Tooth extraction, to us, is a common thing, and how many of us haven’t had a tooth extracted since we were kids! As we grow older, our teeth are less and less powerful, painful, loose and many other reasons finally lead us to choose to pull it. However, if the body suffers from some kind of disease or the body is in a special period of time to pull out the teeth, not only will aggravate the condition, serious will also be killed for this. First, cancer patients, cancer here refers to the oral and maxillofacial (head and neck) malignant tumors of the general term. Especially after radiation therapy, the affected teeth located in the irradiated area should be extracted with a cautious attitude. It is generally believed that teeth should not be extracted within 3-5 years after radiation therapy, otherwise it may lead to long-term non-healing of the extraction wound, or secondary septic infection and formation of radioactive osteomyelitis or radioactive osteonecrosis (maxilla and mandible). If teeth must be extracted, high-dose antibiotics should be given before and after surgery to control infection and minimize surgical injury to avoid possible secondary infection. Second, patients with systemic diseases, especially cardiovascular and cerebrovascular diseases. This group of people in the extraction of teeth often due to tension and pain and triggered arrhythmia, angina and other symptoms, and may even cause heart attack. If such patients must be extracted, they should take vasodilating drugs before extraction, and prepare nitroglycerin and other emergency drugs, agreed by the doctor before extraction. Third, patients with liver disease Some patients with liver disease (such as hepatitis, cirrhosis) lack of thromboplastin in the body. Such patients if the random extraction of teeth, often bleeding wound symptoms; individual patients will be very serious bleeding, and will cause infection. Fourth, blood disease patients Some blood diseases (such as hemophilia, thrombocytopenic purpura, leukemia, etc.) patients with poor coagulation mechanism. If the tooth is easily extracted, it will often lead to bleeding or infection of the wound, and individual patients may even have a life-threatening condition as a result. Therefore, patients with blood diseases should not pull out their teeth at will. Extraction of teeth during menstruation I am afraid that few dentists will ask you whether you are on your period before you have your teeth extracted, but you must know that you can’t have your teeth extracted during menstruation! Otherwise, not only will you bleed more when you have your teeth extracted, but you will also have a bloody taste in your mouth for a long time after the extraction, which will affect your appetite and lead to malnutrition during menstruation. This is because during menstruation, the endometrium releases more tissue-activating substances, activating the fibrinolytic enzymes in the blood into fibrinolytic enzymes with anticoagulant effects, while the number of platelets in the body is also reduced, so the body’s clotting ability to reduce the hemostasis time is prolonged. Pregnancy, breastfeeding tooth extraction Some people think that during pregnancy can not be extracted, because it may lead to miscarriage. However, a large number of clinical practice shows that the extraction of teeth in the third to seventh month of pregnancy is relatively safe, there is no adverse effect on pregnancy. In this period of extraction, should also pay attention to the following points: ① in the day before the extraction and the day of extraction, intramuscular injection of progesterone 10 mg. ② Adrenaline must not be added to the anesthetic for tooth extraction. ③ The anesthesia must be complete and the pain relief effect should be good. For patients with a history of habitual abortion or habitual preterm labor, tooth extraction is prohibited during pregnancy. Extraction of teeth during breastfeeding is completely allowed, and some people say that extraction of teeth during this period will interrupt or reduce milk secretion. This statement is not scientific. Clinical practice shows that there is no effect on milk secretion.