Contact your dentist, or an emergency dentist immediately.
Retrieve the tooth, hold by the crown (avoid touching the root area) and gently rinse under the cold tap for about 10 seconds to remove any dirt.
Do not scrub or remove any of the attached tissue.
Try to reposition the tooth correctly. Do not force into place. Bite on a clean cloth or tissue to help hold in place. For best results, re-implantation should be done within 5 – 10 minutes.
If this is not possible, place the tooth in a suitable storage container with milk or preferably a saline solution.
If possible it can be transported in the mouth (keeping it between the molars and the inside of the cheek). If the patient is very young, this is not advisable; he/she could swallow the tooth. You could get the patient to spit into a small container and place the tooth in this.