Effect of combining photoinitiators on cure efficiency of dental resin-based composites
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of applied oral science (Online) |
Texto Completo: | https://www.revistas.usp.br/jaos/article/view/189526 |
Resumo: | Camphorquinone is the most conventionally used photoinitiator in Dentistry. Although different alternative photoinitiators have been proposed, no photoinitiator was capable of completely substituting camphorquinone. The combination of photoinitiators has been considered the best alternative. Objectives: To evaluate the effect of combining Norrish type I and II photoinitiators on the cure efficiency of dental resin-based composites. Methodology: Experimental composites were produced containing different photoinitiator systems: Norrish type I-only, mono-alkyl phosphine oxide (TPO); Norrish type II-only, camphorquinone (CQ); or its combination, CQ and TPO, in a 1: 1 molar ratio. UV-vis absorption spectrophotometry was performed to assess the consumption of each photoinitiator after curing (n=3). A multi-wave LED (Bluephase® G2, Ivoclar Vivadent) was pre-characterized and used with a radiant exposure of 24 J/cm2. The degree of conversion was evaluated by Raman spectrometry, and the elution of the monomers by nuclear magnetic resonance analysis (n=3). Data were analyzed using ANOVA and Tukey's test (α=0.05; β=0.2). Results: The combination of CQ and TPO increased the consumption of the photoinitiator system compared to CQ-only (p=0.001), but presented similar consumption compared to TPO-only (p=0.52). There was no significant difference in the degree of conversion between the composites regardless of the photoinitiator system (p=0.81). However, the elution of the monomers was reduced when both photoinitiators were combined. TPO-based material presented the highest elution of monomers. Conclusions: The combination of the photoinitiator systems seems to be beneficial for the cure efficiency of dental resin-based composites. |
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oai:revistas.usp.br:article/189526 |
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USP-17 |
network_name_str |
Journal of applied oral science (Online) |
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Effect of combining photoinitiators on cure efficiency of dental resin-based compositesDental photoinitiatorsPolymerizationRaman spectroscopySpectrophotometryCamphorquinone is the most conventionally used photoinitiator in Dentistry. Although different alternative photoinitiators have been proposed, no photoinitiator was capable of completely substituting camphorquinone. The combination of photoinitiators has been considered the best alternative. Objectives: To evaluate the effect of combining Norrish type I and II photoinitiators on the cure efficiency of dental resin-based composites. Methodology: Experimental composites were produced containing different photoinitiator systems: Norrish type I-only, mono-alkyl phosphine oxide (TPO); Norrish type II-only, camphorquinone (CQ); or its combination, CQ and TPO, in a 1: 1 molar ratio. UV-vis absorption spectrophotometry was performed to assess the consumption of each photoinitiator after curing (n=3). A multi-wave LED (Bluephase® G2, Ivoclar Vivadent) was pre-characterized and used with a radiant exposure of 24 J/cm2. The degree of conversion was evaluated by Raman spectrometry, and the elution of the monomers by nuclear magnetic resonance analysis (n=3). Data were analyzed using ANOVA and Tukey's test (α=0.05; β=0.2). Results: The combination of CQ and TPO increased the consumption of the photoinitiator system compared to CQ-only (p=0.001), but presented similar consumption compared to TPO-only (p=0.52). There was no significant difference in the degree of conversion between the composites regardless of the photoinitiator system (p=0.81). However, the elution of the monomers was reduced when both photoinitiators were combined. TPO-based material presented the highest elution of monomers. Conclusions: The combination of the photoinitiator systems seems to be beneficial for the cure efficiency of dental resin-based composites.Universidade de São Paulo. Faculdade de Odontologia de Bauru2021-08-13info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/jaos/article/view/18952610.1590/1678-7757-2020-0467 Journal of Applied Oral Science; Vol. 29 (2021); e20200467Journal of Applied Oral Science; Vol. 29 (2021); e20200467Journal of Applied Oral Science; v. 29 (2021); e202004671678-77651678-7757reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/jaos/article/view/189526/175006Copyright (c) 2021 Journal of Applied Oral Sciencehttp://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessLara, LucasRocha, Mateus GarciaMenezes, Livia Rodrigues de Correr, Américo Bortolazzo Sinhoreti, Mario Alexandre Coelho Oliveira, Dayane 2021-08-13T12:26:39Zoai:revistas.usp.br:article/189526Revistahttp://www.scielo.br/jaosPUBhttps://www.revistas.usp.br/jaos/oai||jaos@usp.br1678-77651678-7757opendoar:2021-08-13T12:26:39Journal of applied oral science (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Effect of combining photoinitiators on cure efficiency of dental resin-based composites |
