Lower wisdom teeth extracted upper wisdom teeth generally also need to be extracted, if the upper jaw can be with the mandibular second molar and other occlusal, can be retained, it is recommended to the hospital for specific examination and treatment. 1. After the lower wisdom teeth are extracted, the upper wisdom teeth usually have no opposing teeth, no occlusion, and no chewing effect, so they should be extracted in time. 2. After the removal of lower jaw wisdom teeth, the upper wisdom teeth will be elongated due to the lack of occlusion for a long time, and after elongation, it is easy to form an angle with the neighboring teeth to appear food inclusions, and caries may occur, so it is recommended to remove the upper wisdom teeth after the removal of lower wisdom teeth. If the maxillary wisdom teeth and the mandibular second molar or other teeth have occlusion, you can retain the upper wisdom teeth as functional teeth, specific need to consult a professional doctor.