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Evaluation of microleakage of class II dental composite resin restorations cured with LED or QTH dental curing light; Blind, Cluster Randomized, In vitro cross sectional study

BACKGROUND: The aim of this study is to compare the microleakage of Class II dental composite resin restorations which have been cured by three different LED (light emitting diode) light curing modes compared to control samples cured by QTH (quartz tungsten halogen) light curing units (LCUs), to det...

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Autores principales: Zakavi, Faramarz, Golpasand Hagh, Leila, Sadeghian, Soheila, Freckelton, Virginia, Daraeighadikolaei, Arash, Ghanatir, Elham, Zarnaghash, Najmeh
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4085696/
https://www.ncbi.nlm.nih.gov/pubmed/24990296
http://dx.doi.org/10.1186/1756-0500-7-416
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author Zakavi, Faramarz
Golpasand Hagh, Leila
Sadeghian, Soheila
Freckelton, Virginia
Daraeighadikolaei, Arash
Ghanatir, Elham
Zarnaghash, Najmeh
author_facet Zakavi, Faramarz
Golpasand Hagh, Leila
Sadeghian, Soheila
Freckelton, Virginia
Daraeighadikolaei, Arash
Ghanatir, Elham
Zarnaghash, Najmeh
author_sort Zakavi, Faramarz
collection PubMed
description BACKGROUND: The aim of this study is to compare the microleakage of Class II dental composite resin restorations which have been cured by three different LED (light emitting diode) light curing modes compared to control samples cured by QTH (quartz tungsten halogen) light curing units (LCUs), to determine the most effective light curing unit and mode of curing. RESULTS: In this experimental study, class II cavities were prepared on 100 sound human premolars which have been extracted for orthodontic treatment. The teeth were randomly divided into four groups; three experimental and one control group of 25 teeth each. Experimental groups were cured by either conventional, pulse-delay, or ramped curing modes of LED. The control group was cured for 20 seconds by QTH. The restorations were thermocycled (1000 times, between 5 and 55°C, for 5 seconds dwell time), dyed, sectioned mesio-distally and viewed under stereo-microscope (40×) magnification. Teeth were then scored on a 0 to 4 scale based on the amount of microleakage. The data were analyzed by Chi-square test. No significant difference was demonstrated between the different LCUs (light curing units), or modes of curing, at the enamel side (p > 0.05). At the dentin side, all modes of LED curing could significantly reduce microleakage (p < 0.05). The results suggest that slow start curing improves marginal integrity and seal. High intense curing endangers those aims. CONCLUSIONS: Comparison between the three LED mode cured composite resin restorations and QTH curing showed LED curing in all modes is more effective than QTH for reducing microleakage. Both LED and QTH almost completely eliminate the microleakage on the enamel side, however none of them absolutely eliminated microleakage on the dentin side.
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spelling pubmed-40856962014-07-09 Evaluation of microleakage of class II dental composite resin restorations cured with LED or QTH dental curing light; Blind, Cluster Randomized, In vitro cross sectional study Zakavi, Faramarz Golpasand Hagh, Leila Sadeghian, Soheila Freckelton, Virginia Daraeighadikolaei, Arash Ghanatir, Elham Zarnaghash, Najmeh BMC Res Notes Research Article BACKGROUND: The aim of this study is to compare the microleakage of Class II dental composite resin restorations which have been cured by three different LED (light emitting diode) light curing modes compared to control samples cured by QTH (quartz tungsten halogen) light curing units (LCUs), to determine the most effective light curing unit and mode of curing. RESULTS: In this experimental study, class II cavities were prepared on 100 sound human premolars which have been extracted for orthodontic treatment. The teeth were randomly divided into four groups; three experimental and one control group of 25 teeth each. Experimental groups were cured by either conventional, pulse-delay, or ramped curing modes of LED. The control group was cured for 20 seconds by QTH. The restorations were thermocycled (1000 times, between 5 and 55°C, for 5 seconds dwell time), dyed, sectioned mesio-distally and viewed under stereo-microscope (40×) magnification. Teeth were then scored on a 0 to 4 scale based on the amount of microleakage. The data were analyzed by Chi-square test. No significant difference was demonstrated between the different LCUs (light curing units), or modes of curing, at the enamel side (p > 0.05). At the dentin side, all modes of LED curing could significantly reduce microleakage (p < 0.05). The results suggest that slow start curing improves marginal integrity and seal. High intense curing endangers those aims. CONCLUSIONS: Comparison between the three LED mode cured composite resin restorations and QTH curing showed LED curing in all modes is more effective than QTH for reducing microleakage. Both LED and QTH almost completely eliminate the microleakage on the enamel side, however none of them absolutely eliminated microleakage on the dentin side. BioMed Central 2014-07-03 /pmc/articles/PMC4085696/ /pubmed/24990296 http://dx.doi.org/10.1186/1756-0500-7-416 Text en Copyright © 2014 Zakavi et al.; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research Article
Zakavi, Faramarz
Golpasand Hagh, Leila
Sadeghian, Soheila
Freckelton, Virginia
Daraeighadikolaei, Arash
Ghanatir, Elham
Zarnaghash, Najmeh
Evaluation of microleakage of class II dental composite resin restorations cured with LED or QTH dental curing light; Blind, Cluster Randomized, In vitro cross sectional study
title Evaluation of microleakage of class II dental composite resin restorations cured with LED or QTH dental curing light; Blind, Cluster Randomized, In vitro cross sectional study
title_full Evaluation of microleakage of class II dental composite resin restorations cured with LED or QTH dental curing light; Blind, Cluster Randomized, In vitro cross sectional study
title_fullStr Evaluation of microleakage of class II dental composite resin restorations cured with LED or QTH dental curing light; Blind, Cluster Randomized, In vitro cross sectional study
title_full_unstemmed Evaluation of microleakage of class II dental composite resin restorations cured with LED or QTH dental curing light; Blind, Cluster Randomized, In vitro cross sectional study
title_short Evaluation of microleakage of class II dental composite resin restorations cured with LED or QTH dental curing light; Blind, Cluster Randomized, In vitro cross sectional study
title_sort evaluation of microleakage of class ii dental composite resin restorations cured with led or qth dental curing light; blind, cluster randomized, in vitro cross sectional study
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4085696/
https://www.ncbi.nlm.nih.gov/pubmed/24990296
http://dx.doi.org/10.1186/1756-0500-7-416
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