Breast augmentation surgeries have become very safe nowadays. Especially with the development of technology, it is possible to use these silicones for a lifetime thanks to a special wall covered with silicones. Even if the outer wall of these silicones is damaged, the gel in which we call the gel cohesive is reduced with its fluidity, ie it is produced with suitable gels for special health which are prevented from flowing out of the silicone. Because of this, none of the silicones which are known in the market and which are used in the world are of a certain level. As a result of the great research done today, the American Health Office has approved breast augmentation with these silicone prostheses, and in the US, millions of people have breast augmentation every year. Therefore, it was agreed that the silicones used in breast enlargement would definitely not cause cancer. Currently, the same silicones are used for breast cancer patients. We would not use these silicones for patients who received breast cancer because of the cancer. Therefore, we can say that these silicones will not cause cancer according to our scientific criteria.