The number of teeth that can be extracted at one time is determined by considering the size of the extraction trauma, the patient’s general health condition, and the patient’s request for extraction time, etc. Generally, this is considered as follows: 1. It is usually considered that the upper and lower teeth of the same side can be extracted at one time, so that the other side can be relatively healthy and can eat without affecting the diet. 2. For the extraction of wisdom teeth, it is generally recommended that the upper and lower wisdom teeth of the same side can be extracted at one time. 3. If you choose to be hospitalized for extraction, you can also extract more teeth at one time, because post-operative care and post-operative medication are relatively safer in case of hospitalization. Overall, it is recommended to extract 1-2 teeth at a time according to the size of the trauma, and 2-4 teeth at a time for very small trauma and serious periodontal disease, etc. It is also recommended to extract one area of teeth at a time.