Show 1417: Examining the Pros and Cons of Water Fluoridation

This week, we offer the first of a two-part series on water fluoridation. Tooth decay is uncomfortable. When it leads to periodontal disease and tooth loss, it can have a negative impact on cardiovascular and cognitive health, as well as quality of life. Fluoridation has been employed as a public health intervention to improve dental health. What is fluoride and how does it work? Our guest, Dr. Gary Slade, explains the mechanisms that help fluoride strengthen tooth enamel. In particular, it becomes incorporated into the crystalline structure of the enamel in places where it has been attacked by acid. The practice of adding fluoride to drinking water to prevent tooth decay has been controversial for some time. Why? What should we know about it?  Fluoridated water is the primary source through which we are exposed to fluoride. On the other hand, it is not the only source. Next week's guest points out that formula-fed infants get a much higher dose, relatively speaking, than adults if their formula is made with tap water. In addition, we are all exposed to fluoride from nonstick pans and stain-resistant fabrics, antidepressants and anesthetics and a host of other sources. Next week, Dr. Bruce Lanphear will explain why he thinks this is a problem.