ECC risk increases because some teeth erupt early and are least protected by which factor?

• A. Fluoride
• B. Saliva
• C. Enamel
• D. Pulp

Answer: (B)

Saliva provides key protection against caries by buffering acids, washing away sugars, and supplying minerals for remineralization, along with antimicrobial factors. When teeth erupt early, they spend more time in the oral environment before protective habits and fluoride exposure are fully established, and the enamel is still adapting to the mouth’s conditions. This makes these teeth more vulnerable because the salivary defenses aren’t yet able to offset the cariogenic challenges as effectively, increasing ECC risk.

Fluoride is a strong protective factor, enamel is a physical barrier but not the dynamic protective agent discussed here, and pulp isn’t a protective factor for caries prevention.