The surgical enlargement of the female breast (usually) is known as augmentation mammaplasty. This involves placement of a silicone bag either behind the breast tissue or behind the muscle behind the breast tissue. Yes, while most people understand that there are "saline" and "silicone" implants, the actual bag is constructed of silicone rubber, also known as "silastic". Therefore all breast implants contain silicone. Most implantations now are placed behind the pectoral muscle and are known as "submuscular" implants. There are several good reasons for this, but in short there are fewer problems with this approach, and if there are problems they are easier to take care of. An important consideration involves how the implant is introduced into the body. I prefer a transaxillary approach or through the "armpit". All things considered, I prefer this method because it does not involve an actual scar on the breast itself. I have used this method for over 32 years and can place virtually any size implant into it's proper pocket.