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Related Experiment Videos

Effectiveness of water fluoridation.

E Newbrun1

  • 1Department of Stomatology, University of California, School of Dentistry, San Francisco 94143-0512.

Journal of Public Health Dentistry
|January 1, 1989
PubMed
Summary
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Communal water fluoridation significantly reduces dental caries across all age groups, with the greatest benefits seen in children. However, accurately measuring its effectiveness is increasingly challenging due to population mobility and widespread use of other fluoride sources.

Area of Science:

  • Public Health
  • Dental Epidemiology
  • Preventive Dentistry

Background:

  • Dental caries remains a significant public health concern globally.
  • Water fluoridation has been a cornerstone of community-based caries prevention for decades.
  • Assessing the precise impact of water fluoridation requires careful consideration of confounding factors.

Purpose of the Study:

  • To review the current evidence on the efficacy of community water fluoridation in reducing dental caries prevalence.
  • To analyze caries reduction across different age groups (deciduous, mixed, adolescent, adult, and senior dentition).
  • To discuss challenges in accurately measuring water fluoridation's effectiveness in contemporary populations.

Main Methods:

  • Systematic review of caries prevalence data from fluoridated and nonfluoridated communities.

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  • Inclusion of studies from the United States, Australia, Britain, Canada, Ireland, and New Zealand.
  • Analysis focused on recent surveys from the last decade.

    • Main Results:

    • Water fluoridation demonstrates significant caries reduction across all age groups: 30-60% in deciduous dentition, 20-40% in mixed dentition, and 15-35% in adolescents, adults, and seniors.
    • Consistent and substantial lower caries prevalence observed in fluoridated communities for all age cohorts.
    • Challenges in accurate efficacy measurement due to high geographic mobility and widespread use of other fluoride products.

    Conclusions:

    • Community water fluoridation remains an effective public health intervention for reducing dental caries.
    • Accurate assessment necessitates including only long-term residents to mitigate confounding factors.
    • The overall effectiveness of water fluoridation is perceived to be decreasing as other fluoride sources become more prevalent.