Knocking out a permanent tooth is serious for your child and quick reaction and timing is critical. Make sure you retrieve the tooth, and only hold it by the crown or top and not the root end. You should rinse off the tooth but don’t try to clean it and don’t handle it more than necessary. Next, reinsert the tooth in the socket and hold it in place using a clean piece of gauze or cloth. If reinserting the tooth isn’t possible, put it in a cup of milk or water and see us immediately for an appointment.