Penetration of Fluorine from Sodium Monofluorophosphate into Artificially Produced Incipient Enamel Lesions

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Abstract
Artificially produced incipient lesions of bovine enamel were treated in vitro with several concentrations of sodium monofluorophosphate for various times up to 24 h. Analysis of eight layers of enamel removed with acid showed that F concentrations in treated teeth were higher within the lesion than at the surface. Longer treatment times or higher F concentrations increased F uptake but did not alter the basic shape of the enamel F profile (F concentration, vs. depth). Lesions differing in severity but similarly treated with monofluorophosphate had enamel F profiles that extended more deeply into the enamel as severity increased although the maximum F concentration in the lesion usually did not change significantly.

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