For many patients and their families who have not corrected their teeth or are about to correct their teeth, it is often difficult to understand and accept that teeth still need to be extracted. So why do you need to extract teeth to correct your teeth? Ryan thinks there are several reasons: 1. When the dentition is crowded, the teeth are irregularly arranged, such as the most common "tiger teeth", and the lower incisors are seriously crowded, so one tooth needs to be pulled out to provide a gap. 2. Some people's teeth protrude badly, and their lips protrude on the side, which is often called "tooth swelling and tooth dew". It is necessary to extract teeth to correct "pressing" the front teeth. To sum up, tooth extraction has three main purposes, that is, to relieve the crowding of dentition, reduce tooth protrusion and adjust the occlusal relationship between upper and lower dentition. Especially after the whole tooth is finished, the doctor will close all the tooth extraction spaces, and there is no residual space in the dentition.