“…[5] However, consumption of acidic food, fruit juices, soft drinks, coffee, tea, or wine, can result in surface damage and decrease hardness, esthetic quality, and other properties of resin composite and giomer. [67891011] There are a number of studies reporting the different surface hardness effects of beverages on resin composite and giomer,[7101213] but only a few of the studies reported effects of apple cider, orange juice, Coca-Cola, coffee, and beer on surface hardness of nanohybrid resin composite and giomer. In addition, the previous studies[712] presented the continuous immersion of resin composite in the selected beverages.…”