Dental disease is a disease that occurs on the body of the tooth, and periodontal disease is a disease that occurs on the periodontal tissues. The tooth tissue structure has enamel, dentin, etc. In case of partial caries or defect of enamel and dentin, commonly known as worm teeth, the decayed material should be removed and the normal tooth tissue should be exposed and restored with restorative materials to restore the normal form and function. If partial damage to the nerve tissue is involved, it needs to be restored with pulp protection material again. If more serious lesions such as pulpitis and apical infection are caused, the pulp tissue is removed and endodontic treatment or apical root canal treatment is done. Periodontal disease occurs within the periodontal tissue, which includes the structures of the gums, alveolar bone, auxiliary gums, and free gums. If there is gum inflammation, anti-inflammation is performed. If there is calculus and stained plaque in the periodontium, treatment such as removal is performed.