Abstract
ObjectiveThe purpose of this study was to assess the effect of food-simulating liquids on the flexural strength of a methacrylate-based and a silorane-based resin composite.Materials and methodsIn this in vitro study, sixty specimens of Filtek P90 and Filtek Z350 composite were prepared in a customized mold (2 × 2 × 25 mm). The specimens of each composite were divided into five subgroups as follows: one as a control group and the other four groups included distilled water, heptane, 2% citric acid, and 50% aqueous ethanol. The specimens were stored in the solutions for one week at 37°C, and the control group was stored at room temperature for the same period of time. Then, flexural strength values were measured. The statistical analysis was performed by One-Way ANOVA, Paired T test and post hoc LSD at a significance level of 0.05.ResultsIn the control group, the mean flexural strength of Filtek P90 and Filtek Z350 were 155.1 MPa and 147.3 MPa, respectively, and there was no significant difference (P-value>0.05). The mean flexural strength of Filtek P90 and Filtek Z350 significantly decreased in ethanol (P-value <0.05). Immersion in 0.02 N citric acid and heptane had no significant effect on the flexural strength of Filtek P90 and Filtek Z350. The maximum flexural strength of Filtek P90 was in the heptane group (192.6 MPa) and minimum flexural strength was in ethanol group (92.7 MPa) the maximum flexural strength of Filtek Z350 was in the heptane group (163.2 MPa) and minimum flexural strength was in the ethanol group (104.7 MPa).ConclusionThe flexural strength of tested resin composites significantly affected by ethanol solution. The flexural strength of resin composites was not affected by other food simulating liquids.
Highlights
Resin composites are widely used in modern dentistry today
The mean flexural strength of Filtek P90 and Filtek Z350 significantly decreased in ethanol (P-value
Immersion in 0.02 N citric acid and heptane had no significant effect on the flexural strength of Filtek P90 and Filtek Z350
Summary
A wide range of composite materials including conventional composites, such as hybrid, nanofilled, silorane, Ormocer, and Compomer, are available for direct restorations The differences between these materials regarding the type of monomer, filler composition, and the chemical structure of binding agent of the filler matrix (silane) have led to differences in mechanical characteristics of these materials resulting in differences in the resistance of the composites against mechanical forces and chemical damage [1]. The resin composites are intermittently or continuously exposed to chemical compositions of saliva, food, and drinks Organic acids and their many derivatives and food-like fluids can cause softening of the resin matrix of the composite resin restorations. The aim of this study was to investigate the effect of food simulating liquids on the flexural strength of a methacrylate and a silorane-based composite. The null hypothesis of the study is that the food simulating liquids affect the flexural strength of methacrylate and silorane-based composite
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
