When is fluoride applied during prophylaxis?

• A. Always.
• B. If indicated based on patient needs.
• C. Never.
• D. Only on elderly patients.

Answer: (B)

Fluoride is used during prophylaxis when there is a clear benefit for that patient, not as an automatic step for everyone. After cleaning, the clinician assesses caries risk and other factors that influence remineralization—such as past caries history, dietary sugar exposure, saliva flow, fluoride exposure from water or supplements, and age. If this assessment indicates a need for extra protection, a topical fluoride treatment is applied to help harden enamel and slow demineralization. If the patient isn’t at meaningful risk, fluoride may be omitted to avoid unnecessary exposure.

That’s why the best choice is to apply fluoride only when indicated based on patient needs. The other options fail because fluoride isn’t always indicated, it isn’t never used, and it isn’t limited to a specific age group like elderly patients.