Silver diamine fluoride
A liquid called SDF that is painted on a cavity to help slow or stop decay. The silver fights germs, and the fluoride helps harden the tooth.
During the visit
The dentist dries the tooth and uses a tiny brush to place the liquid. There is usually no drill or numbing shot. Your child may notice a bitter or metal taste.
After the visit
Follow the dentist’s eating advice and keep brushing. The tooth needs checks, and SDF may need to be applied again. A filling or crown may still be needed.
Good to know
SDF permanently turns decayed areas black. It does not fill a hole or treat an infection deep inside a tooth. Tell the dentist about silver allergies or mouth sores. In the U.S., its use to stop cavities is off-label, meaning this use is not the one listed in its FDA clearance.
Pediatric dentist-backed sources
This page is for learning, not for finding or treating a health problem. Your child’s dentist knows your child best.