Influence of the photoinitiator system and light photoactivation units on the degree of conversion of dental composites

Influence of the photoinitiator system and light photoactivation units on the degree of conversion of dental composites

The aim of this study was to observe the influence of two light polymerization units (LED or halogen light) on the degree of conversion (DC) of three dental composites with lighter shades and a different photoinitiator system. The top (T) and bottom (B) surfaces of 60 discs of composite resin (Filtek™ Supreme, Filtek™ Z250, Tetric™ Ceram Bleach) cured either by LED or by halogen lamp (HL) were studied using an FT-Raman spectrometer. The degree of conversion (DC) was evaluated by following the changes in the intensity of the methacrylate C=C stretching mode at 1640 cm-1. The calculated DC ranged from 54.2% (B) to 73.4% (T) and from 60.2% (B) to 76.6% (T) for the LED and HL, respectively. LED and halogen devices were able to produce an adequate DC for all the resins tested.

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Main Authors: Porto,Isabel Cristina Celerino de Moraes, Soares,Luis Eduardo Silva, Martin,Airton Abrahão, Cavalli,Vanessa, Liporoni,Priscila Christiane Suzy
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Pesquisa Odontológica - SBPqO 2010
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242010000400017
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spelling oai:scielo:S1806-832420100004000172010-12-16Influence of the photoinitiator system and light photoactivation units on the degree of conversion of dental compositesPorto,Isabel Cristina Celerino de MoraesSoares,Luis Eduardo SilvaMartin,Airton AbrahãoCavalli,VanessaLiporoni,Priscila Christiane Suzy Composite Resins Dental Equipment Curing Lights/Dental The aim of this study was to observe the influence of two light polymerization units (LED or halogen light) on the degree of conversion (DC) of three dental composites with lighter shades and a different photoinitiator system. The top (T) and bottom (B) surfaces of 60 discs of composite resin (Filtek™ Supreme, Filtek™ Z250, Tetric™ Ceram Bleach) cured either by LED or by halogen lamp (HL) were studied using an FT-Raman spectrometer. The degree of conversion (DC) was evaluated by following the changes in the intensity of the methacrylate C=C stretching mode at 1640 cm-1. The calculated DC ranged from 54.2% (B) to 73.4% (T) and from 60.2% (B) to 76.6% (T) for the LED and HL, respectively. LED and halogen devices were able to produce an adequate DC for all the resins tested.info:eu-repo/semantics/openAccessSociedade Brasileira de Pesquisa Odontológica - SBPqOBrazilian Oral Research v.24 n.4 20102010-12-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242010000400017en10.1590/S1806-83242010000400017
institution SCIELO
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author Porto,Isabel Cristina Celerino de Moraes
Soares,Luis Eduardo Silva
Martin,Airton Abrahão
Cavalli,Vanessa
Liporoni,Priscila Christiane Suzy
spellingShingle Porto,Isabel Cristina Celerino de Moraes
Soares,Luis Eduardo Silva
Martin,Airton Abrahão
Cavalli,Vanessa
Liporoni,Priscila Christiane Suzy
Influence of the photoinitiator system and light photoactivation units on the degree of conversion of dental composites
author_facet Porto,Isabel Cristina Celerino de Moraes
Soares,Luis Eduardo Silva
Martin,Airton Abrahão
Cavalli,Vanessa
Liporoni,Priscila Christiane Suzy
author_sort Porto,Isabel Cristina Celerino de Moraes
title Influence of the photoinitiator system and light photoactivation units on the degree of conversion of dental composites
title_short Influence of the photoinitiator system and light photoactivation units on the degree of conversion of dental composites
title_full Influence of the photoinitiator system and light photoactivation units on the degree of conversion of dental composites
title_fullStr Influence of the photoinitiator system and light photoactivation units on the degree of conversion of dental composites
title_full_unstemmed Influence of the photoinitiator system and light photoactivation units on the degree of conversion of dental composites
title_sort influence of the photoinitiator system and light photoactivation units on the degree of conversion of dental composites
description The aim of this study was to observe the influence of two light polymerization units (LED or halogen light) on the degree of conversion (DC) of three dental composites with lighter shades and a different photoinitiator system. The top (T) and bottom (B) surfaces of 60 discs of composite resin (Filtek™ Supreme, Filtek™ Z250, Tetric™ Ceram Bleach) cured either by LED or by halogen lamp (HL) were studied using an FT-Raman spectrometer. The degree of conversion (DC) was evaluated by following the changes in the intensity of the methacrylate C=C stretching mode at 1640 cm-1. The calculated DC ranged from 54.2% (B) to 73.4% (T) and from 60.2% (B) to 76.6% (T) for the LED and HL, respectively. LED and halogen devices were able to produce an adequate DC for all the resins tested.
publisher Sociedade Brasileira de Pesquisa Odontológica - SBPqO
publishDate 2010
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242010000400017
work_keys_str_mv AT portoisabelcristinacelerinodemoraes influenceofthephotoinitiatorsystemandlightphotoactivationunitsonthedegreeofconversionofdentalcomposites
AT soaresluiseduardosilva influenceofthephotoinitiatorsystemandlightphotoactivationunitsonthedegreeofconversionofdentalcomposites
AT martinairtonabrahao influenceofthephotoinitiatorsystemandlightphotoactivationunitsonthedegreeofconversionofdentalcomposites
AT cavallivanessa influenceofthephotoinitiatorsystemandlightphotoactivationunitsonthedegreeofconversionofdentalcomposites
AT liporonipriscilachristianesuzy influenceofthephotoinitiatorsystemandlightphotoactivationunitsonthedegreeofconversionofdentalcomposites
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