Abstract
Incremental caries scores were determined after 30 months in this study involving elementary school children who use acidulated phosphate-fluoride tablets containing 1 mg of fluoride either once or twice a day. Two groups of children initially in the first and second grades chewed, rinsed with, and swallowed an acidulated phosphate-fluoride tablet either once or twice a day in school. A control group of children followed the procedure once a day using a placebo tablet. An interim evaluation after 30 months showed that the children receiving two fluoride tablets daily had a significant reduction in incremental caries on teeth that were present on the base-line examination and that, thus, were exposed only posteruptively to the fluoride.
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