In the case of enamel loss in incisors, separate treatment is required depending on the area and depth of the defect. If the depth of the defect is shallow and the area is not large, the tooth can be slightly prepared and repaired using a composite resin with good adhesive properties. When the enamel reaches the dentin layer, resulting in sensitive teeth, desensitizing medication needs to be applied to alleviate the pain. If the defect area is large and not easy to adhere, it is necessary to carry out tooth preparation for the enamel on the labial side, and make all-ceramic veneers and then adhesive repair.