A STUDY ON THE ENAMEL EROSION CAUSED BY ACIDIC BEVERAGE AND REHARDENING BY INTRAORAL EXPOSURE

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Journal of the Korean Academy of Pediatric Dentistry 1998;25(2):312-322.
Published online May 31, 1998.

A STUDY ON THE ENAMEL EROSION CAUSED BY ACIDIC BEVERAGE AND REHARDENING BY INTRAORAL EXPOSURE

산성 음료수에 의한 법랑질 침식과 구강내 재경화에 관한 연구

김정욱

서울대학교 치과대학 소아치과학교실 및 치학연구소

Abstract

There are many concerns about the erosive effect of acidic beverage. In this study, the erosive effect of bovine enamel caused by Pepsi-Cola^®(pH 2.41) and rehardening effect by intraoral exposure were determined by microhardness test and SEM. The bovine enamel specimen was imbedded in 100ml Pepsi-Cola^® during 5 minutes and exposed to the intraoral environment with removable resin plate. The microhardness test was performed after 1 hr, 24 hrs, and 48 hrs. The results obtained from this study can be summarized as follows ; 1. The microhardness value was significantly (p<0.05) reduced by cola beverage, and significantly (p<0.05) increased after 1 hr and 24 hrs respectively. 2. The difference in the microhardness between 24 hrs group and 48 hrs group was not significant (p>0.05) and microhardness value of 48 hrs group was significantly less than that of initial group (p<0.05). 3. The erosive effect of cola beverage and remineralization effect by intraoral exposure were visualized by the SEM photo. But, the enamel surfaces did not return to their original state.

Key Words: beverage, enamel, erosion, rehardening