title: In vivo rehardening of enamel eroded by a cola drink.
abstract: There are many concerns about the erosive effects of acidic beverages. In this study, the effects of Pepsi-Cola (pH 2.41) on bovine enamel and the rehardening effect resulting from intraoral exposure of the teeth were determined by microhardness testing (Vicker's Hardness Number). Bovine enamel specimens (VHN 380.00 +/- 12.74) were immersed in 100 ml of Pepsi-Cola for five minutes and subsequently exposed to human intraoral environment through the use of a removable resin plate. Microhardness testing was performed on specimens after one hour, twenty-four hours and forty-eight hours of exposure to an intraoral environment. The microhardness value was significantly (p < 0.05) reduced by the cola beverage (VHN 262.13 +/- 20.34), and significantly (p < 0.05) increased after intraoral exposure for one hour (VHN 299.75 +/- 26.86) and twenty-four hours (VHN 328.00 +/- 18.70). The difference in the microhardness between the twenty-four-hour group and the forty-eight-hour group (VHN 333.50 +/- 15.13) was not significant (p > 0.05). The microhardness value of the forty-eight-hour group was significantly less than the values recorded during the initial pre-study measurements p < 0.05).
authors.affiliation: Department of Pediatric Dentistry and Dental Research Institute, College of Dentistry, Seoul National University, Seoul, Korea.
authors.forename: J W
authors.initials: JW
authors.lastname: Kim
authors.forename: K T
authors.initials: KT
authors.lastname: Jang
authors.forename: S H
authors.initials: SH
authors.lastname: Lee
authors.forename: C C
authors.initials: CC
authors.lastname: Kim
authors.forename: S H
authors.initials: SH
authors.lastname: Hahn
authors.forename: F
authors.initials: F
authors.lastname: García-Godoy
mesh_terms: D000143:Acids; D000328:Adult; D000818:Animals; D002253:Carbonated Beverages / Q000009:adverse effects*; D002417:Cattle; D003743:Dental Enamel / Q000503:physiopathology*; D003747:Dental Enamel Solubility / Q000502:physiology; D005260:Female; D006244:Hardness; D006801:Humans; D008297:Male; D012463:Saliva / Q000502:physiology; D013997:Time Factors; D014077:Tooth Erosion / Q000503:physiopathology*; D014089:Tooth Remineralization
chemical_list: D000143:Acids