Saline and silicone breast implants are two different types of implants that are used to enhance the size and shape of the breasts. Saline implants are filled with a sterile saltwater solution, while silicone implants are filled with a silicone gel. Saline implants tend to be less expensive and can be inserted through a smaller incision. However, they may not look or feel as natural as silicone implants. Silicone implants tend to look and feel more like natural breast tissue, but may require a larger incision for insertion. Both types of implants carry some risks, and the decision to choose one type over the other should be made in consultation with a qualified plastic surgeon.