Whether or not the teeth are extracted for orthodontic treatment depends on the crowdedness of the teeth. If the crowdedness of the teeth is more obvious, the results achieved will generally be less than ideal if the teeth are straightened without extractions. If the teeth are not crowded, can also be corrected without extraction. 1. If the degree of overcrowding is obvious, the result will be unsatisfactory if the teeth are straightened directly without extraction. Moreover, if the teeth are barely straightened, it will be easy for them to recur after it is over. 2. If the teeth are slightly crowded, you can choose not to extract the teeth, such as the use of slice cutting and other methods to leave a gap to align the teeth. 3. If the teeth are not crowded, the teeth are usually corrected without extraction. Orthodontic extraction or not is recommended to go to the hospital to consult a professional doctor.