The following treatments are available when gingival recession occurs after orthodontic treatment: 1. A large amount of food residue and soft scale retention occurs around the tooth brackets, especially near the cervical part of the teeth, forming calculus and stimulating the gums to become red, swollen and bleeding, resulting in recession, which requires ultrasonic cleaning and scraping the subgingival calculus in the gingival sulcus, rinsing the periodontal pockets, and applying iodine glycerin to promote the gums to return to normal. 2. The orthodontic force is too large, resulting in alveolar bone When resorption and gingival recession occur, it should be replaced with fine wire orthodontics and intermaxillary traction should be removed to form new bone cells in the alveolar bone around the roots of the teeth and restore the health of the gums. 3, when atrophy of the gums and other soft tissues occurs at the neck of the teeth, presenting a black triangle, smooth turning pins or sand pieces can be used to grind and change the contact relationship between neighboring teeth, gradually closing the gap and restoring the normal level of the gums.