유산완충액을 이용한 인공치아우식의 형성에 미치는 산의 농도와 pH에 관한 연구
The effect of acid concentration and pH of lactate buffer solution on the progress of artificial caries lesion in human tooth enamel
박성호, 홍승록, 박정미,
소속 상세정보
박성호 ( ) - 연세대학교
홍승록 ( ) - 연세대학교
박정미 ( ) - 연세대학교
KMID : 0362319930180020277
Abstract
Dental caries is considered to be caused by demineralization by organic acid produced by microorganism, But the formation of subsurface lesion in initial caries make it diffcult to explain by simple demineralization. This study is carried out on
the
basis of thermodyamic concept proposed by Margolis and Moreno. The purpose of this study is to evaluate the effects of acid concentration and pH of lactate buffer system on the artificial caries lesion progress. 160 teeth without any crack,
defect
or
opaque enamel were used and coated with nail varnish except the window (2×3mm). Under the constant degree of saturation(D. S.). The teeth were divided into 8 groups acccording to acid concentration (10mM, 25mM, 50mM, 100mM) and pH(4.3, 5.0,
6.0).
Each
group was immersed in buffer solution for 3, 6, 9, 18 days under controlled temperature(25℃)
After cutting through the window and grinding, the specimens, 100-150 um in thickness, were imbibed in water or air and examined using polarilizing microscope.
@ES The depth of the surface and subsurface surface lesion were measured.
@EN 1. In the constant pH and D.S. value, the subsurface lesion progresses more rapidly as the concentration of lactic acid increases. (0.01, 0.025, 0.05, 0.1)
2. In the constant acid concentration and DS value, the subsurface lesion progresses more slowly as the pH increases. (4.3, 5.0, 5.5, 6.0)
3. The width of surface lesion seems to be constant independant of pH and acid concentration.
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