streptococcus mutans and dental caries in urban and rural schoolchildren in thailand.two groups of thai schoolchildren aged 11-13 yr were examined for dental caries, dental fluorosis and streptococcus mutans. one hundred children lived in an urban district, bangkok, and 71 children in a rural district, petchaboon. saliva samples were analyzed for s. mutans by the spatula method. the fluoride content of the drinking waters was also determined. the prevalence of caries, diagnosed according to who, was 89% in bangkok and 18% in the rural district. mean dmft was 3.46 and 0.38 respec ...19863466747
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