Q: Is tooth decay a serious problem in Sonoma County?
A: According to the Sonoma County Smile Survey 2009, about 1 in 6 kindergarteners (16%) and 1 in 6 third graders (17%) had untreated tooth decay. Also, about 2 in 3 Latino kindergartners had tooth decay (65%) as compared to 1 in 3 (32%) of their White counterparts. In fact, Latino children were almost 4 times as likely as white children to need urgent dental treatment. The survey examined the oral health status of children in "Higher Income" schools (where less than 25% of students are eligible for free lunch) as compared to "Lower Income" schools (at least 75% of students eligible for free lunch). Students from lower income schools were more than twice as likely as those from higher income ones to have experienced tooth decay. Approximately 1 in 3 students from "Higher Income" school experienced tooth decay (30.6%) compared with 2 in 3 (67.3%) of students in "Lower Income" schools.
Q: What is fluoride?
A: Fluoride is a naturally occurring mineral present in drinking water. Fluoride is naturally present in all community water systems to some level, but is usually insufficient to help prevent tooth decay. It was the difference in tooth decay between communities with different levels of fluoride naturally present in the water that lead to the understanding of its benefits.
Q: How does fluoride reduce tooth decay?
A: When present in water at optimal levels, fluoride has been shown to prevent tooth decay in people of all ages. It is especially important for children, for whom it makes the teeth more resistant to decay. A major risk for tooth loss in older adults is cavities, especially root caries. Root caries most commonly affect the molar teeth. Fluoride has been shown to undo newly formed cavities and prevent root caries in adults.
Q: What is community water fluoridation and why do we fluoridate water?
A: Community water fluoridation refers to addition of fluoride to a water supply. While all drinking water contains some fluoride, water fluoridation adjusts this naturally occurring fluoride level to the optimum level for preventing tooth decay. The optimum concentration of fluoride in water is 0.7 mg/l. Fluoride does not change the taste, smell, or appearance of the water. It is a safe, effective, and economical way to improve dental health for the entire community. No significant negative health consequences have been identified when fluoride is added at recommended levels.
Q: Do adults, as well as children, benefit from water fluoridation?
A: Yes, water fluoridation provides dental health benefits for both children and adults.
Q: Is there a difference in effectiveness between naturally occurring fluoridated water and water that has fluoride added to it?
A: No. The same fluoride ion is present in naturally occurring fluoride and fluoride drinking water additives. Also, fluoride metabolism is not affected by different chemical compounds nor are they affected by whether fluoride is present naturally or artificially.
Q: Do water filters remove fluoride? Will using a home water filtration system take the fluoride out of my homes' water?
A: Most home point-of-use treatment systems installed at single faucets use activated carbon filtration, which does not remove fluoride. Reverse osmosis point-of-use devices can effectively remove fluoride although the amount may vary given individual circumstances.
Q: Does bottled water contain fluoride?
A: Some bottled waters contain fluoride and some do not. Some water is bottled directly from fluoridated community tap water and resold to consumers. Fluoride can occur naturally in source waters used for bottling or be added. The U.S. Food and Drug Administration does not require bottlers to list the fluoride content in a bottle of water, but does require fluoride additives to be listed. Contact the manufacturer to ask about the fluoride content of a particular brand of bottled water.
Q: What is enamel fluorosis and when does it occur?
A: Enamel fluorosis is a hypo mineralization of the enamel surface of the tooth that develops during tooth formation. It may range from barely noticeable white spots to pitting and staining. It can occur only during tooth development. Only children 8 years old and younger are at risk, as this is the time when permanent teeth are developing under the gums. Severe enamel fluorosis can occur when young children consume excess fluoride, from any source, during critical periods of tooth development.
Q: What if my child has been receiving fluoride drops or tablets?
A: Only children living in non-fluoridated areas should use prescription dietary fluoride supplements between the ages of six months to 16 years of age. When the water is fluoridated, there is no need to continue using fluoride drops or tablets. Please consult with your healthcare provider or dentist before starting or stopping the use of fluoride drops, or other supplements.
Q: Should my family continue brushing with fluoridated toothpaste?
A: Yes. For most people (children over six years of age, adolescents, and adults) brushing at least twice a day with fluoride toothpaste is recommended. Some simple recommendations are advised to reduce the risk of enamel fluorosis among children aged 6 years and younger:
- Supervise brushing to discourage swallowing toothpaste.
- Place only a small pea-size amount of fluoride toothpaste on your child's toothbrush.
- Seek advice from a dentist or other health care professional before introducing fluoride toothpaste to children less than 2 years of age.
Q: What are the guidelines for breast-fed infants?
A: Breastfeeding is the most complete form of nutrition for infants. Breast milk has low concentration of fluoride and does not contribute to enamel fluorosis (a defect in the tooth enamel caused by exposure to high concentrations of fluoride during tooth development).
Q: Is it safe to use fluoridated water to mix infant formula?
A: Yes, you can use fluoridated water for preparing infant formula. However, if your child is exclusively consuming infant formula reconstituted with fluoridated water, there may be an increased chance for mild dental fluorosis. To lessen this chance, parents can use low-fluoride bottled water some of the time to mix infant formula; these bottled waters are labeled as de-ionized, purified, demineralized, or distilled.
Q: What is the effect of fluoridation on people with Chronic Kidney Disease (CKD)?
A: According to the National Kidney Foundation, fluoridation presents no health risks for people with mild renal disease. However, those individuals with end stage renal disease might be at risk for skeletal fluorosis, although there are limited studies addressing this issue. Fluoride concentrations in dialysis machines should follow established guidelines.
Q: Can my pets drink fluoridated water?
A: Yes. Research findings do not support an association between water fluoridation and negative health effects on plants and animals.
Q: What is the effect of water fluoridation on the environment?
A: Scientists have found a lack of evidence to show an association between water fluoridation and a negative impact on people, plants, or animals.
Q: Which health organizations support and endorse water fluoridation?
A: American Dental Association (ADA)
California Dental Association (CDA)
Centers for Disease Control and Prevention (CDC)
American Medical Association (AMA)
American Academy of Pediatrics (AAP)
U.S. Surgeon General
National Institute of Dental & Craniofacial Research (NIDCR)
World Health organization (WHO)
Q: What is the cost effectiveness of water fluoridation?
A: The economic analysis found that for larger communities of more than 20,000 people where it costs about 72 cents (in 1999 dollars) per person per year to fluoridate the water, every $1 invested in this preventive measure yields approximately $38 savings in dental treatment costs. In Sonoma County, the average estimated cost of one filling ($146) would provide fluoridation for a family of four over 50 years.
Q: How can I learn more about water fluoridation?
A: Visit these websites:
Centers for Disease Control and Prevention
American Dental Association