Post-curing conversion kinetics as functions of the irradiation time and increment thickness
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of applied oral science (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572013000200190 |
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. |
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oai:scielo:S1678-77572013000200190 |
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USP-17 |
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Journal of applied oral science (Online) |
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Post-curing conversion kinetics as functions of the irradiation time and increment thicknessPost-curingThicknessIrradiation timeLEDLow-shrinkage composite 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. Faculdade De Odontologia De Bauru - USP2013-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572013000200190Journal of Applied Oral Science v.21 n.2 2013reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/1678-7757201302380info:eu-repo/semantics/openAccessScotti,NicolaVenturello,AlbertoBorga,Francesco Andrea CoeroPasqualini,DamianoPaolino,Davide SalvatoreGeobaldo,FrancescoBerutti,Elioeng2013-10-08T00:00:00Zoai:scielo:S1678-77572013000200190Revistahttp://www.scielo.br/jaosPUBhttps://old.scielo.br/oai/scielo-oai.php||jaos@usp.br1678-77651678-7757opendoar:2013-10-08T00:00Journal 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 Post-curing Thickness Irradiation time LED Low-shrinkage composite |
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 |
dc.subject.por.fl_str_mv |
Post-curing Thickness Irradiation time LED Low-shrinkage composite |
topic |
Post-curing Thickness Irradiation time LED Low-shrinkage composite |
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 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572013000200190 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572013000200190 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1678-7757201302380 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Faculdade De Odontologia De Bauru - USP |
publisher.none.fl_str_mv |
Faculdade De Odontologia De Bauru - USP |
dc.source.none.fl_str_mv |
Journal of Applied Oral Science v.21 n.2 2013 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_ |
1748936437596684288 |