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KMID : 0358920140410020152
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Journal of the Korean Academy of Pedodontics
2014 Volume.41 No. 2 p.152 ~ p.156
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Evaluation of New LED Curing Light on Resin Composite Polymer
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Kang Ji-Eun
Jun Saeromi
Kim Jong-Bin
Kim Jong-Soo
Yoo Seung-Hoon
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Abstract
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The purpose of this study is to compare efficiency of broad spectrum LEDs (VALO®, Ultradent, USA) with conventional LED curing lights (EliparTM Freelight 2, 3M ESPE, USA) using a microhardness test. The light curing units used were VALO® in three different modes and EliparTM Freelight 2. The exposure time was used according to the manufacturer’s instructions. After cured resin specimens were stored in physiological saline at 37℃ for 24 hours, microhardness was measured using Vickers microhardness tester. The microhardness of upper and lower sides of the specimens were analyzed separately by the ANOVA method (Analysis of Variance) with a significance level set at 5%. At upper side of resin specimens, an increased microhardness was observed in the broad spectrum LED curing light unit with a high power mode for 4 seconds and plasma emulation mode for 20 seconds (p < 0.05). However, at the lower side of resin specimens, there were no significant differences in microhardness between broad spectrum LED curing light unit and conventional LED curing light unit.
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KEYWORD
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Light emitting diodes, Broad spectrum, Microhardness, Curing unit
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