Dentistry generally refers to orthodontic correction, periodontal disease, blood disease, temporomandibular joint ankylosis and other diseases if there is no treatment can not do dentistry, it is recommended to go to the regular hospital for timely examination and treatment before doing plastic surgery. 1. Periodontal disease will have bleeding gums, alveolar bone resorption and loose teeth, do dental plastic surgery may aggravate periodontal disease, and even the phenomenon of tooth loss. 2. Patients with blood diseases are especially prone to bleeding if their blood indexes are unstable, and this kind of patients can not do dental plastic surgery. 3. If you have temporomandibular joint ankylosis, you can’t open and close your mouth, so you can’t do cosmetic dentistry during this period. It is recommended to actively treat periodontal disease, blood disease, temporomandibular joint disease, etc., after the condition is stabilized and cured, dentistry can be done.