A small piece of the incisor knocked out can be repaired, and if there is no labial side involved, but simply a lingual defect, it can then be filled directly with a light-cured composite resin, which is also particularly aesthetically pleasing. High-strength resins can also be used, which are also very hard. Alternatively, if the labial side is involved, resin veneers or porcelain veneers can be used. If the defect is relatively large, you can also use porcelain crown restoration, and porcelain crown will need to grind the overall tooth smaller, and then take the mold, the mold can be made directly with the mouth sweep, and then directly bonded, the color and hardness are very considerable, and also relatively time-saving.