1, individual tooth dislocation, mainly manifested as labial dislocation, buccal dislocation, lingual dislocation, mesial dislocation, distal dislocation, tooth rotation and other clinical malocclusions;
2, abnormal dental arch, usually manifested as crowded dentition, scattered dentition in the gap, narrow dental arch;
3. The relative position of dental arch, jaw and craniofacial is abnormal, which is usually manifested in the situation that the front teeth are reversed, the front teeth are deeply overlapped, the front teeth are deeply overlapped, the front teeth are opened and the rear teeth are locked.
If there is deformity, the degree of deformity of the patient should be determined first, and the routine preoperative examination should be carried out, including the auxiliary examination such as taking the model and taking the film first, and the treatment plan should be determined according to the model and film combined with the oral condition of the patient. If the patient only has a simple tooth problem, it can be fixed and corrected by orthodontics and orthodontic braces. Each tooth is bonded with brackets, bands or buccal tubes, so that the teeth are arranged neatly, thus solving the problem of uneven tooth arrangement.