Abstract
Recently, the phenomenon of mother-to-child infection of Streptococcus mutans has been reported. However, there are few reports on the relationships regarding caries risk factors between the mother and child. Therefore, we examined the relationships between mothers and their children concerning individual caries risk factors. Furthermore, caries risk factors in mothers that influence those in their children were analyzed. At one kindergarten in Kitakyushu-city, we carried out a questionnaire survey regarding lifestyles and child-care environments, dental checkups and caries risk tests for children and their mothers. There results were analyzed by logistic regression analysis. The results showed that for individual caries risk factors, there were relationships between mothers and children in the DMFT (dft), in terms of the ratio of Streptococcus mutans and in the total caries risk score. The ratio of Streptococcus mutans affected the caries risk factors of children. From these results, it is considered that the caries risk of children is affected by the oral condition of their mothers.
