The following treatments can be carried out in case of gingival recession of all-porcelain teeth: if the neck of all-porcelain teeth is attached with food debris and soft tartar, and mineralized to form calculus causing gingival recession, the calculus can be scraped off manually and polished with silicone die head, and the gingiva will be attached to the neck of the tooth very quickly; if X-rays show that significant resorption of the alveolar bone occurs in the neck of the all-porcelain teeth, resulting in periodontal atrophy, periodontal flap surgery can be carried out under local anaesthesia, and the diseased bone and granulation tissues are scraped off and covered with bone powder and periosteum. Bone and granulation tissue covered with bone powder and periosteum, to promote the formation of new periodontal attachment; if the gums are heavily receded, it is necessary to dismantle the all-ceramic tooth, re-denture preparation, fine rows of gums, make an impression of the new all-ceramic crown after bonding restoration.