Journal of the Korean Academy of Pediatric Dentistry 2006;33(3):438-446.
Published online August 31, 2006.
MARGINAL LEAKAGE OF COMPOSITE RESIN AND COMPOMER RESTORATIONS CURED WITH THREE DIFFERENT LIGHT SOURCES
 
Correspondence:  , 
Abstract
The purpose of this study was to evaluate the microleakage of composite resin(Z250®) and compomer(Dyract AP) cured with various curing lights(Elipar TriLight®, Flipo®, and Elipar FreeLight 2®). Box-shaped class V cavities were prepared on the buccal and lingual surfaces of extracted human third molars. The sectioned specimens were evaluated for dye penetration and following results were obtained. 1. Regarding microleakage in the enamel margin with different curing light sources, there was no significant difference in Dyract AP whereas Z250® with Flipo® showed higher microleakage score than those of FreeLight 2® or TriLight®(p<0.05). 2. Regarding microleakage in the dentin margin with curing light sources, there were no significant differences in both Dyract AP and Z250® (p>0.05). 3. Regarding microleakage in the enamel margin with filling materials. there were no significant differences in both filling materials with Flipo® whereas Z250® showed less microleakage than Dyract AP with FreeLight 2® or TriLight® (p<0.05). 4. Regarding microleakage in the dentin margin with filling materials, there wer no significant differences in both filling materials with TriLight® whereas Z250® showed less microleakage than Dyract AP with FreeLight 2® or Flipo® (p<0.05). 5. Enamel margin showed less microleakage than dentin margin when filled with Dyract AP and cured with Flipo® or FreeLight 2® (p<0.05), but there were no statistically significant differences between the enamel and the dentin in the rest groups. This study suggested that Z250® showed lower microleakage score than Dyract AP. and that Flipo® showed higher microleakage score than FreeLight 2® and TriLight® in the enamel margin filled with Z250®.
Key Words: Curing lights, Light curing composite resin, Microleakage


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