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논문 기본 정보

자료유형
학술저널
저자정보
정기호 (연세대학교 치과대학 예방치과학교실)
저널정보
대한예방치과·구강보건학회 대한구강보건학회지 대한구강보건학회지 제41권 제3호
발행연도
2017.9
수록면
222 - 227 (6page)

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Objectives: The purpose of this study was to evaluate the erosive potential of tea beverages containing citric acid on tooth surfaces. Methods: Specimens of extracted bovine teeth enamel were embedded in resin and polished. The specimens were subjected to one of three treatments (n=10 per treatment group): mineral water, brewed black tea, or black tea beverage. Tooth specimens were exposed to the treatment for 30 minutes and then analyzed using Vickers surface hardness testing and scanning electron microscopy. Results: After 30 minutes of treatment, there were statistically significant differences between the hardness of the enamel pre- and post-treatment in both, the brewed black tea and black tea beverage groups ( P <0.05). The differences in microhardness (△VHN) were ―71.49±14.99, ―9.05±10.25, and ―2.43±15.44 in the black tea beverage, brewed black tea, and mineral water groups, respectively. In the difference of microhardness (△VHN) between groups, the black tea beverage group showed significantly greater changes than the brewed black tea and mineral water groups ( P <0.05). However, there was no significant difference between the brewed black tea group and the mineral water group ( P >0.05). On observation using a scanning electron microscope, the tooth surfaces exposed to the black tea beverage containing citric acid were rougher than the tooth surfaces in the other two groups. Conclusions: This study demonstrates the erosive potential of citric acid-containing tea beverages on tooth surfaces. Thus, there is need to caution people regularly consuming tea beverages containing citric acid, regarding the possibility of tooth surface erosion.

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