Donnish Journal of Dentistry and Oral Hygiene

October 2018 Vol. 4(3), pp. 086-114

ISSN: 2984-8806

Copyright © 2018 Donnish Journals

Original Research Paper

Micro Hardness and Curing Depth of Bulk-Fill Composite Using New Generation of LED Device and Traditional Halogen Lamps: In Vitro

Mona Tariq AL-Daijy¹*, Mohammed Al-Omary² and Roula Al-Bounni³

¹Specialist, Ministry of Health, KSA.
²Department Chairmen Operative Dentistry, Riyadh Elm University, KSA.
³Professor Operative Dentistry, Riyadh Elm University, KSA.

Corresponding Author's Email: aldeijimona@gmail.com

Accepted 10th August, 2018.

Abstract

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Aim: The aim of this in vitro study was to investigate the effect of two different types of light curing using different modes on the microhardness and curing depth of a bulk fill dental composite. Materials and Methods: Forty (40) discs 4mm diameter ×4mm thick) of light-cured resin composite were prepared from (Tetric N-Ceram Bulk Fill, a nano-hybrid low-shrinkage resin-based composite from Ivoclar Vivadent. The specimens were divided into four groups of ten, according to the light curing units used. Before curing the specimens, the light intensity was measured using a radiometer (Bluephase meterfrom Ivoclar Vivadent). Results: The mean microhardness value of the top surface was highest for LED-high mode group (150.156±10.70109 nm) followed by halogen-continuous mode group (137.221±11.47567 nm), LED-low mode group (128.874±8.96043 nm), and lastly in LED-soft start group (112.530±5.19003 nm). The mean microhardness values of the bottom surface showed no statistically significant difference between different activation light curing units (p>0.05).However, the ratio of the mean microhardness top-to-bottom ratio was used to reflect the curing depth (or degree of conversion). Conclusions: LED curing light gives adequate curing depth when used for curing Tetric N-Ceram Bulk Fill at soft start or low mode for(10) seconds.

Keywords: Bulk-filled composite, Dental materials, Micro hardness.

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Cite This Article:

Mona Tariq AL-Daijy, Mohammed Al-Omary and Roula Al-Bounni. Micro Hardness and Curing Depth of Bulk-Fill Composite Using New Generation of LED Device and Traditional Halogen Lamps: In Vitro. Donnish Journal of Dentistry and Oral Hygiene 4(3) 2018 pp. 086-114.