Salt fluoridation and oral health

Area of Science:

• Public Health
• Dental Caries Prevention
• Community Health Programs

Background:

• The historical success of iodine fortification in salt for goiter prevention in Switzerland since 1922.
• The established caries-protective effects of fluorides by 1945, leading to exploration of alternative delivery methods beyond water fluoridation.

Observation:

• The introduction of fluoridated salt in Switzerland in 1956, with studies confirming its caries-inhibiting effects in the 1970s.
• Official authorization for salt fluoridation in Europe occurred between 1980-1982.

Findings:

• High adoption rates of fluoridated salt in Switzerland (85%) and Germany (67%).
• Extensive salt fluoridation programs in Latin America, covering over 100 million people with 90-99% coverage in several countries.
• Salt fluoridation demonstrates significant cariostatic potential, comparable to water fluoridation, achieving caries reductions up to 50%.

Implications:

• Salt fluoridation is identified as the most cost-effective method for improving oral health, with costs as low as €0.02-€0.05 per capita annually.
• The method disproportionately benefits children and adults from lower socioeconomic strata who experience higher rates of untreated caries.
• Billions globally could benefit from widespread implementation of salt fluoridation for caries prevention.