Abstract
Enamel biopsies were taken from two sites, centrally and gingivally, on the buccal surfaces of the maxillary teeth of 14-year old schoolchildren. The difference between the fluoride content of the two sites increased the longer the tooth had been in the oral cavity. This relationship was confirmed by biopsies taken from upper central incisors of 7-year old children, which showed no such difference. The fluoride content of the upper central incisors was closely correlated to the grand mean fluoride content of all the other biopsies from the same individual. No relationship could be found between the enamel fluoride content and the caries status for the 14-year old subjects.
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