Fluoride in the Surface Enamel of Unerupted Teeth

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Abstract
The surface enamel layer of 72 unerupted 3rd molar teeth with completely and incompletely developed roots extracted from 10-40 year old patients were analyzed for fluoride. The mean fluoride contents of the different surface enamel layers varied between 59.2 and 141.7 ppm. The mean fluoride values of the surface enamel layers of the teeth with completely developed roots were significantly higher as compared to the corresponding surfaces of the teeth with incompletely developed roots in the 26-40 year group. The differences between the mean fluoride values of the buccal and lingual or between the mesial and distal surface enamel layers was not significant. The mean fluoride contents of the buccal-lingual surface enamel layers of teeth with completely or incompletely developed roots were higher in both age groups as compared to the mesial-distal surfaces. There was a lower fluorapatite content in mesial-distal enamel surfaces.

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