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|Type:||Artigo de periódico|
|Title:||Halogen and LED light curing of composite: Temperature increase and Knoop hardness|
|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|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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