THE EVANSTON DENTAL CARIES STUDY

X. THE CARIES EXPERIENCE RATES OF 6, 7, AND 8-YEAR-OLD CHILDREN WITH PROGRESSIVELY INCREASING PERIODS OF EXPOSURE TO ARTIFICIALLY FLUORIDATED WATER

¹ Walter G. Zoller Memorial Dental Clinic, University of Chicago, Chicago, Ill.

The dental caries experience rates of four groups of children exposed to an artificially fluoridated water for various lengths of time has been presented. The last group (1951) was exposed to the water for the longest period of time, 47 to 58 months. The age range of that group at the time of fluoridation of the water was from 9 to 55 months. Although all the deciduous teeth were calcified eruption was not entirely completed at that time. The changes in the dental caries rate of the deciduous dentition for the 1951 group were not considered significant when compared to the 1946 or base line group. The permanent teeth dental caries experience rate of the combined 1951 group of 6 to 8 year old children was 46.42 per cent lower when compared to the base line group.

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