① Silicone prosthesis: made in China and imported from Korea, widely used in plastic surgery. It has good biocompatibility, stable properties, easy molding, no toxicity, no teratogenic effect and ideal rhinoplasty effect. It is also the first choice for rhinoplasty in plastic surgery institutions all over the world, with reasonable price, simple acquisition and one-step molding.
(2) PTFE: It is a porous solid material with many micropores, which is extremely stable in performance, soft in texture, easy to carve, realistic in shape and not easy to scrap.
③ Autologous cartilage: It has no rejection to autologous tissue. This method of rhinoplasty is suitable for the overall shaping of nose shape and the special shaping of nose tip. It has the best compatibility with nasal tip cartilage and is the most realistic. Comparison between silicone gel and rhinoplasty
Comparison of material texture
Generally speaking:
The expansion material is also called PTFE: PTFE is resistant to high and low temperatures, has good chemical stability, corrosion resistance and histocompatibility, and is non-toxic, non-carcinogenic and non-teratogenic. Material characteristics of rhinoplasty
1. The expanded rhinoplasty material is composed of expanded polytetrafluoroethylene (PTFE) columnar structure and connected with PTFE fibers arranged in all directions, which balances the strength of the expanded rhinoplasty material in all directions.
2. The average length of internode fibers (such as pore size) is 20-25 μ m, and the unique micropore ultrastructure of expanded rhinoplasty makes the expanded rhinoplasty material have the characteristics of biomaterials-easy to bend, soft and not easy to wear. In addition, this ultrastructure also allows cell infiltration and tissue growth.
Silicone rubber prosthesis is polymer silicide. It has good biocompatibility, and there are two kinds commonly used at present, one is willow shape and the other is "L" shape. Prostheses of various shapes and models such as nasal tip, alar and columella can be prefabricated, and the technical requirements for doctors during surgery are relatively simple. Because it can't establish blood circulation with the body and form tissue connection, it is only wrapped by fibrous tissue, so it can pass through the skin at the weak part of the tissue. Due to the contracture of fibrous capsule, it can cause the surface of silicone prosthesis to protrude, which affects the appearance effect.
Specifically, the difference between expansive materials and silica gel materials.
1. To compare the histocompatibility of silicone augmentation rhinoplasty and expanded augmentation rhinoplasty materials. Expansive materials and silicone prostheses are good, resistant to high and low temperatures, chemical stability, corrosion resistance, good histocompatibility, non-toxic, non-carcinogenic and non-teratogenic. However, very few people will reject silica gel. Due to the special structure of augmentation rhinoplasty materials, blood vessels and nerves can gradually grow into the augmentation body, so that the augmentation body can grow together with human tissues, while the silicone prosthesis can not grow together with human tissues. After implantation, there may be a slight one-off inflammatory reaction in the local area, and a thin fibrous capsule will be formed around it in the later stage. It is the most widely used and effective material in rhinoplasty. Therefore, as far as the material texture of rhinoplasty is concerned, it is naturally a good rhinoplasty. It can be used as a material for heart bypass surgery, and has good compatibility and almost no rejection. Silicone rhinoplasty has strong plasticity and few people will reject it. If rhinoplasty fails, it can be completely removed.
2. Comparison of plasticity between silicone rhinoplasty and rhinoplasty. Although the expanded rhinoplasty material has some flexibility, its elasticity and three-dimensional sense are poor, so it is not suitable for carving and shaping, and the effect of supporting the nose column and tip is not good. Silicone rhinoplasty prosthesis itself has the basic shape of nose and can be carved at will. Silicone rubber can be prefabricated into various shapes and models of nasal prosthesis, such as nose tip, nose wing, nose column and so on. , commonly used are "L" shape, "T" shape and willow shape. Good flexibility and elasticity, strong three-dimensional sense.
