Since 1970s, silicone and silicone prosthesis have been widely used in cosmetic breast augmentation. Because of its large molecular weight, it is jelly-like, so it feels close to normal tissue of human body. However, in 1992, the US Food and Drug Administration officially announced that silicone breast prosthesis is harmful to human body, which may be related to autoimmune diseases. Manufacturers should stop production and doctors should stop using it. Because there is no more convincing evidence, the ban has been lifted and is still in clinical use. However, silica gel and silica gel prosthesis affect the X-ray penetration, so it will affect the X-ray examination of breast and chest after breast augmentation.

2 physiological saline breast prosthesis, the contents are filled with physiological saline, which is harmless to human body. Because the molecular weight of brine is small, it feels hard when it is poured too much. When the filling is insufficient, the prosthesis is easy to rupture because of the folds of the outer membrane. Because physiological saline is filled in an open state, it is very easy to be polluted. It may lead to the formation of mold clusters in salt water, which is absolutely harmful to the body if the prosthesis ruptures.

Hydrogels are actually composed of water and polysaccharide compounds, and have a three-dimensional chain jelly-like structure. It is a new generation of breast prosthesis, and has the trend of becoming an ideal substitute for silicone, silicone and saline prosthesis. Good histocompatibility, realistic feel, safety and reliability, and no extravasation problem. Even if the prosthesis is broken, the hydrogel can be quickly absorbed and decomposed by the human body, which is harmless to the human body. Hydrogel has good x-ray permeability and does not interfere with the x-ray examination of breast and chest after breast augmentation. However, it is relatively expensive and has not been popularized in clinic at present.

2. Autologous fat

Breast augmentation material for injection is polyacrylamide hydrogel (Ingfarole and Ogilvy belong to this kind of products). The method is to inject directly into the breast tissue space with a special syringe, which generally has no obvious effect on the breast tissue. However, when breast tissue proliferates during pregnancy, breast augmentation materials will cause certain pressure on breast tissue, especially when infection or rejection occurs after operation, it is difficult to completely remove them from human breast tissue. Therefore, infertile people should use it with caution. It is used for breast augmentation for a short time, and its long-term impact on human body needs further study and observation. Restricted observation and application of third-class hospitals