CADTH is committed to supporting Canada’s health care decision-makers through this challenging and uncertain time.
For evidence, tools, and resources related to COVID-19, visit our COVID-19 Evidence Portal.

 

Begin main content

Community Water Fluoridation Programs: Clinical Effectiveness and Safety

Last updated: March 30, 2020
Project Number: RA1097-000
Product Line: Rapid Response
Research Type: Drug
Report Type: Reference List
Result type: Report

Question

  1. What is the effectiveness of community water fluoridation (fluoride level between 0.4 ppm and 1.5 ppm) compared with non-fluoridated drinking water (fluoride level < 0.4 ppm) in the prevention of dental caries in children and adults?
  2. What are the effects of community water fluoridation cessation (fluoride level < 0.4 ppm) on dental caries in children and adults compared with continued community water fluoridation (fluoride level between 0.4 ppm and 1.5 ppm), the period before cessation of water fluoridation (fluoride level between 0.4 ppm and 1.5 ppm), or nonfluorinated communities (fluoride level < 0.4 ppm)?
  3. What are the negative effects of community water fluoridation (at a given fluoride level) compared with non-fluoridated drinking water (fluoride level < 0.4 ppm) or fluoridation at different levels on human health outcomes?

Key Message

Three systematic reviews with meta-analyses and 21 non-randomized studies were identified regarding the clinical effectiveness of community water fluoridation in the prevention of dental caries, the effects of community water fluoridation cessation on dental carries, and the negative effects of community water fluoridation on human health outcomes.​