Under what circumstances should teeth be extracted?

There are mainly the following situations that need tooth extraction: 1. Teeth with serious caries, periodontal disease, pulp necrosis, teeth after treatment, the treatment effect is not good or has no value for treatment. 2. Supernumerary teeth, malpositioned teeth, embedded teeth, etc. These kinds of teeth will cause trauma to adjacent soft tissues or cause dentition crowding. 3. Impacted wisdom teeth. Wisdom teeth impacted after not only easy to cause wisdom teeth pericoronitis, but also may cause damage to adjacent teeth, need to be extracted. 4. Crown fracture has reached root canal treatment and repair treatment, to be extracted. 5. Focus teeth. Cause jaw osteomyelitis, maxillofacial space infection and other diseases focus teeth need to be extracted early.