Posts for tag: fluoride
For over half a century now, community water systems have been adding fluoride to drinking water to help reduce the risk of tooth decay. Numerous long-term studies have demonstrated the soundness of this practice, prompting the U.S. Centers for Disease Control to call water fluoridation one of the ten most effective public health measures of the 20th Century.
In the 1960s, after years of study into the teeth-strengthening effects of fluoride, the U.S. Public Health Service recommended that drinking water utilities add fluoride at a rate of between 0.7 and 1.20 milligrams per liter (mg/L) or parts per million (ppm) of water. This recommendation held fast until 2015 when the service changed the recommendation to no more than 0.7 mg/L.
Why the change to guidelines that had been in place for over fifty years? The revision was in response to an increasing occurrence of dental fluorosis. This condition happens when the teeth absorb more fluoride than necessary, leading to discoloration of the surface enamel, creating effects like small white spots or brownish “mottling.”
Dental fluorosis is the only known health condition caused by fluoride. As such, it doesn't damage the tooth itself, and is mainly a cosmetic problem. But it can still be avoided if fluoride intake is kept at moderate levels.
The original recommendation was sound science when first introduced. Since then, though, the prevalence of fluoride in everyday life has grown, with the chemical commonly found in dental care products like toothpastes or mouthrinses, as well as many processed foods and beverages and even infant formula. Our society's overall intake of fluoride has been growing as a result.
The new recommendation came after several years of research to verify water fluoridation levels of 0.7 mg/L would still be effective in the fight against tooth decay while lowering the risk of dental fluorosis. With this adjustment, this important and safe measure for keeping your family's teeth protected against disease is safer than ever.
It’s indisputable that fluoride has revolutionized dental care. Decades of research have overwhelming shown this natural, enamel-strengthening chemical has decreased tooth decay.
Too much fluoride, though, can cause enamel fluorosis, a permanent staining of tooth enamel. In its mildest form, the teeth develop faint whitish streaks; in more severe cases, the staining is noticeably darker and the teeth appear pitted. The teeth themselves aren’t damaged, but the unsightly staining could require cosmetic treatment. Children under age 9 (when permanent teeth enamel matures) are especially at risk of fluorosis due to over-fluoridation.
Because of fluoride’s prevalence in hygiene products and many drinking water supplies, it’s not always easy to know if your child is receiving too much. There are two areas, though, that bear watching.
First, you should limit the serving quantity of fluoride hygiene products, particularly toothpaste. Children tend to swallow rather than spit out toothpaste after brushing, so they ingest more fluoride. We recommend a small “smear” of toothpaste on the brush for children under two, and a pea-sized amount for children two to four.
The other concern is your drinking water. Three-quarters of America’s water systems add fluoride, usually to a recommended level of 0.70 PPM (parts per million). To know if your water supply adds fluoride and at what levels, you can contact your local water utility or health department, or check the Center for Disease Control’s website for their “My Water’s Fluoride” program (https://apps.nccd.cdc.gov/MWF/Index.asp). This site will have information if your water system participates in the program.
If your area exceeds recommended levels or is at high risk for fluorosis, we recommend reducing the use of tap water in infant formula. Besides breast-feeding (human breast milk is low in fluoride), you can use either ready-to-feed formula, or mix powdered formula with water specifically labeled “de-ionized,” “purified,” “de-mineralized,” or “distilled.”
One thing you should not do is eliminate your use of products containing fluoride — this may increase your child’s risk of tooth decay. The consequences of decay can be serious and have a life-long effect — and far outweigh the risks of fluorosis staining.
If you would like more information on fluoride and your infant, please contact us or schedule an appointment for a consultation. You can also learn more about this topic by reading the Dear Doctor magazine article “Tooth Development and Infant Formula.”