Dentists and hygienists often propose fluoride treatments to patients in the dental chair to prevent cavities and strengthen teeth. But the relatively simple procedure — which involves applying a varn ...

When Tristen Boyer recently had a couple of cavities filled, her dentist suggested she get fluoride treatment afterward. She has Crohn's disease, which puts her at increased risk for tooth decay.

Is fluoride treatment worth it? Fluoride treatments cost anywhere from around $25 to $55. Though many insurers cover the cost for kids, adults generally pay out of pocket.

Dentist Alexander Daniel, left, demonstrates fluoride treatment on resident Cameron Onken, right, at the Johns Hopkins Outpatient Center, Friday, Feb. 28, 2025, in Baltimore. When Tristen Boyer ...