Relationship between Caries Status and Fluoride Content in the Enamel of Deciduous Teeth Detected by Electron Probe Microanalysis

Objective: To investigate the relationship between the content of fluoride in deciduous enamel and caries status in children.Methods: 35 lower deciduous central incisors were collected from the children aged 5 to 7,and the fluoride contents and distribution in the enamel of these samples were detected by electron probe microanalysiser(EMPA).The values of fluoride content in different depth were compared between caries free group and caries group,and the correlation between fluoride content and caries status was analyzed by SPSS software.Results: The fluoride content decreased significantly from the enamel surface to the inside,but there were no statistical differences between caries free group and caries group,between labial and lingual sides of the deciduous teeth(P0.05).No correlation was found between fluoride content and dft,CSI.Conclusion: Fluoride content was different in different depths,and there was no correlation between fluoride content and caries status in this research.