Propriedades mecânicas de uma resina composta nanohíbrida experimental contendo resveratrol

Abstract

The resin composite is the most used material in direct restorations in the teeth, this occurs due to some of its advantages, such as strength, good esthetics, affordable cost and adhesiveness. To avoid spontaneous polymerization of the resin, substances with potential antioxidants, such as butyl hydroxytoluene (BHT), hydroquinone (HQ) and mono methyl ether hydroquinone (MEHQ) are added. However, both HQ and MEHQ can cause undesired reactions to the patient. Resveratrol has been shown in recent times due to its range of benefits, among them the antioxidant activity. The aim of the study was to evaluate the mechanical properties (compressive strength, tensile, flexure and Knoop microhardness) of a nanohybrid resin composite, in which resveratrol was used as a photopolymerization inhibitor, replacing the mono methyl ether hydroquinone (MEHQ). Compression, tensile, flexural and Knoop microhardness tests were performed using 20 resin composite specimens for each test, 10 for the experimental resin composite and 10 for the control group (Opallis®). Tests were performed after the samples storage in distilled water for 24 hours at 37°C. The results were analyzed statistically using Student's t-test, with a significance level of 5% (α = 0.05). The nanohybrid composite resins (experimental and Opallis®) have shown similar results and no statistical differences were observed on the mechanical tests performed. Despite the lack of scientific reports about the use of resveratrol as a photopolymerization inhibitor agent, it can be observed that its use constitutes an alternative as the experimental resin composite showed similar mechanical properties as the commercial resin composite tested.