What should be prepared before chin augmentation? 1.Questioning medical history, check blood routine, coagulation function. 2.Physical examination of the patient’s bite? Relationship, facial three court proportion relationship. Measure Ricketts cosmetic plane. 3.Check the local skin, oral mucosa, teeth and other infectious diseases. 4.According to the measurement of Ricketts cosmetic plane, determine the degree of chin augmentation. 5.Determine whether to extend the chin and the length of the chin extension according to the proportionality of the three chambers of the face. 6.Consult with the surgeon to choose the appropriate chin augmentation material. What are the precautions after chin augmentation? 1.Antibiotics for 3~5 days after surgery. 2.Rinse your mouth with mouthwash 4-6 times a day for 1 week. 3.Compression bandage for 2-4 days. 4.Eat a clear soft diet or semi-liquid diet for one week after surgery. 5.You can use soft-bristled toothbrush to brush your teeth one week after surgery. What are the commonly used materials for chin augmentation surgery and how to choose? There are many chin augmentation materials, including solid silicone, expanded polytetrafluoroethylene, hydroxyapatite particulate artificial bone, medical polyacrylamide hydrogel, autologous bone or cartilage. Among them, solid silicone and expanded polytetrafluoroethylene are the most used. Their main advantages are safety, reliability and desirability. Any substitute implanted in the body must be safe, reliable and harmless. In case there is any problem it can be removed easily and completely, unlike artificial bone and liquid fillers, which are difficult, troublesome and unclean to remove.