Degree of conversion of nanofilled and microhybrid composite resins photo-activated by different generations of LEDs
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1678-77572012000200015 http://hdl.handle.net/11449/226858 |
Resumo: | Objective: This study aimed at evaluating the degree of conversion (DC) of four composite resins, being one nanofilled and 3 microhybrid resins, photo-activated with second-and third-generation light-emitting diodes (LEDs). Material and methods: FiltekTM Z350 nanofilled composite resins and Amelogen® Plus, Vit-l-escenceTM and Opallis microhybrid resins were photo-activated with two second-generation LEDs (Radii-cal and Elipar Free LightTM 2) and one third-generation LED (Ultra-Lume LED 5) by continuous light mode, and a quartz halogen-tungsten bulb (QHT, control). After 24 h of storage, the samples were pulverized into fine powder and 5 mg of each material were mixed with 100 mg of potassium bromide (KBr). After homogenization, they were pressed, which resulted in a pellet that was evaluated using an infrared spectromer (Nexus 470, Thermo Nicolet) equipped with TGS detector using diffuse reflectance (32 scans, resolution of 4 cm-1) coupled to a computer. The percentage of unreacted carbon-carbon double bonds (% C=C) was determined from the ratio of absorbance intensities of aliphatic C=C (peak at 1637 cm-1) against internal standard before and after curing of the specimen: aromatic C-C (peak at 1610 cm-1). Results: The ANOVA showed a significant effect on the interaction between the light-curing units (LCUs) and the composite resins (p<0.001). The Tukey's test showed that the nanofilled resin (FiltekTM Z350) and Opallis when photo-activated by the halogen lamp (QTH) had the lowest DC compared with the other microhybrid composite resins. The DC of the nanofilled resin (FiltekTM Z350) was also lower using LEDs. The highest degrees of conversion were obtained using the third-generation LED and one of second-generation LEDs (Elipar Free LightTM 2). Conclusions: The nanofilled resin showed the lowest DC, and the Vit-l-escenceTM microhybrid composite resin showed the highest DC. Among the LCUs, it was not possible to establish an order, even though the second-generation LED Radii-cal provided the lowest DC. |
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Degree of conversion of nanofilled and microhybrid composite resins photo-activated by different generations of LEDsComposite resinsFourier transform infrared spectroscopyLightNanotechnologyObjective: This study aimed at evaluating the degree of conversion (DC) of four composite resins, being one nanofilled and 3 microhybrid resins, photo-activated with second-and third-generation light-emitting diodes (LEDs). Material and methods: FiltekTM Z350 nanofilled composite resins and Amelogen® Plus, Vit-l-escenceTM and Opallis microhybrid resins were photo-activated with two second-generation LEDs (Radii-cal and Elipar Free LightTM 2) and one third-generation LED (Ultra-Lume LED 5) by continuous light mode, and a quartz halogen-tungsten bulb (QHT, control). After 24 h of storage, the samples were pulverized into fine powder and 5 mg of each material were mixed with 100 mg of potassium bromide (KBr). After homogenization, they were pressed, which resulted in a pellet that was evaluated using an infrared spectromer (Nexus 470, Thermo Nicolet) equipped with TGS detector using diffuse reflectance (32 scans, resolution of 4 cm-1) coupled to a computer. The percentage of unreacted carbon-carbon double bonds (% C=C) was determined from the ratio of absorbance intensities of aliphatic C=C (peak at 1637 cm-1) against internal standard before and after curing of the specimen: aromatic C-C (peak at 1610 cm-1). Results: The ANOVA showed a significant effect on the interaction between the light-curing units (LCUs) and the composite resins (p<0.001). The Tukey's test showed that the nanofilled resin (FiltekTM Z350) and Opallis when photo-activated by the halogen lamp (QTH) had the lowest DC compared with the other microhybrid composite resins. The DC of the nanofilled resin (FiltekTM Z350) was also lower using LEDs. The highest degrees of conversion were obtained using the third-generation LED and one of second-generation LEDs (Elipar Free LightTM 2). Conclusions: The nanofilled resin showed the lowest DC, and the Vit-l-escenceTM microhybrid composite resin showed the highest DC. Among the LCUs, it was not possible to establish an order, even though the second-generation LED Radii-cal provided the lowest DC.Federal University of Mato Grosso do Sul, Campo Grande, MSDepartment of Restorative Dentistry Araraquara School of Dentistry UNESP - Univ. Estadual Paulista, Araraquara, SPBiophotonics Laboratory Physics Institute of São Carlos University of São Paulo, São Carlos, SPDepartment of Restorative Dentistry Araraquara School of Dentistry UNESP - Univ. Estadual Paulista, Araraquara, SPFederal University of Mato Grosso do SulUniversidade Estadual Paulista (UNESP)Universidade de São Paulo (USP)Ribeiro, Benicia Carolina IaskievisczBoaventura, Juliana Maria Capelozza [UNESP]de Brito-Gonçalves, JoelRastelli, Alessandra Nara de Souza [UNESP]Bagnato, Vanderlei SalvadorSaad, José Roberto Cury [UNESP]2022-04-29T02:57:49Z2022-04-29T02:57:49Z2012-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article212-217http://dx.doi.org/10.1590/S1678-77572012000200015Journal of Applied Oral Science, v. 20, n. 2, p. 212-217, 2012.1678-77651678-7757http://hdl.handle.net/11449/22685810.1590/S1678-775720120002000152-s2.0-84862737159Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Applied Oral Scienceinfo:eu-repo/semantics/openAccess2022-04-29T02:57:49Zoai:repositorio.unesp.br:11449/226858Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:19:10.559623Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Degree of conversion of nanofilled and microhybrid composite resins photo-activated by different generations of LEDs |
