Dental disease is divided into the following types: 1, caries, when caries appears, it should be treated in time, caries is divided into superficial caries, medium caries and deep caries. Patients without nerve leakage can fill the tooth directly, if there is nerve leakage, it is pulpitis. 2, pulpitis, patients need to take the nerve for root canal treatment or kill the nerve for dry pulp treatment. Most of the pulp is removed, the root pulp is preserved, the drug that makes the nerve dry cadaverized is put in, and then the tooth is filled. 3, periapical disease, the treatment is also root canal therapy, and with antibiotic anti-inflammatory treatment. For example, cephalosporin, amoxicillin, with metronidazole, tinidazole tablets and other drugs. 4, wedge-shaped defects, caused by long-term improper brushing methods, prone to hot and cold irritation, pain, patients are advised to fill the teeth in time, or do gingivoplasty.