1. If you have heart disease or liver disease, you can't pull out your teeth as long as you have symptoms of cardiac insufficiency. Tell the doctor before orthodontic tooth extraction is needed. Some patients cannot use anesthetics, which may lead to other diseases.

2, if there are patients with hemorrhagic diseases, it is best not to extract teeth. If the tooth is extracted, it will cause massive bleeding, systemic infection and life-threatening, especially for leukemia patients.

3. If a woman is in menstruation, pregnancy or lactation, she can't pull out her teeth. If orthodontics can't pull out her teeth, try not to. It may be complicated to pull out her teeth in the meantime.

4. If you drink alcohol before tooth extraction, you can't do strenuous exercise, which will lead to accidents during tooth extraction.