Obstructed teeth lead to crowded teeth, which usually do not need to be corrected and need to be extracted. 1. Usually with the continuous evolution of human beings, the jawbone will continue to shrink and can only accommodate the first to the seventh teeth, and the eighth tooth usually does not have enough space to erupt, which will easily lead to the blockage of wisdom teeth. At this time, it is necessary to remove the blocked wisdom teeth to prevent pericoronitis of wisdom teeth, caries of neighboring teeth, and cysts in the jawbone. 2. Generally speaking, unless the front teeth, i.e. the second molars, have problems and need to be extracted, the blocked teeth that may erupt in an abnormal position, i.e. the wisdom teeth move to the position of the second molars, are very rare and usually do not need to be corrected, but only need to be extracted. Patients with crowding caused by blocked teeth are advised to seek prompt medical attention to avoid delays.