1, the shape and size of silicone rubber prosthesis should be properly selected and trimmed. If the prosthesis is too large and inserted reluctantly, it will make the tension on the back of the nose or the tip of the nose too large, plus postoperative swelling and poor blood supply, which can cause skin necrosis or the prosthesis will pass through the tip of the nose and incision. For the "L"-shaped prosthesis, we should pay attention to the design of the nasal columella not to be too long. Don't carve the tip of the willow prosthesis too hard and sharp, or the skin of the tip will be broken after long-term stimulation.

2, silicone rubber prosthesis base and implant bed should be as close as possible. This can increase the relative stability between the prosthesis and the implant bed and surrounding tissues, reduce the mobility, promote healing and reduce the formation of excessive fibrous capsule.

3. The subperiosteal tunnel should have proper size and symmetry. If the tunnel is too large and not fixed, the prosthesis is easy to shift; Too small, the prosthesis is easy to wear or cause skin necrosis; Left-right asymmetry is the direct cause of prosthesis skew. In addition to the requirement that the stripped tunnel must be under the periosteum, it should also be noted that the subcutaneous tunnel at the front end of the nose should not be stripped too shallow, otherwise long-term friction or touch stimulation will also lead to skin rupture at the tip of the nose and prosthesis wear.

4. Provide a good healing environment with the body for the silicone rubber prosthesis. Poor healing environment can thicken the fibrous capsule around the prosthesis. Too thick capsule contracture will make the implanted prosthesis passively deformed, which will affect the appearance. Therefore, before the fiber envelope around the silicone rubber prosthesis is stable (2-6 months), it is necessary to minimize or avoid adverse stimulation such as touch and impact to ensure the normal transformation of the encapsulated fiber.

(5) Reduce the surface pollution of silicone rubber prosthesis. There is static electricity on the surface of silicone rubber, which is easy to absorb dust and cilia and difficult to remove. Any pollutant will increase the human body's foreign body reaction to the prosthesis. Therefore, the prosthesis should be supported by instruments as much as possible during the operation, and attention should be paid to cleaning to prevent foreign bodies such as talcum powder or cloth cilia, thread ends, trimmed debris and tissue residues from being brought into the surgical wound.