氟对表层牙釉质离子交换、再矿化及耐酸性的影响。

Effect of fluoride on ion exchange, remineralization and acid resistance of surface enamel.

作者信息

Aponte-Merced L A, Feagin F F

出版信息

J Oral Pathol. 1979 Dec;8(6):333-9. doi: 10.1111/j.1600-0714.1979.tb01836.x.

DOI:10.1111/j.1600-0714.1979.tb01836.x

Abstract

In a system of constant ion activities the rates of F- exchange in enamel, under conditions of exchange alone and remineralization, depended on the concentration of F- in solutions. Acid resistance of surface minerals resulted from exchange of F- for OH- in the enamel at pH 7.0 and 4.5. The level of 0.5 mM NaF, compared to 0.05 and 6.0 mM, caused maximum rates of isotopic exchange of 45Ca and maximum acid resistance of enamel. Similarly low levels of F- may be feasible for use in caries prevention in the absence and presence of remineralization.

摘要

在离子活度恒定的体系中，仅在交换及再矿化条件下，牙釉质中氟离子（F⁻）的交换速率取决于溶液中F⁻的浓度。在pH值为7.0和4.5时，牙釉质表面矿物质的耐酸性源于F⁻与OH⁻的交换。与0.05 mM和6.0 mM相比，0.5 mM的氟化钠（NaF）水平导致⁴⁵Ca的同位素交换速率最高，且牙釉质的耐酸性最强。同样，在有无再矿化的情况下，低水平的F⁻用于预防龋齿可能也是可行的。