“…Endogenous erosion occurs when the teeth are exposed to hydrochloric acid produced by the stomach through gastric reflux, frequent vomiting (due to, e.g., anorexia, bulimia, alcoholism, gastrointestinal disorders, and pregnancy) or regurgitation in case of rumination [6,22]. Exogenous erosion may be caused by acidic diets (e.g., carbonated soft drinks, fruit, fruit juices), medications, or occupational exposure (e.g., workers at battery, ammunition and galvanizing factories; wine testers; professional swimmers) [8]. Dental erosion can alter the original morphology of a tooth, flattening convex areas and resulting in the formation of occlusal concavities and an intact palatal border of enamel along the gingival margin [23,24] (Fig.4).…”