Correlation between the Content and Distribution of Ca in Enamel of Deciduous Teeth and Caries Status

Purpose To study the content and distribution of Ca in enamel of deciduous teeth and its correlation with caries status in children. Methods Crown s cross sections from 38 deciduous mandibular central incisors were investigated by SEM and EDX. We compared the Ca content in different caries status groups, different positions, different depths, and analyzed the correlation between the Ca content and caries status with statistics. Results The Ca content decreased from outer layer, middle layer to inner layer in enamel,and there was a significant statistical difference between the former and the later two. There was a low negative correlation between the Ca content of enamel in mesial side,labial side and dft respectively. No statistical difference was found in the Ca content of enamel among three caries status groups. The distribution of Ca in normal enamel was asymmetric. The Ca content showed a decrease tendency from the outer layer to the inner layer in enamel. The Ca content of enamel has little correlation with caries status. Conclusions Difference of Ca content of enamel may not the major factor of cariogenesis in terms of the host.