Dental erosion is the irreversible loss of dental hard tissue by acids not by bacteria. The prevalence rate of dental
erosion is on the rise these days, and the consumption of acidic beverages is recognized as one of the main
risk factors. Therefore, in this study, pH of certain commercial fruit juices was measured to determine whether
they cause enamel corrosion of teeth, and the changes in calcium (Ca) and phosphorous (P) were evaluated by
quantitative analysis using energy dispersive X-ray spectroscopy (EDS). As the pH decreased, the solubility of
Ca increased, and as the exposure time increased, the loss of Ca was greater. Ingestion of fruit juice with a low
pH affects the risk of dental erosion, and the retention time of the juice in oral cavity should be shortened as
long-term contact with the juice may cause the tooth damage.