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Effect of Pepsi and 40% Hydrogen Peroxide on Microhardness of Amaris Composite Resin: An In Vitro Experimental Study | Abstract

Journal of Research in Medical and Dental Science
eISSN No. 2347-2367 pISSN No. 2347-2545

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Effect of Pepsi and 40% Hydrogen Peroxide on Microhardness of Amaris Composite Resin: An In Vitro Experimental Study

Author(s): Somayyeh Hoseini Tabatabaei, Aliyeh Sehatpour, Mohammad Sadegh Abedinejad, Fatemeh Kadkhodaei Oliadarani

Abstract

The purpose of this study was to evaluate the effect of Pepsi and 40% hydrogen peroxide on microhardness of Amaris composite resin. In this in vitro experimental study, 30 cylindrical samples of Amaris composite resin (6 mm in diameter and 2 mm in thickness) were fabricated and light-cured. Samples were divided into three groups (n=10). Ten composite samples were stored in distilled water at 37??? and served as the control group. Ten samples were exposed to 40% hydrogen peroxide bleaching gel for six and 42 hours (first experimental group). The remaining 10 samples were stored in Pepsi for six and 42 hours. The microhardness of composite samples was measured using Vickers microhardness tester under 100 g load applied for 10 seconds before and after the intervention. The obtained data were analyzed using SPSS 16 via one-way ANOVA and post hoc test (P≤0.05). Microhardness of composite decreased at both six and 42 hours after immersion in water (P=0.048), Pepsi (P<0.001) and %40 hydrogen peroxide (P<0.001). Comparison of the three groups showed significant differences between the Pepsi and 40% hydrogen peroxide groups at baseline (P=0.011), distilled water and 40% hydrogen peroxide at six hours (P=0.004), distilled water and Pepsi at 42 hours (P=0.003) and distilled water and 40% hydrogen peroxide at 42 hours (P<0.001). According to the results of this study, water, Pepsi and 40% hydrogen peroxide all decrease the microhardness of Amaris composite resin.

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