title |
Effect of combining photoinitiators on cure efficiency of dental resin-based composites |
spellingShingle |
Effect of combining photoinitiators on cure efficiency of dental resin-based composites Lara, Lucas Dental photoinitiators Polymerization Raman spectroscopy Spectrophotometry |
title_short |
Effect of combining photoinitiators on cure efficiency of dental resin-based composites |
title_full |
Effect of combining photoinitiators on cure efficiency of dental resin-based composites |
title_fullStr |
Effect of combining photoinitiators on cure efficiency of dental resin-based composites |
title_full_unstemmed |
Effect of combining photoinitiators on cure efficiency of dental resin-based composites |
title_sort |
Effect of combining photoinitiators on cure efficiency of dental resin-based composites |
author |
Lara, Lucas |
author_facet |
Lara, Lucas Rocha, Mateus Garcia Menezes, Livia Rodrigues de Correr, Américo Bortolazzo Sinhoreti, Mario Alexandre Coelho Oliveira, Dayane |
author_role |
author |
author2 |
Rocha, Mateus Garcia Menezes, Livia Rodrigues de Correr, Américo Bortolazzo Sinhoreti, Mario Alexandre Coelho Oliveira, Dayane |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Lara, Lucas Rocha, Mateus Garcia Menezes, Livia Rodrigues de Correr, Américo Bortolazzo Sinhoreti, Mario Alexandre Coelho Oliveira, Dayane |
dc.subject.por.fl_str_mv |
Dental photoinitiators Polymerization Raman spectroscopy Spectrophotometry |
topic |
Dental photoinitiators Polymerization Raman spectroscopy Spectrophotometry |
description |
Camphorquinone is the most conventionally used photoinitiator in Dentistry. Although different alternative photoinitiators have been proposed, no photoinitiator was capable of completely substituting camphorquinone. The combination of photoinitiators has been considered the best alternative. Objectives: To evaluate the effect of combining Norrish type I and II photoinitiators on the cure efficiency of dental resin-based composites. Methodology: Experimental composites were produced containing different photoinitiator systems: Norrish type I-only, mono-alkyl phosphine oxide (TPO); Norrish type II-only, camphorquinone (CQ); or its combination, CQ and TPO, in a 1: 1 molar ratio. UV-vis absorption spectrophotometry was performed to assess the consumption of each photoinitiator after curing (n=3). A multi-wave LED (Bluephase® G2, Ivoclar Vivadent) was pre-characterized and used with a radiant exposure of 24 J/cm2. The degree of conversion was evaluated by Raman spectrometry, and the elution of the monomers by nuclear magnetic resonance analysis (n=3). Data were analyzed using ANOVA and Tukey's test (α=0.05; β=0.2). Results: The combination of CQ and TPO increased the consumption of the photoinitiator system compared to CQ-only (p=0.001), but presented similar consumption compared to TPO-only (p=0.52). There was no significant difference in the degree of conversion between the composites regardless of the photoinitiator system (p=0.81). However, the elution of the monomers was reduced when both photoinitiators were combined. TPO-based material presented the highest elution of monomers. Conclusions: The combination of the photoinitiator systems seems to be beneficial for the cure efficiency of dental resin-based composites. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-08-13 |
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://www.revistas.usp.br/jaos/article/view/189526 10.1590/1678-7757-2020-0467 |
url |
https://www.revistas.usp.br/jaos/article/view/189526 |
identifier_str_mv |
10.1590/1678-7757-2020-0467 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/jaos/article/view/189526/175006 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2021 Journal of Applied Oral Science http://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2021 Journal of Applied Oral Science http://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo. Faculdade de Odontologia de Bauru |
publisher.none.fl_str_mv |
Universidade de São Paulo. Faculdade de Odontologia de Bauru |
dc.source.none.fl_str_mv |
Journal of Applied Oral Science; Vol. 29 (2021); e20200467 Journal of Applied Oral Science; Vol. 29 (2021); e20200467 Journal of Applied Oral Science; v. 29 (2021); e20200467 1678-7765 1678-7757 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_ |
1800221681923391488 |