Caries examinations of 251 children aged 12 to 14, from two Ohio towns that use water supplies with high contents of boron and strontium showed a mean DMFS score of 3.56 compared to a score of 5.54 in a control group of 338 children. Findings suggest that the significantly lower caries prevalence in the former group is related to the boron and strontium content of the water rather than a 0.2 ppm difference in the fluorine level.
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