In case of trauma, there might be complete displacement of tooth from its socket. In those scenario, try to keep calm as the tooth can be reimplanted if proper precautions are taken. Avoid touching the root part of tooth. The recommended storage medium for the knocked out tooth is the patient's own saliva, that is placing the tooth under tongue or in cheek. Make sure patient is not young enough to swallow the tooth. Also glass of milk can be used as storage medium. Seek emergency dental treatment immediately.