Rinse the mouth vigorously with warm salt water or use dental floss to dislodge trapped food or debris. DO NOT clean or handle the tooth unnecessarily. Try to reinsert it in its socket. Have the child hold the tooth in place by biting on a clean gauze or cloth. If you cannot reinsert the tooth, transport the tooth in a cup containing milk or water.
Time is a critical factor in saving the tooth.
If a broken appliance can be removed easily, take it out. If it cannot, cover the sharp or protruding portion with cotton balls, gauze or chewing gum. DO NOT remove it. Take the child to a dentist immediately. Loose or broken appliances that do not bother the child usually do not require emergency attention.