Influence of Light-Curing Intensity on Color Stability and Microhardness of Composite Resins
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.11607/prd.4437 http://hdl.handle.net/11449/196571 |
Resumo: | The purpose of this study was to evaluate the intensity of light-curing units and its relationship with the color stability and microhardness of composite resins with different shades subjected to a thermocycling procedure. Eighty blocks (5.0 x 2.0 mm) of TPH Spectrum composite resin (Dentsply Sirona) were produced and distributed into four groups according to the light-curing units (EC 450, ECEL, Valo, Ultradent) and color of the resin material (A3; C3) (n = 20). Within each group, color stability was measured on half the sample (n = 10) using a UV-2450 visible UV spectrophotometer (Shimadzu), and Knoop hardness was measured on the other half (n = 10) using an HMV 2000 microhardness tester (Shimadzu) before and after thermocycling (12,000 cycles, 5 degrees C and 55 degrees C). Mann-Whitney test was performed on the color stability data; the microhardness data were analyzed using a three-way analysis of variance (ANOVA) and Tukey test (alpha = .05). The ANOVA results showed that thermocycling, distinct light intensity, and different colors of resin materials influenced the microhardness of the composite resins, which was evidenced by the A3 composite resin light-cured with a Valo polywave showing higher hardness values. There was no statistical difference in the color stability of the A3 composite resin; however, the C3 composite resin light-cured with an EC 450 singlewave light-curing unit showed higher color alteration values. In general, the Valo polywave light-curing unit imparted better mechanical property and color stability to both shades of the composite resins. The different shades of resin material influenced the hardness of the composite resins. Therefore, the light intensity of the light-curing units should be evaluated and monitored, as the amount of light intensity will interfere in the quality and longevity of resin restorations. |
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Influence of Light-Curing Intensity on Color Stability and Microhardness of Composite ResinsThe purpose of this study was to evaluate the intensity of light-curing units and its relationship with the color stability and microhardness of composite resins with different shades subjected to a thermocycling procedure. Eighty blocks (5.0 x 2.0 mm) of TPH Spectrum composite resin (Dentsply Sirona) were produced and distributed into four groups according to the light-curing units (EC 450, ECEL, Valo, Ultradent) and color of the resin material (A3; C3) (n = 20). Within each group, color stability was measured on half the sample (n = 10) using a UV-2450 visible UV spectrophotometer (Shimadzu), and Knoop hardness was measured on the other half (n = 10) using an HMV 2000 microhardness tester (Shimadzu) before and after thermocycling (12,000 cycles, 5 degrees C and 55 degrees C). Mann-Whitney test was performed on the color stability data; the microhardness data were analyzed using a three-way analysis of variance (ANOVA) and Tukey test (alpha = .05). The ANOVA results showed that thermocycling, distinct light intensity, and different colors of resin materials influenced the microhardness of the composite resins, which was evidenced by the A3 composite resin light-cured with a Valo polywave showing higher hardness values. There was no statistical difference in the color stability of the A3 composite resin; however, the C3 composite resin light-cured with an EC 450 singlewave light-curing unit showed higher color alteration values. In general, the Valo polywave light-curing unit imparted better mechanical property and color stability to both shades of the composite resins. The different shades of resin material influenced the hardness of the composite resins. Therefore, the light intensity of the light-curing units should be evaluated and monitored, as the amount of light intensity will interfere in the quality and longevity of resin restorations.Sao Paulo State Univ UNESP, Dept Dent Mat & Prosthodont, Aracatuba Sch Dent, Aracatuba, SP, BrazilSao Paulo State Univ UNESP, Dept Dent Mat & Prosthodont, Aracatuba Sch Dent, Aracatuba, SP, BrazilQuintessence Publishing Co IncUniversidade Estadual Paulista (Unesp)Strazzi-Sahyon, Henrico Badaoui [UNESP]Rocha, Eduardo Passos [UNESP]Assuncao, Wirley Goncalves [UNESP]Santos, Paulo Henrique dos [UNESP]2020-12-10T19:49:11Z2020-12-10T19:49:11Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article129-134http://dx.doi.org/10.11607/prd.4437International Journal Of Periodontics & Restorative Dentistry. Hanover Park: Quintessence Publishing Co Inc, v. 40, n. 1, p. 129-134, 2020.0198-7569http://hdl.handle.net/11449/19657110.11607/prd.4437WOS:000512885200020Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengInternational Journal Of Periodontics & Restorative Dentistryinfo:eu-repo/semantics/openAccess2021-10-23T08:18:13Zoai:repositorio.unesp.br:11449/196571Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T08:18:13Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Influence of Light-Curing Intensity on Color Stability and Microhardness of Composite Resins |
