Fluoride is it necessary?

I think fluoride is an important part of  having healthy teeth.  Fluoride is a mineral that is naturally present in almost all foods, water supplies and many dental products such as toothpaste and certain mouth rinses.  The American Dental Association, The World Health Organization and the American Medical Association have endorsed the use of fluoride in water supplies.  Multiple studies have shown that when fluoride is added to a water supply, tooth decay decreases, fluoride acts in two ways: topically and systemically.  Topical fluorides strengthen teeth that are already erupted in the mouth.   The fluoride is absorbed  into the outer surface of the tooth, making it more resistant to decay.  Systemic fluorides are ingested through food and water and are used by teeth which are developing.  Children between 6months and 16 years can benefit from fluoride.

This is important, too much fluoride can cause a condition called fluorosis.  Dental fluorosis  is caused by a child receiving too much fluoride during tooth development.  The critical period is between 1 and 4 years old.  Children over age 8 are not at risk.