There is no harm in orthodontic tooth extraction. However, patients in the orthodontic process, diet will be restricted, the initial stage of correction may be painful, the need to extract teeth, etc., about 50%-60% of patients in the orthodontic process need to extract teeth to achieve results, but extraction of teeth orthodontic no harm, for the following reasons: 1, some patients may lead to temporary psychological deficiencies due to missing teeth, but will improve the appearance due to the reduction of teeth, so there is no harm from the aesthetic level; 2 The treatment plan will not affect the patient’s chewing function; 3. If the teeth are not aligned, resulting in lower quality of long-term brushing, which can easily cause periodontitis, gingivitis, tooth decay, loose teeth, etc., it is recommended to correct the teeth and better maintain oral hygiene.