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. 2014 Mar;8(3):221-4.
doi: 10.7860/JCDR/2014/7463.4167. Epub 2014 Mar 15.

Comparative Evaluation of the Effects of Light Intensities and Curing Cycles of QTH, and LED Lights on Microleakage of Class V Composite Restorations

Anshu M Chandurkar  1 , Sandeep S Metgud  2 , Shaikh Shoeb Yakub  3 , Vaishali J Kalburge  4 , Basawaraj C Biradar  5
Affiliations

Comparative Evaluation of the Effects of Light Intensities and Curing Cycles of QTH, and LED Lights on Microleakage of Class V Composite Restorations

Anshu M Chandurkar et al. J Clin Diagn Res. 2014 Mar.

Abstract

Background: The purpose of this study was to evaluate the effects of light intensity and curing cycles of QTH and LED lights on the microleakage of Class V composite restorations.

Materials and methods: Eighty freshly extracted human maxillary premolars were used for this study. Standardized Class V cavities were prepared and they were restored with microhybrid resin composite. According to the curing protocol, the teeth were then divided into 4 groups (n=20): QTH curing (standard and soft start modes), and LED (standard and soft start modes) irradiations. Microleakage was evaluated by immersion of the samples in 50% silver nitrate solution. The samples were then sectioned, evaluated under a stereomicroscope, and scored for microleakage.

Results: The results of the present in-vitro study showed mean dye leakage scores of 1.9, 1.2, 1.45 and 0.90 for Group I (QTH-Standard mode), Group II (QTH-Soft Start mode), Group III (LED-Standard mode) and Group IV (LED-Soft Start mode) respectively.

Conclusion: It was thus concluded that the soft start polymerization showed a highly significant difference as compared to the standard curing modes of QTH and LED lights, respectively.

Keywords: Composite resin; Dental leakage; Halogen light curing; LED light curing; Marginal adaptation.

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Figures

[Table/Fig-6]:
[Table/Fig-6]:
Dye leakage in different groups
See this image and copyright information in PMC

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