Influence of light curing source on microhardness of composite resins of different shades
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1678-77572006000100003 http://hdl.handle.net/11449/68728 |
Resumo: | Introduction: The evolution of light curing units can be noticed by the different systems recently introduced. The technology of LED units promises longer lifetime, without heating and with production of specific light for activation of camphorquinone. However, further studies are still required to check the real curing effectiveness of these units. Purpose: This study evaluated the microhardness of 4 shades (B-0.5, B-1, B-2 and B-3) of composite resin Filtek Z-250 (3M ESPE) after light curing with 4 light sources, being one halogen (Ultralux - Dabi Atlante) and three LED (Ultraled - Dabi Atlante, Ultrablue - DMC and Elipar Freelight - 3M ESPE). Methods: 192 specimens were distributed into 16 groups, and materials were inserted in a single increment in cylindrical templates measuring 4mm x 4mm and light cured as recommended by the manufacturer. Then, they were submitted to microhardness test on the top and bottom aspects of the cylinders. Results: The hardness values achieved were submitted to analysis of variance and to Tukey test at 5% confidence level. It was observed that microhardness of specimens varied according to the shade of the material and light sources employed. The LED appliance emitting greater light intensity provided the highest hardness values with shade B-0.5, allowing the best curing. On the other hand, appliances with low light intensity were the least effective. It was also observed that the bottom of specimens was more sensitive to changes in shade. Conclusion: Light intensity of LED light curing units is fundamental for their good functioning, especially when applied in resins with darker shades. |
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Influence of light curing source on microhardness of composite resins of different shadesComposite resinsCuring equipmentMicrohardnessShadesIntroduction: The evolution of light curing units can be noticed by the different systems recently introduced. The technology of LED units promises longer lifetime, without heating and with production of specific light for activation of camphorquinone. However, further studies are still required to check the real curing effectiveness of these units. Purpose: This study evaluated the microhardness of 4 shades (B-0.5, B-1, B-2 and B-3) of composite resin Filtek Z-250 (3M ESPE) after light curing with 4 light sources, being one halogen (Ultralux - Dabi Atlante) and three LED (Ultraled - Dabi Atlante, Ultrablue - DMC and Elipar Freelight - 3M ESPE). Methods: 192 specimens were distributed into 16 groups, and materials were inserted in a single increment in cylindrical templates measuring 4mm x 4mm and light cured as recommended by the manufacturer. Then, they were submitted to microhardness test on the top and bottom aspects of the cylinders. Results: The hardness values achieved were submitted to analysis of variance and to Tukey test at 5% confidence level. It was observed that microhardness of specimens varied according to the shade of the material and light sources employed. The LED appliance emitting greater light intensity provided the highest hardness values with shade B-0.5, allowing the best curing. On the other hand, appliances with low light intensity were the least effective. It was also observed that the bottom of specimens was more sensitive to changes in shade. Conclusion: Light intensity of LED light curing units is fundamental for their good functioning, especially when applied in resins with darker shades.Department of Restorative Dentistry of Araçatuba Dental School State University of São Paulo UNESP, AraçatubaAraçatuba Dental School UNESPDepartment of Restorative Dentistry UNESP, R. José Bonifácio 1193, Cep.: 16015 050, Aracatuba, SPDepartment of Restorative Dentistry of Araçatuba Dental School State University of São Paulo UNESP, AraçatubaAraçatuba Dental School UNESPDepartment of Restorative Dentistry UNESP, R. José Bonifácio 1193, Cep.: 16015 050, Aracatuba, SPUniversidade Estadual Paulista (Unesp)Briso, André Luiz Fraga [UNESP]Fedel, Tânia Maria [UNESP]Pereira, Sibéria de Morais [UNESP]Mauro, Silvio José [UNESP]Sundfeld, Renato Herman [UNESP]Sundefeld, Maria Lúcia Marçal Mazza [UNESP]2014-05-27T11:21:47Z2014-05-27T11:21:47Z2006-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10-15application/pdfhttp://dx.doi.org/10.1590/S1678-77572006000100003Journal of Applied Oral Science, v. 14, n. 1, p. 10-15, 2006.1678-77571678-7765http://hdl.handle.net/11449/6872810.1590/S1678-77572006000100003S1678-775720060001000032-s2.0-336458721302-s2.0-33645872130.pdf576195646723470296801828542066239693348671473011Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Applied Oral Science1.7090,645info:eu-repo/semantics/openAccess2024-01-10T06:23:13Zoai:repositorio.unesp.br:11449/68728Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-01-10T06:23:13Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Influence of light curing source on microhardness of composite resins of different shades |
