[efirman]

The effect of fluoride is in addition to the effect of toothpaste and other fluoride delivery modalities (25%). Even if that were not the case, prior to the adoption of other fluoridation modalities, fluoridation reduced cavities by as much as 65%. Additionally, for urban centers it costs less than a tube of toothpaste per person per year. Finally, it works without requiring a behavioral intervention - people naturally drink and eat. It is not considered one of the top ten public health interventions of the 20th century for nothing.