Bad dentition, such as crowded teeth, maxillary protrusion, mandibular protrusion and malocclusion, needs orthodontic treatment to improve the situation. Generally speaking, in orthodontics, first of all, we should take panoramic photos of the oral cavity and lateral photos of the skull, and design the correction plan according to the specific situation. It usually takes about 2 years to correct teeth. During this period, you should return to the clinic on time and adjust the strength and direction of correction according to the changes of teeth. You need to wear a corrective fixer in the later stage. Depending on the treatment plan and corrective equipment, the cost is different. It is recommended to go to a regular hospital.