This study was performed by respected leading researchers in environmental neurotoxins. It was funded by $3 million in grants from the US National Institute of Environmental Health Sciences. It was published in the premier journal for environmental health after undergoing peer-review.
Understandably, this study cuts to the heart of the dental profession's support of fluoride to combat dental decay. But rather than a knee-jerk reaction to deny the importance of this study in the interests of teeth, perhaps dentists should take a more holistic perspective and consider the entire child, including his cognitive development. How many IQ points loss would you consider is worth one cavity prevented???