This guidance has been withdrawn while it awaits confirmation by a registered dentist. Please consult a registered dentist for advice on this point.
If a baby tooth is knocked out, it should never be reinserted into the socket. Doing so can cause damage to the developing permanent tooth underneath. The focus of treatment for primary teeth is usually to ensure no infection occurs and to check if the surrounding tissues are healthy.
For a permanent tooth that has been knocked out, time is critical. You should hold the tooth by the crown (not the root), rinse it briefly with water if dirty, and try to place it back in the socket. If that is not possible, keep the tooth in a container of milk and see a dentist urgently.
Fractured or chipped teeth also require professional attention to protect the inner pulp from bacteria. A dentist can often repair the tooth using modern dental materials. Quick action and professional care are the best ways to save a child's tooth and prevent long-term complications following an injury.