title |
Influence of Light-Curing Intensity on Color Stability and Microhardness of Composite Resins |
spellingShingle |
Influence of Light-Curing Intensity on Color Stability and Microhardness of Composite Resins Strazzi-Sahyon, Henrico Badaoui [UNESP] |
title_short |
Influence of Light-Curing Intensity on Color Stability and Microhardness of Composite Resins |
title_full |
Influence of Light-Curing Intensity on Color Stability and Microhardness of Composite Resins |
title_fullStr |
Influence of Light-Curing Intensity on Color Stability and Microhardness of Composite Resins |
title_full_unstemmed |
Influence of Light-Curing Intensity on Color Stability and Microhardness of Composite Resins |
title_sort |
Influence of Light-Curing Intensity on Color Stability and Microhardness of Composite Resins |
author |
Strazzi-Sahyon, Henrico Badaoui [UNESP] |
author_facet |
Strazzi-Sahyon, Henrico Badaoui [UNESP] Rocha, Eduardo Passos [UNESP] Assuncao, Wirley Goncalves [UNESP] Santos, Paulo Henrique dos [UNESP] |
author_role |
author |
author2 |
Rocha, Eduardo Passos [UNESP] Assuncao, Wirley Goncalves [UNESP] Santos, Paulo Henrique dos [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Strazzi-Sahyon, Henrico Badaoui [UNESP] Rocha, Eduardo Passos [UNESP] Assuncao, Wirley Goncalves [UNESP] Santos, Paulo Henrique dos [UNESP] |
description |
The purpose of this study was to evaluate the intensity of light-curing units and its relationship with the color stability and microhardness of composite resins with different shades subjected to a thermocycling procedure. Eighty blocks (5.0 x 2.0 mm) of TPH Spectrum composite resin (Dentsply Sirona) were produced and distributed into four groups according to the light-curing units (EC 450, ECEL, Valo, Ultradent) and color of the resin material (A3; C3) (n = 20). Within each group, color stability was measured on half the sample (n = 10) using a UV-2450 visible UV spectrophotometer (Shimadzu), and Knoop hardness was measured on the other half (n = 10) using an HMV 2000 microhardness tester (Shimadzu) before and after thermocycling (12,000 cycles, 5 degrees C and 55 degrees C). Mann-Whitney test was performed on the color stability data; the microhardness data were analyzed using a three-way analysis of variance (ANOVA) and Tukey test (alpha = .05). The ANOVA results showed that thermocycling, distinct light intensity, and different colors of resin materials influenced the microhardness of the composite resins, which was evidenced by the A3 composite resin light-cured with a Valo polywave showing higher hardness values. There was no statistical difference in the color stability of the A3 composite resin; however, the C3 composite resin light-cured with an EC 450 singlewave light-curing unit showed higher color alteration values. In general, the Valo polywave light-curing unit imparted better mechanical property and color stability to both shades of the composite resins. The different shades of resin material influenced the hardness of the composite resins. Therefore, the light intensity of the light-curing units should be evaluated and monitored, as the amount of light intensity will interfere in the quality and longevity of resin restorations. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-10T19:49:11Z 2020-12-10T19:49:11Z 2020-01-01 |
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/10.11607/prd.4437 International Journal Of Periodontics & Restorative Dentistry. Hanover Park: Quintessence Publishing Co Inc, v. 40, n. 1, p. 129-134, 2020. 0198-7569 http://hdl.handle.net/11449/196571 10.11607/prd.4437 WOS:000512885200020 |
url |
http://dx.doi.org/10.11607/prd.4437 http://hdl.handle.net/11449/196571 |
identifier_str_mv |
International Journal Of Periodontics & Restorative Dentistry. Hanover Park: Quintessence Publishing Co Inc, v. 40, n. 1, p. 129-134, 2020. 0198-7569 10.11607/prd.4437 WOS:000512885200020 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
International Journal Of Periodontics & Restorative Dentistry |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
129-134 |
dc.publisher.none.fl_str_mv |
Quintessence Publishing Co Inc |
publisher.none.fl_str_mv |
Quintessence Publishing Co Inc |
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_ |
1799965503934955520 |