Commonly used filling materials are cartilage, bone and silicon limbs. The filled costal cartilage is not easy to be absorbed, but it is easy to deform and bend; Although bone filling can straighten the bridge of the nose, it is easily absorbed. At present, injection rhinoplasty is used, that is, injecting room temperature vulcanized liquid silicone rubber into the depression of the bridge of the nose and shaping at the same time. Medical room temperature vulcanized liquid silicone rubber has stable performance and is non-toxic and non-irritating to human body. But if the operation is not normal, rejection or infection may occur after injection. At this time, it is difficult to take out the silicone rubber, and the local ulceration will not heal for a long time. It is necessary to completely scrape off the tissue infiltrated by liquid silicone rubber through surgery.