A breast implant is a medical prosthesis that is placed inside the breast to augment, reconstruct or create the physical form of the breast.
The outer layer of breast implants is made of firm silicone. The inside of the implant is filled either with salt water (saline solution), silicone gel, or a composite of alternative substances. Makers of breast implants say they should last for at least ten years.
Breast augmentation can: