Post-curing conversion kinetics as functions of the irradiation time and increment thickness
Autor(a) principal: | |
---|---|
Data de Publicação: | 2013 |
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/80454 |
Resumo: | Objective: This study evaluated the variation of conversion degree (DC) in the 12 hours following initial photoactivation of a low-shrinkage composite resin (Venus Diamond). Material and Methods: The conversion degree was monitored for 12 hours using Attenuated Total Reflection (ATR) F-TIR Spectroscopy. The composite was placed in 1 or 2 mm rings and cured for 10 or 20 seconds with a LED lamp. ATR spectra were acquired from the bottom surface of each sample immediately after the initial photoactivation (P=0), 30 minutes (P=0.5) and 12 hours after photoactivation (P=12) in order to obtain the DC progression during the post-curing period. Interactions between thickness (T), irradiation time (I) and post-curing (P) on the DC were calculated through ANOVA testing. Results: All the first order interactions were statistically significant, with the exception of the T-P interaction. Furthermore, the shift from P=0 to P=0.5 had a statistically higher influence than the shift from P=0.5 to P=12. The post-curing period played a fundamental role in reaching higher DC values with the low-shrinkage composite resin tested in this study. Moreover, both the irradiation time and the composite thickness strongly influenced the DC. Conclusions: Increased irradiation time may be useful in obtaining a high conversion degree (DC) with a low-shrinkage nano-hybrid composite resin, particularly with 2 mm composite layers. |
id |
USP-17_eb322a082429a8def657c46e87f29af4 |
---|---|
oai_identifier_str |
oai:revistas.usp.br:article/80454 |
network_acronym_str |
USP-17 |
network_name_str |
Journal of applied oral science (Online) |
repository_id_str |
|
spelling |
Post-curing conversion kinetics as functions of the irradiation time and increment thickness Objective: This study evaluated the variation of conversion degree (DC) in the 12 hours following initial photoactivation of a low-shrinkage composite resin (Venus Diamond). Material and Methods: The conversion degree was monitored for 12 hours using Attenuated Total Reflection (ATR) F-TIR Spectroscopy. The composite was placed in 1 or 2 mm rings and cured for 10 or 20 seconds with a LED lamp. ATR spectra were acquired from the bottom surface of each sample immediately after the initial photoactivation (P=0), 30 minutes (P=0.5) and 12 hours after photoactivation (P=12) in order to obtain the DC progression during the post-curing period. Interactions between thickness (T), irradiation time (I) and post-curing (P) on the DC were calculated through ANOVA testing. Results: All the first order interactions were statistically significant, with the exception of the T-P interaction. Furthermore, the shift from P=0 to P=0.5 had a statistically higher influence than the shift from P=0.5 to P=12. The post-curing period played a fundamental role in reaching higher DC values with the low-shrinkage composite resin tested in this study. Moreover, both the irradiation time and the composite thickness strongly influenced the DC. Conclusions: Increased irradiation time may be useful in obtaining a high conversion degree (DC) with a low-shrinkage nano-hybrid composite resin, particularly with 2 mm composite layers. Universidade de São Paulo. Faculdade de Odontologia de Bauru2013-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/jaos/article/view/8045410.1590/1678-7757201302380Journal of Applied Oral Science; Vol. 21 No. 2 (2013); 190-195Journal of Applied Oral Science; Vol. 21 Núm. 2 (2013); 190-195Journal of Applied Oral Science; v. 21 n. 2 (2013); 190-1951678-77651678-7757reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/jaos/article/view/80454/84117Copyright (c) 2013 Journal of Applied Oral Scienceinfo:eu-repo/semantics/openAccessScotti, Nicola Venturello, Alberto Borga, Francesco Andrea Coero Pasqualini, Damiano Paolino, Davide Salvatore Geobaldo, Francesco Berutti, Elio 2014-05-08T12:31:56Zoai:revistas.usp.br:article/80454Revistahttp://www.scielo.br/jaosPUBhttps://www.revistas.usp.br/jaos/oai||jaos@usp.br1678-77651678-7757opendoar:2014-05-08T12:31:56Journal of applied oral science (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Post-curing conversion kinetics as functions of the irradiation time and increment thickness |
title |
Post-curing conversion kinetics as functions of the irradiation time and increment thickness |
spellingShingle |
Post-curing conversion kinetics as functions of the irradiation time and increment thickness Scotti, Nicola |
title_short |
Post-curing conversion kinetics as functions of the irradiation time and increment thickness |
title_full |
Post-curing conversion kinetics as functions of the irradiation time and increment thickness |
title_fullStr |
Post-curing conversion kinetics as functions of the irradiation time and increment thickness |
title_full_unstemmed |
Post-curing conversion kinetics as functions of the irradiation time and increment thickness |
title_sort |
Post-curing conversion kinetics as functions of the irradiation time and increment thickness |
author |
Scotti, Nicola |
author_facet |
Scotti, Nicola Venturello, Alberto Borga, Francesco Andrea Coero Pasqualini, Damiano Paolino, Davide Salvatore Geobaldo, Francesco Berutti, Elio |
author_role |
author |
author2 |
Venturello, Alberto Borga, Francesco Andrea Coero Pasqualini, Damiano Paolino, Davide Salvatore Geobaldo, Francesco Berutti, Elio |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Scotti, Nicola Venturello, Alberto Borga, Francesco Andrea Coero Pasqualini, Damiano Paolino, Davide Salvatore Geobaldo, Francesco Berutti, Elio |
description |
Objective: This study evaluated the variation of conversion degree (DC) in the 12 hours following initial photoactivation of a low-shrinkage composite resin (Venus Diamond). Material and Methods: The conversion degree was monitored for 12 hours using Attenuated Total Reflection (ATR) F-TIR Spectroscopy. The composite was placed in 1 or 2 mm rings and cured for 10 or 20 seconds with a LED lamp. ATR spectra were acquired from the bottom surface of each sample immediately after the initial photoactivation (P=0), 30 minutes (P=0.5) and 12 hours after photoactivation (P=12) in order to obtain the DC progression during the post-curing period. Interactions between thickness (T), irradiation time (I) and post-curing (P) on the DC were calculated through ANOVA testing. Results: All the first order interactions were statistically significant, with the exception of the T-P interaction. Furthermore, the shift from P=0 to P=0.5 had a statistically higher influence than the shift from P=0.5 to P=12. The post-curing period played a fundamental role in reaching higher DC values with the low-shrinkage composite resin tested in this study. Moreover, both the irradiation time and the composite thickness strongly influenced the DC. Conclusions: Increased irradiation time may be useful in obtaining a high conversion degree (DC) with a low-shrinkage nano-hybrid composite resin, particularly with 2 mm composite layers. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-04-01 |
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/80454 10.1590/1678-7757201302380 |
url |
https://www.revistas.usp.br/jaos/article/view/80454 |
identifier_str_mv |
10.1590/1678-7757201302380 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/jaos/article/view/80454/84117 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2013 Journal of Applied Oral Science info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2013 Journal of Applied Oral Science |
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. 21 No. 2 (2013); 190-195 Journal of Applied Oral Science; Vol. 21 Núm. 2 (2013); 190-195 Journal of Applied Oral Science; v. 21 n. 2 (2013); 190-195 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_ |
1800221670485524480 |