The correlation between fluoride in drinking water and the reduction of caries has been shown not to exist. This graphic shows the decline in caries in fluoridated vs non-fluoridated countries:



In fact, cavity rates have dropped worldwide, regardless of whether or not the drinking water (or, in some countries, table salt) is fluoridated. However, fluoride has been shown to have negative health effects, including staining of the teeth and enamel brittleness:

A Quantitative Look at Fluorosis, Fluoride Exposure, and Intake in Children Using a Health Risk Assessment Approach

Does it make sense to continue fluoridation when there are not only no proven health benefits, but also proven health detriments?

And....discuss.