Incisors generally refers to the maxillary incisors, maxillary incisors protrusion if the teeth alignment abnormalities caused by orthodontic treatment, if the jaw development abnormalities caused by orthodontic orthognathic joint treatment, specific as follows. 1. Abnormal teeth alignment: by wearing orthodontic appliances, the maxillary incisors can be retracted, and then the upper and lower teeth can be aligned, so that the front teeth can form a normal overlay and cover relationship, and the premolars can be extracted if necessary to provide space for the maxillary incisors to retract. 2. Abnormal development of jaws: Usually, orthodontics and orthognathic surgery are needed to adjust the shape of the maxilla through surgery, and then orthodontics can be used to make the maxillary incisors reach a reasonable position in the jaws, so as to achieve a normal occlusal contact relationship. It is recommended to visit a regular hospital to receive professional treatment.