Effect of Quartz-tungsten-halogen and Light-emitting Diode-curing Units on the Depth of Cure and Flexural Strength of a Nanohybrid Composite Resin: An In Vitro Study
Journal Title: INTERNATIONAL JOURNAL OF SCIENTIFIC STUDY - Year 2019, Vol 6, Issue 11
Abstract
Introduction: Over the years, the demand for esthetic dentistry has grown dramatically and there has been a rapid development of new adhesive restorative materials with nanotechnology that can restore the color and characteristics of natural tooth. To polymerize these materials, light-curing dental materials extensively used are quartz-tungsten-halogen (QTH) and light-emitting diode (LED)-curing units. Literature search revealed that depth of cure and flexural strength are the most important properties of composite resin materials, relevant to the clinical technique of incremental packing and curing. Purpose: The objectives of the present study were to evaluate and compare the depth of cure and flexural strength of a nanohybrid composite resin. Materials and Methods: Two light-curing units were selected for this study: QTH (Bonart, Unicorn) and LED (Ivoclar Vivadent, Bluephase® N). The depth of cure was evaluated with scraping technique using digital caliper and flexural strength was evaluated using universal testing machine with a crosshead speed of 1 mm/min. Results: Descriptive statistics was employed to measure the mean and standard deviation of the depth of cure and flexural strength. Unpaired “t”-test was used to compare the study variables. Statistical significance was fixed at ≤0.05 and LED-curing unit showed significantly greater depth of cure and flexural strength when compared to QTH curing unit. Conclusion: Curing effectiveness of resin composite is dependent on the light-curing unit.
Authors and Affiliations
Anushri Dhananjay , Shah, Sharad Basavraj Kamat, Santosh Irappa Hugar, Girish Shankar Nanjannawar, Pranav Devendra Patil
Keywords
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