The degree and rate of fluoride absorption in five volunteers were studied after ingestion of SnF2and NaF solutions or SnF2toothpaste. The fluoride concentration in plasma was followed for eight hours. The relative bio-availability of fluoride was calculated and was similar for both the NaF and SnF2solutions, although the latter solution showed a somewhat faster absorption rate. The bio-availability of fluoride from the SnF2dentifrice was 85%.
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