Firstly, the histocompatibility of the two materials was compared. Expansive materials and silicone prostheses have good high and low temperature resistance, good chemical stability, corrosion resistance and histocompatibility, and are non-toxic, non-carcinogenic and non-teratogenic, but few people will reject them. Due to the special structure of the expansion material, blood vessels and nerves can gradually grow into the expansion body, so that the expansion body can grow together with human tissue, while the silicone prosthesis can not grow together with human tissue. 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, which is the most widely used and effective material for rhinoplasty.

Secondly, compare the plasticity of the two methods. Although the expanded material has certain flexibility, its elasticity and three-dimensional effect are poor, so it is not suitable for carving and shaping, and the effect of supporting the nose column and tip is not good. The silicone prosthesis itself has the basic shape of the 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.