Dental extraction is the most common treatment technique in dentistry. Because the tooth extraction can cause local tissue damage, causing bleeding, swelling, pain and other reactions, it can also lead to fluctuations in blood pressure, body temperature and pulse, so it must be treated with caution. Especially for patients with cardiovascular disease and blood diseases, otherwise it will bring serious consequences. Loss of teeth can cause atrophy of the alveolar bone, displacement or elongation of adjacent teeth and jaw teeth, resulting in chewing disorders. The loss of the anterior teeth directly affects the pronunciation and appearance. Premature loss of deciduous teeth in children can cause malformation of the teeth. Therefore, the indications for tooth extraction must be strictly controlled. Only when the teeth have adverse effects on health, and cannot be treated with effective methods, the removal is considered. ...