Tooth dislocation refers to the change of the original position of the tooth in the mouth. Different types of dislocation show different symptoms and are divided into the following cases: 1, partial tooth dislocation: the dislocated tooth is elongated compared to other surrounding teeth and is prone to loosening; 2, lateral tooth displacement: the displaced tooth is near the lip direction called labial displacement. It is expressed as tooth convexity; the displaced tooth is near the lingual side, which is expressed as tooth inward; 3, tooth embedding: the overall tooth becomes shorter than other surrounding teeth after wrong entry; 4, tooth completely dislodged: the whole tooth is out of the mouth.