After tooth extraction, the upper and lower teeth bite unevenly, may be produced by inflammatory swelling, or have the opposite jaw wisdom teeth elongation, alveolar bone recession and so on. 1. Inflammatory swelling: after tooth extraction may produce inflammatory reaction, easy to cause inflammatory edema, so most of the patients will feel their teeth are not the same length, easy to bite the symptoms of misalignment. 2. Wisdom teeth elongation on the opposite jaw: If only one side is removed during tooth extraction, but the wisdom teeth on the opposite side are not removed, it may cause the wisdom teeth to elongate, which may cause disorders in the upper and lower occlusal relationship, and symptoms of malocclusion. 3. Alveolar bone recession: If there is periodontitis before tooth extraction, but it is not treated, it may cause periodontal recession, so after tooth extraction, the upper and lower teeth bite will be uneven. After the extraction of teeth, if the symptoms of uneven bite, it is recommended to observe for a period of time, such as has not been able to alleviate, it is necessary to go to the hospital to do dental examinations to understand the situation, such as filming.