoop hardness promoted by different light-curing units

Detalhes bibliográficos
Autor(a) principal: Schneider, Luis Felipe J.
Data de Publicação: 2010
Outros Autores: de Moraes, Rafael R., Sinhoreti, Mário Alexandre C., Sobrinho, Lourenço C., Consani, Simonides
Tipo de documento: Artigo
Idioma: por
Título da fonte: Brazilian Dental Science
Texto Completo: https://ojs.ict.unesp.br/index.php/cob/article/view/167
Resumo: This study characterized the light emitted by a quartz-tungsten-halogen (QTH) and three light-emitting diode (LED) light curing units (LCUs) and investigated the temperature rise and composite hardness promoted by these sources. XL2500 QTH (3M ESPE), Freelight LED (3M ESPE), Ultrablue Is LED (DMC) and Cool Blue Wand LED (Milestone Scientific) were investigated. The irradiance was measured with a power meter, and the light spectral distribution obtained with a spectrometer. Temperature rise was recorded using a thermocouple connected to a digital thermometer during light-activation of Filtek Z250 (3M ESPE) resin composite. Data were submitted to ANOVA and Tukey’s test (α=0.05). Knoop hardness was assessed at different composite depths (20, 1000 and 1980μm), and data submitted to split-plot design two-way ANOVA and Tukey’s test (α=0.05). Correlation between irradiance and temperature rise was investigated by Pearson’s test. All units presented 95% of irradiance between 400-515nm. Temperature rise means (ºC) varied between 1.05}0.16 and 2.74}0.27. The Cool Blue LED presented significantly higher temperature increase than the other LCUs, and the QTH promoted significantly higher temperature rise than Ultrablue Is and Freelight LEDs. Significant relationship between irradiance and temperature increase was detected (r=0.867; p<0.001). Hardness means (kg/mm2) varied between 40.1}3.6 and 92.7}6.6. Samples activated by the Freelight LED presented significantly lower hardness than samples activated by the others units.
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spelling Temperature rise and Knoop hardness promoted by different light-curing unitsThis study characterized the light emitted by a quartz-tungsten-halogen (QTH) and three light-emitting diode (LED) light curing units (LCUs) and investigated the temperature rise and composite hardness promoted by these sources. XL2500 QTH (3M ESPE), Freelight LED (3M ESPE), Ultrablue Is LED (DMC) and Cool Blue Wand LED (Milestone Scientific) were investigated. The irradiance was measured with a power meter, and the light spectral distribution obtained with a spectrometer. Temperature rise was recorded using a thermocouple connected to a digital thermometer during light-activation of Filtek Z250 (3M ESPE) resin composite. Data were submitted to ANOVA and Tukey’s test (α=0.05). Knoop hardness was assessed at different composite depths (20, 1000 and 1980μm), and data submitted to split-plot design two-way ANOVA and Tukey’s test (α=0.05). Correlation between irradiance and temperature rise was investigated by Pearson’s test. All units presented 95% of irradiance between 400-515nm. Temperature rise means (ºC) varied between 1.05}0.16 and 2.74}0.27. The Cool Blue LED presented significantly higher temperature increase than the other LCUs, and the QTH promoted significantly higher temperature rise than Ultrablue Is and Freelight LEDs. Significant relationship between irradiance and temperature increase was detected (r=0.867; p<0.001). Hardness means (kg/mm2) varied between 40.1}3.6 and 92.7}6.6. Samples activated by the Freelight LED presented significantly lower hardness than samples activated by the others units. Institute of Science and Technology of São José dos Campos2010-08-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://ojs.ict.unesp.br/index.php/cob/article/view/16710.14295/bds.2008.v11i1.167Brazilian Dental Science; Vol. 11 No. 1 (2008)Brazilian Dental Science; v. 11 n. 1 (2008)2178-6011reponame:Brazilian Dental Scienceinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporhttps://ojs.ict.unesp.br/index.php/cob/article/view/167/117Schneider, Luis Felipe J.de Moraes, Rafael R.Sinhoreti, Mário Alexandre C.Sobrinho, Lourenço C.Consani, Simonidesinfo:eu-repo/semantics/openAccess2018-08-30T09:12:24Zoai:ojs.pkp.sfu.ca:article/167Revistahttp://bds.ict.unesp.br/PUBhttp://ojs.fosjc.unesp.br/index.php/index/oaisergio@fosjc.unesp.br||sergio@fosjc.unesp.br||bds.ict@unesp.br2178-60112178-6011opendoar:2018-08-30T09:12:24Brazilian Dental Science - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Temperature rise and Knoop hardness promoted by different light-curing units
title Temperature rise and Knoop hardness promoted by different light-curing units
spellingShingle Temperature rise and Knoop hardness promoted by different light-curing units
Schneider, Luis Felipe J.
