In orthodontic clinics, tooth extraction is a routine means used by orthodontic clinicians to correct some patients with severely misaligned teeth, and more than half of the patients often need tooth extraction to be corrected. However, in practice, some patients and parents often have doubts and misunderstandings about the need for tooth extraction for orthodontic treatment. Often encounter patients and parents ask. 1, what about the gap after tooth extraction, can it be closed, do I need a veneer? 2.Will tooth extraction cause tooth loosening, and will the teeth fall out early in old age. 3.Can you extract only one tooth, or only the upper jaw. 4, fear of affecting the nerve, extraction pain and dare not pull teeth. To these patients worried about the problem, we have to first look at what is the purpose of tooth extraction? The purpose of tooth extraction is to lift the crowded teeth, reduce the protrusion of the front teeth to improve the shape of the face. Orthodontic treatment is actually through the force “orthodontic force” on the teeth to re-arrange, and in the process of re-arrangement often need to have enough space to align the crowded teeth, or for some patients who have a violent teeth inward protrusion of the front teeth to improve the shape of the face. Where does this space come from? The only way to provide enough space is through tooth extraction. Of course, when extracting teeth, the orthodontist will strictly grasp the “Indications for Extraction”, as far as possible not to extract teeth or extract fewer teeth, and extract bad teeth or extract teeth with deteriorated function as far as possible, and try to retain healthy teeth. At the completion of treatment, the doctor will close the extraction gap completely, leaving no space, not to mention the need for dentures. The goal of the orthodontist’s extractions is to improve aesthetics while allowing the remaining teeth to be aligned in the optimal position for maximum function. And with effective local anesthesia, the oral and maxillofacial surgeon will ensure that the tooth is removed completely without pain. After the tooth is removed, the extraction wound heals quickly as long as you follow the doctor’s instructions. You will be able to wear orthodontic appliances to straighten your teeth about a week after the extraction. In conclusion, in the process of orthodontic treatment, as long as the patient chooses to visit the regular orthodontic medical clinic and follow the doctor’s instructions, orthodontic tooth extraction will not cause tooth loosening, and of course, it will not affect the nerve or produce other sequelae.