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J Dent Res 36(5): 771-779, 1957
© 1957 International and American Associations for Dental Research
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REACTION OF TOOTH SURFACES WITH ONE PPM OF FLUORIDE AS SODIUM FLUORIDE

F. BRUDEVOLD 1, J. W. HEIN 1, J. F. BONNER 1, R. B. NEVIN 1, B. G. BIBBY 1, and H. C. HODGE 1

1 Eastman Dental Dispensary and University of Rochester, Rochester, N. Y.

1. A study has been made of the uptake by enamel surfaces of radioactive fluoride from sodium fluoride solutions containing 1 ppm of fluoride. The uptake varies in different teeth and different areas on the same tooth.

2. Brushing with water caused a rapid loss of fluoride during the first 3 minutes and decreasing loss thereafter. Brushing with abrasives removed most of the fluoride after 30 seconds, demonstrating that there was only a slight fluoride penetration into the enamel.

3. The rate of uptake was greatest during the first few minutes of exposure and decreased with time.

4. Pumiced, ground, or acid-etched surfaces showed greater uptake than intact surfaces.

5. Slightly demineralized areas, e.g., brown or white spots, showed greater uptake than sound enamel.

Submitted on December 15, 1956






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