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Effects of radiant exposure and wavelength spectrum of light-curing units on chemical and physical properties of resin cements
OBJECTIVES: In this study, we evaluated the influence of different radiant exposures provided by single-peak and polywave light-curing units (LCUs) on the degree of conversion (DC) and the mechanical properties of resin cements. MATERIALS AND METHODS: Six experimental groups were established for eac...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Korean Academy of Conservative Dentistry
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5107428/ https://www.ncbi.nlm.nih.gov/pubmed/27847748 http://dx.doi.org/10.5395/rde.2016.41.4.271 |
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author | Lima, Adriano Fonseca Formaggio, Stephanie Ellen Ferreira Zambelli, Lígia França Aires Palialol, Alan Rodrigo Muniz Marchi, Giselle Maria Saraceni, Cintia Helena Coury de Oliveira, Marcelo Tavares |
author_facet | Lima, Adriano Fonseca Formaggio, Stephanie Ellen Ferreira Zambelli, Lígia França Aires Palialol, Alan Rodrigo Muniz Marchi, Giselle Maria Saraceni, Cintia Helena Coury de Oliveira, Marcelo Tavares |
author_sort | Lima, Adriano Fonseca |
collection | PubMed |
description | OBJECTIVES: In this study, we evaluated the influence of different radiant exposures provided by single-peak and polywave light-curing units (LCUs) on the degree of conversion (DC) and the mechanical properties of resin cements. MATERIALS AND METHODS: Six experimental groups were established for each cement (RelyX ARC, 3M ESPE; LuxaCore Dual, Ivoclar Vivadent; Variolink, DMG), according to the different radiant exposures (5, 10, and 20 J/cm(2)) and two LCUs (single-peak and polywave). The specimens were made (7 mm in length × 2 mm in width × 1 mm in height) using silicone molds. After 24 hours of preparation, DC measurement was performed using Fourier transform infrared spectrometry. The same specimens were used for the evaluation of mechanical properties (flexural strength, FS; elastic modulus, E) by a three-point bending test. Data were assessed for normality, after which two-way analysis of variance (ANOVA) and post hoc Tukey's test were performed. RESULTS: No properties of the Variolink cement were influenced by any of the considered experimental conditions. In the case of the RelyX ARC cement, DC was higher when polywave LCU was used; FS and E were not influenced by the conditions evaluated. The LuxaCore cement showed greater sensitivity to the different protocols. CONCLUSIONS: On the basis of these results, both the spectrum of light emitted and the radiant exposure used could affect the properties of resin cements. However, the influence was material-dependent. |
format | Online Article Text |
id | pubmed-5107428 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | The Korean Academy of Conservative Dentistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-51074282016-11-15 Effects of radiant exposure and wavelength spectrum of light-curing units on chemical and physical properties of resin cements Lima, Adriano Fonseca Formaggio, Stephanie Ellen Ferreira Zambelli, Lígia França Aires Palialol, Alan Rodrigo Muniz Marchi, Giselle Maria Saraceni, Cintia Helena Coury de Oliveira, Marcelo Tavares Restor Dent Endod Research Article OBJECTIVES: In this study, we evaluated the influence of different radiant exposures provided by single-peak and polywave light-curing units (LCUs) on the degree of conversion (DC) and the mechanical properties of resin cements. MATERIALS AND METHODS: Six experimental groups were established for each cement (RelyX ARC, 3M ESPE; LuxaCore Dual, Ivoclar Vivadent; Variolink, DMG), according to the different radiant exposures (5, 10, and 20 J/cm(2)) and two LCUs (single-peak and polywave). The specimens were made (7 mm in length × 2 mm in width × 1 mm in height) using silicone molds. After 24 hours of preparation, DC measurement was performed using Fourier transform infrared spectrometry. The same specimens were used for the evaluation of mechanical properties (flexural strength, FS; elastic modulus, E) by a three-point bending test. Data were assessed for normality, after which two-way analysis of variance (ANOVA) and post hoc Tukey's test were performed. RESULTS: No properties of the Variolink cement were influenced by any of the considered experimental conditions. In the case of the RelyX ARC cement, DC was higher when polywave LCU was used; FS and E were not influenced by the conditions evaluated. The LuxaCore cement showed greater sensitivity to the different protocols. CONCLUSIONS: On the basis of these results, both the spectrum of light emitted and the radiant exposure used could affect the properties of resin cements. However, the influence was material-dependent. The Korean Academy of Conservative Dentistry 2016-11 2016-09-26 /pmc/articles/PMC5107428/ /pubmed/27847748 http://dx.doi.org/10.5395/rde.2016.41.4.271 Text en ©Copyrights 2016. The Korean Academy of Conservative Dentistry. http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Lima, Adriano Fonseca Formaggio, Stephanie Ellen Ferreira Zambelli, Lígia França Aires Palialol, Alan Rodrigo Muniz Marchi, Giselle Maria Saraceni, Cintia Helena Coury de Oliveira, Marcelo Tavares Effects of radiant exposure and wavelength spectrum of light-curing units on chemical and physical properties of resin cements |
title | Effects of radiant exposure and wavelength spectrum of light-curing units on chemical and physical properties of resin cements |
title_full | Effects of radiant exposure and wavelength spectrum of light-curing units on chemical and physical properties of resin cements |
title_fullStr | Effects of radiant exposure and wavelength spectrum of light-curing units on chemical and physical properties of resin cements |
title_full_unstemmed | Effects of radiant exposure and wavelength spectrum of light-curing units on chemical and physical properties of resin cements |
title_short | Effects of radiant exposure and wavelength spectrum of light-curing units on chemical and physical properties of resin cements |
title_sort | effects of radiant exposure and wavelength spectrum of light-curing units on chemical and physical properties of resin cements |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5107428/ https://www.ncbi.nlm.nih.gov/pubmed/27847748 http://dx.doi.org/10.5395/rde.2016.41.4.271 |
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