期刊
CLINICAL ORAL INVESTIGATIONS
卷 10, 期 1, 页码 66-71出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00784-005-0028-x
关键词
light curing unit; hardness; irradiance; polymerization; temperature increase
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据