Teeth out of shape is often caused by abnormal alignment of the teeth, generally need orthodontic treatment, so that the teeth are normally aligned in the dental arch, if necessary, assisted by periodontal treatment. 1. Teeth out of shape can be caused by deep overcrowding or overcrowding of the teeth. Orthodontic treatment is usually carried out clinically to retract the anterior teeth with the use of orthodontic appliances or make the teeth aligned in the normal position, and extractions to reduce the number of teeth or expanding the arch are also required if necessary. 2. The teeth may also be aggressive periodontitis, due to alveolar bone resorption will make the teeth gradually shifted, fan-shaped arrangement, the need for periodontal treatment, if necessary, to do flap surgery to control periodontal inflammation, to be eliminated after the elimination of inflammation for orthodontics. Teeth out of shape not only affects aesthetics and oral health, it is recommended to seek medical treatment as soon as possible.