Rotten teeth, that is, the teeth have a dental defect, there may be caries or pulpitis, the treatment mode for the affected teeth for the appropriate treatment, such as removing clean decay, root canal treatment, and then restoration treatment, specific as follows. 1. Caries: Remove carious decay and fragile tooth tissue structure, if the defect is small, then resin filling repair, if the defect is large, then inlay repair, in order to restore the shape and function of the tooth. 2. Pulpitis: It is necessary to carry out perfect root canal treatment, including root canal preparation, root canal disinfection, root canal filling, and then use the core crown to repair the defects, and the crown can choose all-ceramic crowns, metal porcelain crowns and so on. It is recommended to go to the hospital in time to receive regular treatment as early as possible.