Which type of fluoride is most commonly used in public water systems?

Sodium fluoride is the type of fluoride most commonly used in public water systems due to its effectiveness in preventing dental caries (cavities). It is soluble in water, allowing it to easily dissolve and disperse throughout the water supply, ensuring that individuals consuming the water receive the dental health benefits associated with fluoride.

When added to drinking water at appropriate levels, sodium fluoride helps to remineralize enamel and make teeth more resistant to acid attacks from bacteria in the mouth. Public health initiatives have widely adopted its use as a preventive measure against tooth decay, contributing significantly to overall dental health in communities.

In contrast, other types of fluoride, such as calcium fluoride and stannous fluoride, are less commonly used in water fluoridation programs. Calcium fluoride, while beneficial, is less soluble and doesn't dissolve as effectively, limiting its application in water systems. Stannous fluoride is primarily used in dental products like toothpaste, given its antibacterial properties and effectiveness but is not utilized for mass water fluoridation. Acidulated phosphate fluoride is primarily a professional topical application used in dental offices and is not used for public water fluoridation.