Fluoride Content in Human Enamel after Fluoride Application and Washing – An in vitro Study

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Abstract
The purpose of this study was to compare the F–– acquisition of enamel of APF solutions, NH4F containing solutions, organic fluoride solutions and a urethane lacquer-containing silane fluoride. The F–– content as a function of the distance from the anatomical surface was studied after one application, after 24 h of washing in tap water and after 1 week of washing. The results indicate that one treatment with the F–– containing lacquer introduces an amount of permanently deposited fluoride comparable to that of a great number of applications by the other solutions mentioned. The silane fluoride-containing lacquer introduces about 2,000 ppm of permanently bonded F–– in an average surface of 8 μm thickness.

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