The Evanston Dental Caries Study

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Abstract
This is the preliminary report of the biological findings of the Dental Caries Study, Evanston, Illinois. The problems being investigated are: the amount of fluorine ingested in the diet; the F content of dental tissue, bones (crest of ilium), and fetuses (femurs, mandible, maxilla, and tooth buds); the control of fluorine level (1 p.p.m.) in the potable water supply. The F contents of foods analyzed were: soups, 0.4 p.p.m. to 2.8 p.p.m.; rice, 1.0 to 2.6 p.p.m.; Pablum, 11.2 p.p.m.; Pabina, 5.3 p.p.m.; Spry, 2.1 p.p.m.; oatmeal, 1.4 p.p.m. The F content of sound teeth varied from 0.0104% to 0.0287%; with an avg. of 0.0202%; for carious teeth it was 0.0045% to 0.0270% with an avg. of 0.0133% F. The bones contained an avg. of 0.0376% F. The avg. F content of the fetuses was: left and right femur, 20 p.p.m.; mandible and maxilla, 19 p.p.m.; tooth buds 12.5 p.p.m. No difficulties were encountered in maintaining a level of 1 p.p.m. F in the potable water supply.

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