A broken incisor with a hole and black inside is generally considered to be one of the manifestations formed after bacteria eroded the incisor for a long time and caused tooth decay. For patients with serious incisor damage, they can go to the hospital dentistry department or regular dental clinic for restoration treatment. If not treated in time, tooth decay will be formed and develop gradually, which may seriously affect the chewing function of teeth and even cause pulpitis and periapical inflammation etc. Therefore, the following methods can be taken for treatment: I. Drug treatment Clinical drugs used to prevent tooth decay include sodium fluoride glycerin paste, stannous fluoride solution and ammoniacal fluoride preparation etc. These drugs can be used externally to prevent further aggravation of tooth decay symptoms. Surgical treatment 1.Filling restoration: If the cavity and blackened area formed on the incisors of the patient is large, but it does not penetrate the pulp cavity and does not cause pulpitis and other diseases, filling can be adopted for restoration treatment. Clinically, light-curing composite resin and silver amalgam are used for filling; 2, root canal treatment method: if the cavity and blackened incisor have pulpitis, periapical inflammation, pulp exposure and other problems, the situation is more serious, root canal treatment is needed to remove the lesion and then use professional materials for root canal filling. For the incisor hole that has been formed, it can be filled, or choose the crown repair; 3, other: patients with serious incisor damage, you can consider the tooth extraction, and then choose dental implants, movable dentures, etc. for replacement. In addition, tooth decay may recur after restorative dentistry, so patients also need to strengthen daily management, minimize the intake of sweets, and use mouthwash or dental floss for cleaning after meals. By ensuring the cleanliness and hygiene of the oral cavity, the chances of the teeth being eroded by bacteria again are reduced.