An interesting US perspective on Xylitol and Fluoride.

"In the US we have an epidemic of cavities in children’s teeth, but the facts are that fluoride has no power to prevent cavities. Cavities are caused by bacteria that erode holes in teeth, and fluoride does nothing to help us fight these bacteria (except at dangerously strong concentrations, when it works as a poison to kill them).

The usefulness of fluoride is to promote tooth repair, after damage has been done. If enamel crystals re-grow in the presence of fluoride, they become bigger, smoother, and more perfect, than enamel formed without fluoride. Big crystals have the opportunity to connect with each other, providing a way to bridge gaps and heal holes in the tooth’s outer layer. We know that a smoother outer layer will reflect light, to make teeth shinier and appear whiter. More importantly, a strong outer layer will better resist future attacks by mouth acidity.

Enamel repair and re-building happens every time a weak solution of fluoride is in contact with damaged tooth enamel. There is no reason to drink fluoride, since the benefits are from the interaction of fluoride with the tooth surface. Toothpaste and rinses offer these benefits without the risks that come from ingesting a toxic kind of fluoride, or too much of it.

Most fluoride in tap water is a silico-aluminum fluoride compound, a product of industry that has never been approved by the FDA for human consumption. If someone regularly drinks a lot of water, they may ingest too much of this, and it can concentrate in bones to make them brittle. Fluoride toxicity is a real concern for young children or if you have damaged kidneys or delicate bones. Formula milk has fluoride in the powder and so it should never be mixed with fluoridated tap water. The American Academy of Pediatric Dentistry warns fluoride-free bottled water should always be used to mix formula milk. In the same way, fluoridated toothpaste should not be recommended for small children, since they usually swallow paste. Xylitol granular crystals on a toothbrush would be a much better alternative to toothpaste for young children. (The only time we recommend a tiny amount of fluoridated paste for a young child is if they have cavities).

A study from Environmental Health Perspectives in July this year showed ingesting high levels of fluoride may harm children’s brain development. The study was a systematic review and showed children in high fluoride areas had lower IQ scores than peers in low fluoride areas. These studies were in China where fluoride levels are extremely high (as a contaminant from industry). You cannot extrapolate this study to fluoridation in the US, but neither should you believe that a lack of fluoride causes tooth decay.

A comparison of the oral health benefits of xylitol and fluoride


The synergistic effects of Xylitol & Dilute Sodium Fluoride

The effect of xylitol and fluoride is synergistic. This means that when you use xylitol it is beneficial, and fluoride can also be beneficial (if you have damaged teeth). When you use these products together for oral health, the effects are greater than you expect by using each product alone.

The following picture shows the cavity-healing effects of using both xylitol and fluoride. The complete study from the Journal of Oral Science can be found HERE. One of the conclusions of this specific study showed that remineralization is accelerated when xylitol is used with fluoride."


Reprinted from Dr  Ellie Phillips Blog, Zellies, October 2012