Fluorides - mode of action and recommendations for use

Area of Science:

• Dental research
• Public health dentistry
• Cariology

Background:

• Industrialized nations have observed a significant decline in dental caries over recent decades.
• The widespread use of fluorides, particularly in topical applications, is strongly associated with this caries reduction.
• Fluorapatite has limited protective potential, while dissolved fluoride ions are crucial for enamel's chemical defense.

Purpose of the Study:

• To evaluate the role of fluoride in the observed decline of dental caries.
• To understand the mechanisms by which fluoride exerts its caries-protective effects.
• To confirm the efficacy of regular topical fluoride application in preventing tooth decay.

Main Methods:

• Review of existing literature and epidemiological data on caries trends in industrialized countries.
• Analysis of the chemical and biological mechanisms of fluoride action on tooth enamel.
• Correlation of the timing of widespread fluoride use with observed caries prevalence changes.

Main Results:

• A strong correlation exists between the increased use of topical fluoride, primarily fluoridated toothpastes, and the decrease in caries rates.
• Dissolved fluoride ions in the oral environment are effective in both remineralization of early lesions and inhibition of demineralization.
• The caries-protective effect is attributed to the action of free fluoride ions rather than the fluorapatite mineral itself.

Conclusions:

• The decline in dental caries in industrialized countries is largely attributable to the regular application of fluorides.
• Topical fluoride, especially through toothpastes, plays a primary role in caries prevention by modulating enamel demineralization and remineralization.
• Consistent fluoride exposure is a justified and effective strategy for inhibiting caries development.