Enhanced anticaries action from drinking water containing 5 ppm fluoride.

Area of Science:

• Public Health
• Pediatric Dentistry
• Fluoride Research

Background:

• Dental caries remains a significant public health issue among adolescents.
• Water fluoridation is a widely adopted strategy for caries prevention.
• Optimal fluoride concentrations for dental health are continuously researched.

Purpose of the Study:

• To evaluate the impact of varying water fluoride concentrations on dental caries experience in adolescent schoolchildren.
• To compare caries prevalence in communities with naturally high fluoride levels versus standard fluoridation.
• To assess the dose-response relationship between fluoride intake and caries reduction.

Main Methods:

• Cross-sectional study involving 1,878 adolescent schoolchildren across seven US cities.
• Water samples analyzed for fluoride concentration (deficient, 1-2 ppm, and ~5 ppm).
• Dental examinations recorded caries experience using DMF index (decayed, missing, or filled teeth).

Main Results:

• Fluoridated water communities showed significantly lower caries experience (38-83% fewer mean DMF) compared to fluoride-deficient Boston.
• Midland, Texas, with ~5 ppm fluoride, exhibited even lower caries rates than standard fluoridated areas.
• Approximately 50% of children in Midland had no dental caries, indicating substantial protection.

Conclusions:

• Higher concentrations of fluoride in drinking water offer greater protection against human dental caries.
• Naturally occurring fluoride levels around 5 ppm demonstrate superior caries prevention compared to standard fluoridation.
• While higher fluoride is beneficial for caries prevention, concentrations above 1-2 ppm risk unesthetic enamel fluorosis.