Effect of food-simulating solvents on flexural properties of bulk-fill resin composites

Abstract

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/cm 2 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 37 o C 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 (σ f = 165.77 MPa; E f = 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 (σ f = 74.11 MPa; E f = 3.06 GPa). Conclusion: The flexural properties of bulk-fills are affected by the foodsimulating solvent used and by the filler content, type, and resin component.

Effect of carbonated beverages on flexural strength of composite restorative material

“…Despite the huge volume of gel holes remaining in the material, removing such macrodefects resulted in flex strengths of up to 70 MPa. [ 28 29 ] Some studies have shown a decrease of the flexural strength of composite resin when immersed in various fruit juices of different concentrations. [ 30 31 ]…”

Evaluation of flexural strength of bulk-fill composite resin after immersion in fruit juices: An in vitro study

“…In a study conducted by Marghalani (2020), it has reported that the flexural strength post immersion in solvents such as distilled water, ethanol, and hexane shows no statistical significance ( P > 0.05), which is similar to our present study. [ 32 ]…”

In vitro attrition wear resistance of four types of paste-like bulk-fill composite resins

“…Hybrid filler fractions and E-glass fibers (1–2 mm length), Ba-B-Si glass filler (0.1–2.2 µm) [ 17 ]…”