The specific time to repair a good incisor crown fracture depends on the degree of tooth damage and the part of the tooth that is fractured, depending on the situation, it may be half a month to half a year, or the tooth may not be retained. 1. Half a month or so. Crown fracture of incisors need to take pictures to check whether the root of the tooth is damaged, if the root of the tooth is not damaged, the crown fracture does not injure the pulp of the tooth is generally observed after desensitization treatment or resin filling, spend time in half a month or so. 2. About half a year. Crown fracture of incisors if the damage to the pulp need to do root canal treatment after crown repair, time in a month or so, if the crown fracture after examination of the root fracture or tooth shock, need to be adjusted and fixed observation for 2 to 3 months, if there are symptoms of pulpitis need to spend a month or so endodontic treatment of crown repair. If the tooth inflammation is more serious according to the situation need to be extracted, can not be repaired well. Incisor crown fracture when to repair good specific need to check the condition of the tooth to determine.