Changes of the Mineral Structure in the Enamel Adjacent to Three Types of Restorative Materials after Immersion in Hydrochloric Acid

Erosion is an irreversible process, characterized by thechemical removal of minerals from the tooth surfaces byacids from either extrinsic or intrinsic sources withoutbacterial involvement [1].Gastroesophageal reflux (GERD) is a condition definedas an involuntary passage of gastric fluid against the normalflow of digestive tract [2]. It can be a normal phenomenonin newborns and usually disappears with age; however, insome individuals, its maintenance can be considered apathological condition [3]. The abnormal exposure ofdigestive tract to the stomach contents leads totroublesome symptoms and complications caused by thehigh concentration of H