Influence of bulk-fill composite types, shades and lightcuring units on microhardness
Influence of bulk-fill composite types, shades and lightcuring units on microhardness
Aim: The aim of this study was to investigate the microhardness of sonic-activated and high-viscosity bulk-fill resin-basedcomposites (RBCs) in different shades polymerized by using two different light emitting diode (LED) light curing units (LCUs).Material and Methods: Eight groups (n=4) of composite samples with two different shades (A2, A3) of sonic-activated bulk-fill RBCs(SonicFill™) and high-viscosity bulk-fill RBCs (Reveal HD Bulk) were prepared to evaluate the Vickers microhardness (VMH) values.To collect microhardness data for both the upper and the lower sample surfaces, the cylindrical bulk-fill RBC samples with a depthof 4 mm and diameter of 10 mm were cured with two different LED LCUs (Valo Ultradent, Ultradent Products Inc., South Jordan, UT;Demi Ultra, Kerr Dental, USA) with the light-guide tip positioned in contact with a glass slide on the upper surface of the samples.Three-way ANOVA and Student’s t-test analyses were performed with the results obtained. Comparisons were performed using asignificance level of p
___
- 1. Rodriguez A, Yaman P, Dennison J, et al. Effect of Light-Curing Exposure Time, Shade, and Thickness on the Depth of Cure of Bulk Fill Composites. Oper Dent 2017;42:505-13.
- 2. Farahat F, Daneshkazemi AR, Hajiahmadi Z. The Effect of Bulk Depth and Irradiation Time on the Surface Hardness and Degree of Cure of Bulk-Fill Composites. J Dent Biomater 2016;3:284-91.
- 3. Maghaireh GA, Price RB, Abdo N, et al. Effect of Thickness on Light Transmission and Vickers Hardness of Five Bulk-fill Resin-based Composites Using Polywave and Single-peak Light-emitting Diode Curing Lights. Oper Dent 2019;44:96-107.
- 4. Oter B, Deniz K, Cehreli SB. Preliminary data on clinical performance of bulk-fill restorations in primary molars. Niger J Clin Pract 2018;21:1484-91.
- 5. Ilie N, Luca BI. Efficacy of Modern Light Curing Units in Polymerizing Peripheral Zones in Simulated Large Bulk-fill Resin-composite Fillings. Oper Dent 2019; 44:416-25.
- 6. Shimokawa CAK, Turbino ML, Giannini M, et al. Effect of light curing units on the polymerization of bulk fill resin- based composites. Dent Mater 2018;34:1211- 21.
- 7. Gan JK, Yap AU, Cheong JW, et al. Bulk-Fill Composites: Effectiveness of Cure With Poli-and Monowave Curing Lights and Modes. Oper Dent 2018;43:136-43.
- 8. Kaya MS, Bakkal M, Durmus A, et al. Structural and mechanical properties of a giomer-based bulk fill restorative in different curing conditions. J Appl Oral Sci 2018;26:20160662.
- 9. Faria-E-Silva AL, Fanger C, Nguyen L, et al. Impact of Material Shade and Distance from Light Curing Unit Tip on the Depth of Polymerization of Composites. Braz Dent J 2017;28:632-7.
- 10. Krämer N, Lohbauer U, García-Godoy F, et al. Light curing of resin-based composites in the LED era. Am J Dent 2008;21:135-42.
- 11. Sabatini C. Comparative study of surface microhardness of metacrylate-based compositeresins polymerized with light-emitting diodes and halogen, Eur J Dent 2013;7:327-35.
- 12. Lima RBW, Troconis CCM, Moreno MBP, et al. Depth of cure of bulk fill resin composites: A systematic review. J Esthet Restore Dent 2018;30:492-501.
- 13. Leonard DL, Charlton DG, Roberts HW, et al. Polymerization efficiency of LED curing lights. J Esthet Restore Dent 2002;14:286-95.
- 14. Theodoridis M, Dionysopoulos D, Koliniotou-Koumpia E, et al. Effect of Preheating and Shade on Surface Microhardness of Siloran-Based Composites. J Inversting Clin Dent 2017;8.