Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/68559
Type: Artigo de periódico
Title: Halogen and LED light curing of composite: Temperature increase and Knoop hardness
Author: Schneider, LF
Consani, S
Correr-Sobrinho, L
Correr, AB
Sinhoreti, MA
Abstract: This study assessed the Knoop hardness and temperature increase provided by three light curing units when using (1) the manufacturers' recommended times of photo-activation and (2) standardizing total energy density. One halogen - XL2500 (3M/ESPE) - and two light-emitting diode (LED) curing units - Freelight (3M/ESPE) and Ultrablue IS (DMC) - were used. A type-K thermocouple registered the temperature change produced by the composite photo-activation in a mold. Twenty-four hours after the photo-activation procedures, the composite specimens were submitted to a hardness test. Both temperature increase and hardness data were submitted to ANOVA and Tukey's test (5% significance). Using the first set of photo-activation conditions, the halogen unit produced a statistically higher temperature increase than did both LED units, and the Freelight LED resulted in a lower hardness than did the other curing units. When applying the second set of photo-activation conditions, the two LED units produced statistically greater temperature increase than did the halogen unit, whereas there were no statistical differences in hardness among the curing units.
Subject: light curing unit
hardness
irradiance
polymerization
temperature increase
Country: Alemanha
Editor: Springer Heidelberg
Rights: fechado
Identifier DOI: 10.1007/s00784-005-0028-x
Date Issue: 2006
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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