If you sustain an injury to your mouth, jaw or teeth in any form, it is essential to get yourself to a dentist sooner than later. It is vital to have your mouth and teeth assessed to check for any injuries you may have sustained and to help save your teeth from future problems. There are several issues that may happen to a tooth during an injury, including concussion (bruising of the gums and ligament), luxation (displacement of the tooth either outward or inward) and avulsion (loss of the tooth.) It is essential to know what to do in the case of a lost tooth from trauma.