Journal of Conservative Dentistry
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Year : 2004  |  Volume : 7  |  Issue : 2  |  Page : 58-62

A Comparative Evaluation Of Depth Of Cure Of A Posterior Composite Cured With Light Emitting Diodes And Halogen Light Cure Unit



Correspondence Address:
R. H Korapati


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The purpose of this study was to evaluate the depth of cure of a dental composite (Filtek P-60, 3M ESPE) using a recently introduced LED-based light curing unit (Elipar freelight, 3M) and a conventional halogen – based LCU (Spectrum 800,Dentsply) A total of 24 specimens were prepared. They were divided into 2 groups: Group I – consisted of 12 specimens cured by halogen unit. Group II – consisted of 12 specimens cured by LED unit. The specimens were subdivided into 2 groups of 6 specimens each. Subgroup A – specimens with height of 2 mm Subgroup B – specimens with height of 4 mm After curing, the top and bottom hardness of each specimen was measured using Vickers hardness tester. The ratio of bottom and top hardness values was used to calculate the percentage depth of cure. The results were statistically analyzed. No significant difference was found in the depth of cure between the LED and halogen LCU.


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