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KMID : 0988420020140030262
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Journal of Dental Science (C.N.U.)
2002 Volume.14 No. 3 p.262 ~ p.271
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Effect of Light Source and Shade on Depth of Cure of Composite
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Abstract
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The purpose of this study was to evaluate the depth of cure using various curing light sources. XL 3000 for halogen light, Apollo 95E for plasma arc light and Easy cure for LED light source were used in this study. To measure the depth of cure, B1 and A3 shade of Composites (Esthet·X, Dentsply, U.S.A.) were used. The 1,2 and 3mm thick specimens were fabricated according to various curing times and light sources. Victor´s hardness test was performed after 24hours storage in distilled water.
The results were as follows :
1. In all light sources, as the curing times increased the hardness values were decreased(p<0.05).
2. In halogen curing groups, the Victor´s hardness was decreased as the depth increase except between 1mm and 2mm.
3. In halogen-10 and 20second curing groups. the Victor´s hardness of A3 shade were lower than Bl shade, but not in 40second-curing group.
4. There were significant differences in Victor´s hardness between two shades in 2,3mm of Plasma arc and LED light source curing groups(p<0.05). but not in 1mm.
5. In Bl shade, mean 2mm bottom surface hardness value of halogen-40second curing group was 61.46 and it was lower than plasma arc-10second and LED-40second curing group, in A3 shade, 2mm bottom surface hardness value of halogen-40second curing group was 59.70 and it was lower than LED-40second curing group.
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