your permanent teeth is knocked out.
your knocked-out tooth may be in your mouth, on your lap, or on the ground. when you find it, pick it up, but try your best not to touch the tooth by the roots. try to stay calm.
as soon as possible, hold the tooth by the crown (the chewing surface, which is the part of the tooth that is farthest away from the gum) and rinse it gently by dipping it briefly in a bowl of warm water.
keep these important recommendations in mind: do not hold the tooth under running water, which can damage the roots. do not use soap or scrape away debris with 