title |
Degree of conversion of nanofilled and microhybrid composite resins photo-activated by different generations of LEDs |
spellingShingle |
Degree of conversion of nanofilled and microhybrid composite resins photo-activated by different generations of LEDs Ribeiro, Benicia Carolina Iaskieviscz Composite resins Fourier transform infrared spectroscopy Light Nanotechnology |
title_short |
Degree of conversion of nanofilled and microhybrid composite resins photo-activated by different generations of LEDs |
title_full |
Degree of conversion of nanofilled and microhybrid composite resins photo-activated by different generations of LEDs |
title_fullStr |
Degree of conversion of nanofilled and microhybrid composite resins photo-activated by different generations of LEDs |
title_full_unstemmed |
Degree of conversion of nanofilled and microhybrid composite resins photo-activated by different generations of LEDs |
title_sort |
Degree of conversion of nanofilled and microhybrid composite resins photo-activated by different generations of LEDs |
author |
Ribeiro, Benicia Carolina Iaskieviscz |
author_facet |
Ribeiro, Benicia Carolina Iaskieviscz Boaventura, Juliana Maria Capelozza [UNESP] de Brito-Gonçalves, Joel Rastelli, Alessandra Nara de Souza [UNESP] Bagnato, Vanderlei Salvador Saad, José Roberto Cury [UNESP] |
author_role |
author |
author2 |
Boaventura, Juliana Maria Capelozza [UNESP] de Brito-Gonçalves, Joel Rastelli, Alessandra Nara de Souza [UNESP] Bagnato, Vanderlei Salvador Saad, José Roberto Cury [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Federal University of Mato Grosso do Sul Universidade Estadual Paulista (UNESP) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Ribeiro, Benicia Carolina Iaskieviscz Boaventura, Juliana Maria Capelozza [UNESP] de Brito-Gonçalves, Joel Rastelli, Alessandra Nara de Souza [UNESP] Bagnato, Vanderlei Salvador Saad, José Roberto Cury [UNESP] |
dc.subject.por.fl_str_mv |
Composite resins Fourier transform infrared spectroscopy Light Nanotechnology |
topic |
Composite resins Fourier transform infrared spectroscopy Light Nanotechnology |
description |
Objective: This study aimed at evaluating the degree of conversion (DC) of four composite resins, being one nanofilled and 3 microhybrid resins, photo-activated with second-and third-generation light-emitting diodes (LEDs). Material and methods: FiltekTM Z350 nanofilled composite resins and Amelogen® Plus, Vit-l-escenceTM and Opallis microhybrid resins were photo-activated with two second-generation LEDs (Radii-cal and Elipar Free LightTM 2) and one third-generation LED (Ultra-Lume LED 5) by continuous light mode, and a quartz halogen-tungsten bulb (QHT, control). After 24 h of storage, the samples were pulverized into fine powder and 5 mg of each material were mixed with 100 mg of potassium bromide (KBr). After homogenization, they were pressed, which resulted in a pellet that was evaluated using an infrared spectromer (Nexus 470, Thermo Nicolet) equipped with TGS detector using diffuse reflectance (32 scans, resolution of 4 cm-1) coupled to a computer. The percentage of unreacted carbon-carbon double bonds (% C=C) was determined from the ratio of absorbance intensities of aliphatic C=C (peak at 1637 cm-1) against internal standard before and after curing of the specimen: aromatic C-C (peak at 1610 cm-1). Results: The ANOVA showed a significant effect on the interaction between the light-curing units (LCUs) and the composite resins (p<0.001). The Tukey's test showed that the nanofilled resin (FiltekTM Z350) and Opallis when photo-activated by the halogen lamp (QTH) had the lowest DC compared with the other microhybrid composite resins. The DC of the nanofilled resin (FiltekTM Z350) was also lower using LEDs. The highest degrees of conversion were obtained using the third-generation LED and one of second-generation LEDs (Elipar Free LightTM 2). Conclusions: The nanofilled resin showed the lowest DC, and the Vit-l-escenceTM microhybrid composite resin showed the highest DC. Among the LCUs, it was not possible to establish an order, even though the second-generation LED Radii-cal provided the lowest DC. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-01-01 2022-04-29T02:57:49Z 2022-04-29T02:57:49Z |
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/S1678-77572012000200015 Journal of Applied Oral Science, v. 20, n. 2, p. 212-217, 2012. 1678-7765 1678-7757 http://hdl.handle.net/11449/226858 10.1590/S1678-77572012000200015 2-s2.0-84862737159 |
url |
http://dx.doi.org/10.1590/S1678-77572012000200015 http://hdl.handle.net/11449/226858 |
identifier_str_mv |
Journal of Applied Oral Science, v. 20, n. 2, p. 212-217, 2012. 1678-7765 1678-7757 10.1590/S1678-77572012000200015 2-s2.0-84862737159 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Applied Oral Science |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
212-217 |
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 |
|
_version_ |
1808129051237285888 |