EFFECTS OF MAGNESIUM AND FLUORIDE ON ION-EXCHANGE AND ACID RESISTANCE OF ENAMEL

被引：4

作者：

FEAGIN, F ^{[1
]}

THIRADILOK, S ^{[1
]}

机构：

[1] UNIV ALABAMA,SCH DENT,INST DENT RES,BIRMINGHAM,AL 35233

来源：

JOURNAL OF ORAL PATHOLOGY & MEDICINE | 1979年 / 8卷 / 01期

关键词：

D O I：

10.1111/j.1600-0714.1979.tb01619.x

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

Abstract Labial surfaces of bovine incisor enamel, after weak acid demineralization, were exposed for 24 h in solutions that contained trace levels of calcium as 45Ca, 0.4 mM NaF, and 1.0 mM MgCl2 at pH 7.0. The solutions approached saturation with apatites in the absence of NaF, and saturation with fluorapatites in the presence of NaF. NaF greatly increased the exchange of 45Ca. MgCl2 decreased 45Ca exchange, but had no effect on F− exchange in the surface minerals. MgCl2 decreased, while NaF increased the acid resistance of the exchanged surface minerals on later exposure to 10 mM acetic acid at pH 4.5. These results indicated that magnesium in oral fluids and tooth minerals may promote caries. Copyright © 1979, Wiley Blackwell. All rights reserved

引用

页码：23 / 27

页数：5

共 11 条

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