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1 College of Dentistry, Ohio State University, and Dental Division, City Department of Health, Columbus, Ohio
A total of 77 children aged 7 to 9 and 14 to 16 years were divided into experimental and control groups. Each child in the experimental groups received four topical applications of 2 per cent sodium fluoride, the first preceded by an oral prophylaxis. Each control received only an oral prophylaxis. Salivary lactobacillus counts taken before, and at intervals after, the treatments showed no consistent differences, and no changes were observed in the salivary lactobacillus counts of the experimental groups that were not equally true of the control groups.
Submitted on October 19, 1950
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