3. Because the expanded rhinoplasty material will have the characteristics of tissue growth, it will bring trouble to the patient's second operation. Through observation, we found that the longer the expanded rhinoplasty material stays in the body, the more unfavorable it is to take out the expanded material. Due to the close combination of tissue growth and swelling with human tissue, the cavity formed is getting smaller and smaller, so if the swollen rhinoplasty material is taken out, it is like taking out a piece of your own tissue, which is self-evident. In the body, tissues grow together without trouble. Generally, the cavity of the prosthesis will not change much during the operation. The prosthesis is wrapped in a fiber envelope just like wearing a dress, so taking out the silicone rhinoplasty prosthesis is as simple as taking something out of your pocket without causing any damage to the surrounding tissues.
4. Through the observation of some patients, we found that the expanded rhinoplasty material will lose its original elasticity and become very solid when it grows organically, which will make its appearance and feel unreal and make the nose look dull and unnatural. Silicone rhinoplasty prosthesis does not have such problems. It will not change its corresponding shape with the passage of time, tissue growth will not occur, and the hand feel will not change. Toughness and elasticity are relatively stable, so it is natural.
Comparison of sex and price
In this regard, silicone rhinoplasty is the most cost-effective product, which can greatly reduce the cost of beauty seekers. On the whole, the price of rhinoplasty is still on the high side, basically above 8 thousand yuan, and the price of imported products is higher. There are many joint venture and imported prosthetic brands, but some of them are cost-effective.
Security comparison
The safety of silicone rhinoplasty has been fully affirmed, and it has become one of the mainstream rhinoplasty prostheses in the market. Doctors should carve solid silica gel according to the needs of beauty seekers and pad it into the back of the nose to make the bridge of the nose look more upturned. With the development of science and technology, the silicone used now has made a great leap compared with the past, and has greatly improved in quality, age and combination with human tissues, which can be regarded as a safe and secure silicone rhinoplasty. After years of development, the safety of rhinoplasty is obvious to all, and it will not cause rejection.
Disadvantages of swollen silicone rhinoplasty
The disadvantages of rhinoplasty are:
1, rhinoplasty is cured, and rhinoplasty material is integrated with human body, which is more difficult to take out than silicone rubber. Of course, because one-time operation can be maintained permanently, this problem will only occur when the effect of rhinoplasty is not satisfactory and another operation is needed. Surgeons with rich experience in this material can easily take it out.
2. Expanding rhinoplasty is more expensive than silicone rubber.
3, it is difficult to shape, so sculpture needs experienced rhinoplasty doctors.
The disadvantages of silicone rhinoplasty are:
(1) The shape is not ideal: solid silica gel has been formed, and the shape after rhinoplasty is unnatural, with no normal nose forehead angle, nose face angle and nose lip angle, no ideal aesthetic curve and no natural radian coordinated with the face.
(2) Prosthesis is easy to shake: because it is surrounded by fibrous tissue and implanted under the skin, the outline of the implant is faintly visible. When you touch the nasal root with your hand, the implant shakes slightly, that is, you feel the implanted silicone rubber nose bridge prosthesis floating and shaking under the skin; The prosthesis is deviated and the nose root is stepped deformity.
(3) Light transmission of the prosthesis: due to the contracture of the fibrous capsule, the surface of the silicone prosthesis can be projected, and the reflection of the nose and back can be enhanced after operation, making people feel the existence of the subcutaneous prosthesis.
(4) Prosthesis exposure: The following factors lead to prosthesis exposure: ① The nasal tip is too high, the blood vessels around the nose are dilated and congested, and the skin becomes thinner. ② The silicone nose mold is too long, and the nose root is not completely peeled off. The upper end of the model is placed in the subcutaneous cavity, and the surrounding is not firmly fixed. Under the action of gravity, the nose mold hangs down to the nose end, and the skin at the nose tip column bulges, turns white and proliferates for a long time, puncturing the skin and exposing silicone rubber. ③ In addition, the silicone rubber mold on the nose post is too thick, and the prosthesis repaired by solid silicone rhinoplasty is not smooth and has a sharp edge. The distal end of the cylinder was not implanted with the anterior nasal spine, but bent and curled when implanted between alar cartilage; Or there is insufficient peeling here, and the column is misplaced. It often happens that the silica gel mold pierces the nasal mucosa, or pierces the skin at the nasal vestibule, so that the silica gel is exposed.