A small piece of incisor missing can be repaired, but the way of repair needs to be judged on a case-by-case basis. If a small piece of the incisor is missing, you need to go to the hospital or a regular dental clinic to take a dental radiograph to determine whether the pulp has been damaged. If the pulp is not damaged and the defect is small, direct filling can be used; if the pulp is damaged, root canal treatment is needed before repair. If the defect is large, veneers, partial crowns or full crowns can be used to repair; if the situation is more complicated, it is necessary to carry out causative treatment after root canal treatment, then repair and further braces to protect the remaining teeth. Attention should be paid to avoid alternating hot and cold stimulation in daily life. Eating something particularly cold immediately after having just eaten something particularly hot will stimulate the teeth, causing the phenomenon of tooth chipping and falling off to occur.