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KMID : 1157520180140020145
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International Journal of Clinical Preventive Dentistry
2018 Volume.14 No. 2 p.145 ~ p.151
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Comparative Evaluation of Depth of Cure of Three High Viscosity Bulk Fill Composites versus Conventional Composite: An In Vitro Study
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Singla Meenu G.
Relhan Nikhil
Virdi Ishpreet
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Abstract
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Objective: The aim of this study was to evaluate the microhardness and depth of cure of three high viscosity bulk fill resin composites and to compare it with a conventional composite.
Methods: To evaluate depth of cure, the composite specimen was prepared using metallic mold with a hole of 4 mm depth and 4 mm internal diameter which was bulk filled with each of the three bulk fill composites (SonicFill, Filtek Bulk Fill Posterior & Beautifil Bulk Restorative) and light cured for 20 seconds. The conventional composite (Tetric N Ceram) was filled in the increments of 2-mm. The top and bottom surface hardness was measured using a Vickers microhardness indenter. The depth of cure was then calculated by dividing the bottom & top mean hardness values.
Results: Sonicfill showed maximum surface microhardness followed by Beautifil Bulk restorative, Tetric N Ceram and Filtek Bulk Fill. Maximum depth of cure was seen in SonicFill followed by Filtek Bulk Fill, Tetric N Ceram and Beautifil Bulk restorative and the difference was statistically significant. SonicFill and Filtek Bulk Fill were able to achieve the minimum depth of cure value ≥0.80 at 4-mm depth. Beautiful bulk restorative composite was not able to achieve the minimum bottom to top ratio of 0.80.
Conclusion: Microhardness and depth of cure is a material specific property and factors such as composition; content and size of fillers; viscosity and translucency of the material play an important role in determining the properties of the bulk fill composite.
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KEYWORD
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high viscosity bulk-fill composites, giomers, depth of cure, Vickers microhardness
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