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KMID : 0617720000100010001
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Journal of Wonkwang Dental Research Institute
2000 Volume.10 No. 1 p.1 ~ p.8
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The Effect of Curing Methods on the Microleakage of Composite Resin in Primary Teeth
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Abstract
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The purpose of this study was to evaluate the effect of several curing methods on the microleakage of composite resin restoration in primary teeth. Eighty extracted human primary teeth were used and randomly divided into five groups. All cavities were prepared on labial and buccal surfaces of teeth, and composite resin(Z-100) was filled according to the manufacturer´s direction.
The following five groups were established : group I was polymerized for 40 seconds with conventional halogen light; 1,roup 2 was polymerized for 3 seconds with plasma xenon arc light; group 3 was polymerized for 9 seconds with plasma xenon arc light; group 4 was polymerized for 10 seconds with improved halogen light; group 5 was polymerized for 20 seconds with improved halogen light.
The excess cured composite resin was carefully removed with Sof-Lex discs(3M Co.) to expose the original margins of the cavity. The specimens were subjected to 1,000 thermocycles between 51C and. 5 5´C, and immersed in 2% methylene blue solution for 24 hours. And sectioned at the center of filling
body with low speed diamond cutter. The extent of microleakage was evaluated with stereomicroscope and scored.
The results were as follows
1. There were significantly more microleakage in group 3 than all groups(P<0.00--0.05). 2. There was least microleakage in group 4, but statistically insignificant(P>0.05).
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