Fluorine Content of Superficial Enamel Layer and Its Correlation with the Fluorine Content of Saliva, Tooth Age, and DMFT Count

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Abstract
The superficial enamel layer of 30 extracted human permanent teeth of different eruption periods and 27 saliva samples were analyzed for fluorine. The fluorine content in the superficial enamel samples varied between 100 and 1000 ppm and in the saliva samples between 0.04 and 0.46 ppm. No significant correlations between fluorine content of the superficial enamel and fluorine content in saliva, on the one hand, and dental caries experience, on the other, were established. The correlation between fluorine content in the superficial enamel and tooth age after eruption was statistically significant.