Indications: For people with midfacial depression (depression of nasal floor), the problem of facial depression (depression of nasal floor) cannot be improved simply by surgery (as shown above). Only by filling the bottom of the nose can we achieve satisfactory results and make the face look fuller. There are some technical characteristics: the technical requirements are relatively high, and it is generally not easy to master. First make two small openings in the mouth, separate the nasal base, then put the triangular prosthesis in and lift the alar base. This method is very common in Korea. Secondly, a through incision was made on the lateral edge of the nostril (inside the nasal columella), which was separated from the surface of the upper alveolar bone, and then a flying swallow prosthesis was placed under the nasal columella. This method is commonly used in the United States, and it is necessary to choose two methods according to different situations.