Depending on the condition, you will need to choose between filling treatment, root canal treatment and crown restoration, tooth extraction and prosthetic restoration. 1. Filling treatment: If the tooth cavity is not very serious and the pulp is not involved, then the patient can choose filling treatment. Before filling treatment, the decayed material, dirt and germs in the cavity should be removed, and then choose suitable filling material to fill the cavity. 2. Root canal treatment and crown restoration: If the tooth cavity has already involved the pulp, it is necessary to take root canal treatment in time, and then use the remaining tooth tissue for crown restoration after the root canal treatment, so as to improve the symptoms. 3. Tooth extraction and prosthetic restoration: If the tooth decay is very serious and corroded to other root bifurcations, the tooth should be extracted in time, and prosthetic restoration should be chosen after the tooth is extracted. Tooth decay needs to be treated according to the condition, it is recommended that patients go to the hospital in a timely manner, under the guidance of the doctor to take standardized treatment, do not treat privately, do not ignore the condition, so as not to delay the diagnosis and treatment of the condition.