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Patterns of fluoride distribution on the surface of a tooth fragment after clinical treatment with fluoride gel.

This paper describes site-to-site variations in fluoride concentration in the surface region of a tooth fragment sent from a patient who, following radiation therapy, had been repeatedly treated with fluoride gel. The fluoride content of the tooth surface was determined with the intention of establishing the extent to which the treatment had enhanced the fluoride content of the tooth surface. The work illustrates the difficulties in the choice of a suitable sampling site and the importance of adopting a suitable sampling technique. It highlights, once again, some of the problems encountered in attempting to interpret analytical data about fluoride levels in tooth surfaces.