title |
Influence of light curing source on microhardness of composite resins of different shades |
spellingShingle |
Influence of light curing source on microhardness of composite resins of different shades Briso, André Luiz Fraga [UNESP] Composite resins Curing equipment Microhardness Shades |
title_short |
Influence of light curing source on microhardness of composite resins of different shades |
title_full |
Influence of light curing source on microhardness of composite resins of different shades |
title_fullStr |
Influence of light curing source on microhardness of composite resins of different shades |
title_full_unstemmed |
Influence of light curing source on microhardness of composite resins of different shades |
title_sort |
Influence of light curing source on microhardness of composite resins of different shades |
author |
Briso, André Luiz Fraga [UNESP] |
author_facet |
Briso, André Luiz Fraga [UNESP] Fedel, Tânia Maria [UNESP] Pereira, Sibéria de Morais [UNESP] Mauro, Silvio José [UNESP] Sundfeld, Renato Herman [UNESP] Sundefeld, Maria Lúcia Marçal Mazza [UNESP] |
author_role |
author |
author2 |
Fedel, Tânia Maria [UNESP] Pereira, Sibéria de Morais [UNESP] Mauro, Silvio José [UNESP] Sundfeld, Renato Herman [UNESP] Sundefeld, Maria Lúcia Marçal Mazza [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Briso, André Luiz Fraga [UNESP] Fedel, Tânia Maria [UNESP] Pereira, Sibéria de Morais [UNESP] Mauro, Silvio José [UNESP] Sundfeld, Renato Herman [UNESP] Sundefeld, Maria Lúcia Marçal Mazza [UNESP] |
dc.subject.por.fl_str_mv |
Composite resins Curing equipment Microhardness Shades |
topic |
Composite resins Curing equipment Microhardness Shades |
description |
Introduction: The evolution of light curing units can be noticed by the different systems recently introduced. The technology of LED units promises longer lifetime, without heating and with production of specific light for activation of camphorquinone. However, further studies are still required to check the real curing effectiveness of these units. Purpose: This study evaluated the microhardness of 4 shades (B-0.5, B-1, B-2 and B-3) of composite resin Filtek Z-250 (3M ESPE) after light curing with 4 light sources, being one halogen (Ultralux - Dabi Atlante) and three LED (Ultraled - Dabi Atlante, Ultrablue - DMC and Elipar Freelight - 3M ESPE). Methods: 192 specimens were distributed into 16 groups, and materials were inserted in a single increment in cylindrical templates measuring 4mm x 4mm and light cured as recommended by the manufacturer. Then, they were submitted to microhardness test on the top and bottom aspects of the cylinders. Results: The hardness values achieved were submitted to analysis of variance and to Tukey test at 5% confidence level. It was observed that microhardness of specimens varied according to the shade of the material and light sources employed. The LED appliance emitting greater light intensity provided the highest hardness values with shade B-0.5, allowing the best curing. On the other hand, appliances with low light intensity were the least effective. It was also observed that the bottom of specimens was more sensitive to changes in shade. Conclusion: Light intensity of LED light curing units is fundamental for their good functioning, especially when applied in resins with darker shades. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-01-01 2014-05-27T11:21:47Z 2014-05-27T11:21:47Z |
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/S1678-77572006000100003 Journal of Applied Oral Science, v. 14, n. 1, p. 10-15, 2006. 1678-7757 1678-7765 http://hdl.handle.net/11449/68728 10.1590/S1678-77572006000100003 S1678-77572006000100003 2-s2.0-33645872130 2-s2.0-33645872130.pdf 5761956467234702 9680182854206623 9693348671473011 |
url |
http://dx.doi.org/10.1590/S1678-77572006000100003 http://hdl.handle.net/11449/68728 |
identifier_str_mv |
Journal of Applied Oral Science, v. 14, n. 1, p. 10-15, 2006. 1678-7757 1678-7765 10.1590/S1678-77572006000100003 S1678-77572006000100003 2-s2.0-33645872130 2-s2.0-33645872130.pdf 5761956467234702 9680182854206623 9693348671473011 |
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 |
10-15 application/pdf |
dc.source.none.fl_str_mv |
Scopus 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 |
|
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1797790251989598208 |