title_short Temperature rise and Knoop hardness promoted by different light-curing units
title_full Temperature rise and Knoop hardness promoted by different light-curing units
title_fullStr Temperature rise and Knoop hardness promoted by different light-curing units
title_full_unstemmed Temperature rise and Knoop hardness promoted by different light-curing units
title_sort Temperature rise and Knoop hardness promoted by different light-curing units
author Schneider, Luis Felipe J.
author_facet Schneider, Luis Felipe J.
de Moraes, Rafael R.
Sinhoreti, Mário Alexandre C.
Sobrinho, Lourenço C.
Consani, Simonides
author_role author
author2 de Moraes, Rafael R.
Sinhoreti, Mário Alexandre C.
Sobrinho, Lourenço C.
Consani, Simonides
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Schneider, Luis Felipe J.
de Moraes, Rafael R.
Sinhoreti, Mário Alexandre C.
Sobrinho, Lourenço C.
Consani, Simonides
description This study characterized the light emitted by a quartz-tungsten-halogen (QTH) and three light-emitting diode (LED) light curing units (LCUs) and investigated the temperature rise and composite hardness promoted by these sources. XL2500 QTH (3M ESPE), Freelight LED (3M ESPE), Ultrablue Is LED (DMC) and Cool Blue Wand LED (Milestone Scientific) were investigated. The irradiance was measured with a power meter, and the light spectral distribution obtained with a spectrometer. Temperature rise was recorded using a thermocouple connected to a digital thermometer during light-activation of Filtek Z250 (3M ESPE) resin composite. Data were submitted to ANOVA and Tukey’s test (α=0.05). Knoop hardness was assessed at different composite depths (20, 1000 and 1980μm), and data submitted to split-plot design two-way ANOVA and Tukey’s test (α=0.05). Correlation between irradiance and temperature rise was investigated by Pearson’s test. All units presented 95% of irradiance between 400-515nm. Temperature rise means (ºC) varied between 1.05}0.16 and 2.74}0.27. The Cool Blue LED presented significantly higher temperature increase than the other LCUs, and the QTH promoted significantly higher temperature rise than Ultrablue Is and Freelight LEDs. Significant relationship between irradiance and temperature increase was detected (r=0.867; p<0.001). Hardness means (kg/mm2) varied between 40.1}3.6 and 92.7}6.6. Samples activated by the Freelight LED presented significantly lower hardness than samples activated by the others units.
publishDate 2010
dc.date.none.fl_str_mv 2010-08-09
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://ojs.ict.unesp.br/index.php/cob/article/view/167
10.14295/bds.2008.v11i1.167
url https://ojs.ict.unesp.br/index.php/cob/article/view/167
identifier_str_mv 10.14295/bds.2008.v11i1.167
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://ojs.ict.unesp.br/index.php/cob/article/view/167/117
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Institute of Science and Technology of São José dos Campos
publisher.none.fl_str_mv Institute of Science and Technology of São José dos Campos
dc.source.none.fl_str_mv Brazilian Dental Science; Vol. 11 No. 1 (2008)
Brazilian Dental Science; v. 11 n. 1 (2008)
2178-6011
reponame:Brazilian Dental Science
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Brazilian Dental Science
collection Brazilian Dental Science
repository.name.fl_str_mv Brazilian Dental Science - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv sergio@fosjc.unesp.br||sergio@fosjc.unesp.br||bds.ict@unesp.br
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