If the incisor is crooked, the treatment can be taken according to the specific situation, as follows: i. If the tooth is mildly crooked, a small amount of labial enamel can be abraded and a resin veneer or all-porcelain veneer can be made to adjust the orientation of the tooth. Second, if the incisor is severely crooked, a one-time root canal treatment under local anesthesia can be performed after bonding the pile nucleus, completely changing the direction of the long axis of the tooth and making a porcelain or all-porcelain crown restoration. Third, if the patient does not want to wear the dental tissues, fixed or invisible orthodontic appliances can be worn to tug the teeth to move, combined with implant support if necessary, to move the teeth to the labial or lingual side and align them with other teeth to establish a normal occlusal relationship.