Inflammation of the root of a broken tooth in children, i.e. periapical periodontitis, is categorized into acute treatment (e.g. cefixime, etc.) as well as radical treatment. 1. Acute treatment (1) The main purpose of the acute stage is to control the acute infection. It can be done by opening the pulp and drainage, incision and drainage of pus, etc., to open the pulp cavity, extract the root pulp, and ensure that the root canals are open, so that the inflammation can be drained from the root canals. (2) The drug treatment in the acute stage is mainly to alleviate the symptoms, if the pain is obvious, you can use ibuprofen and other symptomatic pain relief. When the inflammation spreads and the redness and swelling are very obvious, oral cephalosporin antibiotics, such as cefixime, can be used to control the local infection. 2. Radical treatment: After the acute symptoms have been relieved, root canal surgery can be performed, mainly root canal surgery, etc., with follow-up visits every two weeks. Children’s teeth broken root inflammation, there are other treatment methods, it is recommended that once the occurrence of timely consultation, under the guidance of the doctor’s scientific treatment. The above medication should be prescribed by a doctor.