Fluoride distribution in the facial surfaces of human maxillary central incisors

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Abstract
The fluoride distributions in the incisal, middle and cervical regions of the facial surfaces of 6 maxillary central incisors were determined by 3 successive acid etch biopsy procedures. The fluoride concentrations were adjusted to standardized depths of 0-10, 10-20 and 20-30 .mu.m. In the biopsy areas the enamel fluoride concentrations decreased with increasing depth. In all the teeth the fluoride content was lowest in the incisal region and highest at the cervical third.