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Medical-grade silicone used in the past for breast augmentation, and currently for short-term use in retinal detachment and surgeries of the vitreous or the urethra. The more purified the silicone oils used, the better tolerated and the more biocompatible the implant application. Numerous prostheses are made of silicone and it is controversially used in breast implants.See: breast implant
See also: silicone