Systematic review of water fluoridation

Area of Science:

• Public Health
• Dental Research
• Preventive Medicine

Background:

• Dental caries remains a significant public health issue globally.
• Water fluoridation is a widely implemented public health measure for caries prevention.
• Assessing the safety and efficacy of water fluoridation is crucial for public health policy.

Purpose of the Study:

• To systematically review the evidence on the safety and efficacy of drinking water fluoridation.
• To evaluate the impact of water fluoridation on caries prevalence and potential adverse effects.

Main Methods:

• A comprehensive search of 25 electronic databases and the world wide web was conducted.
• Study validity was assessed, and data were independently extracted by two reviewers.
• Inclusion criteria focused on a hierarchy of evidence to ensure robust analysis.

Main Results:

• 214 studies of low to moderate quality indicated that water fluoridation reduces caries prevalence.
• A dose-dependent increase in dental fluorosis was observed, with an estimated 12.5% of people experiencing aesthetically concerning fluorosis at 1 ppm.
• No clear evidence of other adverse effects was found.

Conclusions:

• Water fluoridation demonstrates a beneficial reduction in dental caries.
• The increased prevalence of dental fluorosis must be considered alongside the caries reduction benefits.
• Further research may be needed to fully understand long-term safety profiles.