Sometimes  tooth/teeth may come out of its socket due to trauma. This is called "Tooth Avulsion.

Avulsed tooth also can be saved if the patient comes early to a dentist. The success rate depends on:

• Type of extraoral storage (Is the tooth dry or moist?)
• Time of extraoral storage
• Is the PDL (Periodontal Ligament) seriously damaged?
• Stage of root development (open or closed apex)

The main aim for replantation of an avulsed tooth/teeth is to preserve the tooth.Integrity of the socket and it prevents resorption of alveolar bone. If the tooth is dry and extraoral storage time is more than 1 hour, then it has a negative impact on prognosis.

The patient needs to carry the avulsed tooth/teeth and visit a dentist. Common mediums where the tooth/teeth is kept are:

• Milk
• Saliva
• Normal Saline
• Hank's Balanced Salt Solution (HBSS) etc.

Good prognosis:

• Moist tooth
• Very less extraoral time
• Viable PDL tissue

Tetanus prophylaxis should be considered.

Treatment of the knocked-out tooth typically involves replanting the tooth and then stabilizing it with a splint.

The patient should come to the dentist for follow-up at a regular interval.

Treatment protocol may vary between a permanent tooth and deciduous tooth.