Breast augmentation is a kind of plastic surgery to improve women's figure. Breast augmentation surgery appeared in the 1960 s, and some fillers (such as silica gel) were put in the breast. Since 1960' s, silica gel is often used as breast augmentation material in surgery, because silica gel is not easily rejected by the body, and its texture is similar to human breast tissue, making it feel more natural. 65438+In the early 1980s, there were studies in the United States that suspected silica gel.