Objective: To evaluate the effect of light-emitting diode (LED) curing light and Halogen dental curing light on the microleakage of Clearfil AP-X composite restorations and to provide evidence for clinical use of LED curing light.
Methods: Class V cavities were prepared in 73 freshly extracted teeth. The teeth were randomly divided into two groups being exposed to light-emitting diode curing light MORITA PENCURE and halogen light 3M ESPE Elipar 2500 respectively, and then treated with thermocycling (500 cycles, 5-55 degrees C), section and dyeing. The amounts of dye infiltration and marginal seal were examined by stereomicroscope and scanning electron microscope (SEM) respectively.
Results: No significant differences were found in the amount of dye infiltration shown in the stereo-photomicrograph between the two groups. However, the SEM revealed better marginal seals of those teeth exposed to LED curing light.
Conclusion: The LED curing light may be able to achieve the same or better effect on reducing microleakage compared with the Halogen dental curing light. Further studies are needed.
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