The Evanston Dental Caries Study

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Abstract
Previous reports of the Evanston Dental Caries Study have indicated no reduction attributed to fluorine in the caries experience of the deciduous teeth of the 6-, 7- and 8-yr.-old children. This is thought to be due to the fact that all of the deciduous teeth were developed and were present in the mouth for some time prior to the introduction of NaF in the communal water supply. The recent analysis of the data collected from the 12-, 13- and 14-yr.-old children indicates a reduction in the DMF permanent teeth approx. 12.19%. The pre-carious lesions of the permanent teeth were reduced by 55.7% for the 12-yr.-olds, 38.8% for the 13-yr.-olds, and 33.3% for the 14-yr.-olds. The total number of children examined (1769) for this age group indicated a 73.21% increase of those who are immune clinically and roentgenographically to dental caries.
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