fluorosis of esthetic concern, but the precision of these rough estimates is low.
Irish dental surgeon, Donal McAuley, wrote in the British Medical Journal: " Fifty per cent of our population has dental fluorosis.
For three quarters of a million people, dental fluorosis is of the " moderate to severe " degree.
So have Japan and India, where fluoride occurs naturally and skeletal fluorosis (thickening of bones) is prevalent.
This mild fluorosis is often undetectable except by a dental expert.