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.

When Tristen Boyer recently had a couple of cavities filled, her dentist suggested she get fluoride treatment afterward ... which involves applying a varnish, gel or foam directly to the teeth ...

(AP) — When Tristen Boyer recently had a couple of cavities filled, her dentist suggested she get fluoride treatment ... which involves applying a varnish, gel or foam directly to the teeth ...