3、How to choose between silicone and expanded body?

Silicone and expanded body are the most commonly used nasal prosthesis materials in the market today. Silicone has nearly a hundred years of clinical experience, used in the body into the prosthesis also has nearly 50 years of history, its biggest feature is high tissue compatibility, not easy to decompose, its elasticity and plastic memory ability is strong, can maintain the required shape, and easier to build and cut, so as nasal prosthesis grafts are widely used and accepted until today. Silicone prosthesis with the increase in the use of the field and brand, so the market price is very affordable, nasal prosthesis in recent years, in order to simulate the physiological function of the design of two-stage, three-stage prosthesis, so can be done to increase the choice of surface. Expanded Gore-Tex, originally an industrial material, was later used as a tissue patch for clinical use, and began to be used in the nineties in the field of cosmetic surgery, and was used as a nasal prosthesis. It is characterized by good tissue compatibility, and moderate hardness, not easy to form a membrane, the tissue is not easy to degrade, the tissue is easy to shape and cut, and can be used for self-sculpting prosthesis use. The price cost is higher due to the cost of testing and introduction of patents. The disadvantage of silicone prosthesis is that it will form obvious envelope, and the envelope will have contracture in the distant future, so it will make the outline of the dorsal nasal prosthesis obvious, at the same time, the silicone tissue has the translucency, so there will be dorsal translucency phenomenon in the side view, and the material has strong elasticity but it is easy to cause necrosis of the local tissue compression, and these problems can’t be remedied by the material itself. Expanded body is a kind of porous tissue, similar to foam, its pore size is 5-10μm, the diameter of macrophages is 15μm, the diameter of bacteria is about 0.5-5μm, so the expansion of the inner hole can enter the bacteria but can not enter the bactericidal cells, so the expansion of the body in the process of placing the body can not guarantee a completely aseptic environment, so expansion of the body is very difficult to avoid the infection, and even have a distant infection, and the infection. Once the infection occurs due to its characteristics, it is difficult to completely control.