Effect of food-simulating solvents on flexural properties of bulk-fill resin composites
Open Access
- 1 January 2021
- journal article
- research article
- Published by Nihon University School of Dentistry in Journal of Oral Science
- Vol. 63 (1), 31-36
- https://doi.org/10.2334/josnusd.20-0082
Abstract
Purpose: This study evaluated the flexural strength of bulk-fills after immersion in food-simulating solvents. Methods: Four overlapping segments along both sides of bar-shaped specimens (25 × 2 × 2 mm) made from bulk-fill composite were irradiated with an Elipar LED light-curing (1,200 mW/cm2 for 20 s) device. The specimens were then divided into four groups (n = 20), according to storage media—namely, distilled water, 99% ethanol, heptane, and methyl ethyl ketone—at 37oC for 4 weeks. Flexural testing was done with a universal testing machine at a crosshead speed of 1 mm/min. Results: Data were analyzed with the two-way and one-way ANOVA and post-hoc Tukey (HSD) tests (P < 0.05), along with the Weibull statistic. Flexural properties significantly differed in relation to the bulk-fill and solvent used. The flexural properties of bulk-fills decreased in solvents. SonicFill in distilled water had the highest values for flexural properties (σf = 165.77 MPa; Ef = 10.3 GPa), followed by the values for SonicFill in ethanol and those for X-tra base and everX Posterior in water. Venus Bulk Fill in methyl ethyl ketone yielded the lowest values (σf = 74.11 MPa; Ef = 3.06 GPa). Conclusion: The flexural properties of bulk-fills are affected by the food-simulating solvent used and by the filler content, type, and resin component.Keywords
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