Figure 2: Results of this study. (a) ARE activity. Means followed by the same letter do not differ by the Games-Howell test. (b) Cell viability. (c) BSE images. (d) Chemical structures of resin monomers used in composite resins. *Significant different at 5% between samples A and B. ARE: Antioxidant-responsive element, BSE: Backscattered electron, Bis-GMA: Bisphenol A-glycidyl methacrylate, TEGDMA: Triethylene glycol dimethacrylate, UDMA: Urethane-dimethacrylate, Bis-MEPP: Bisphenol a ethoxylate dimethacrylate