If you've made the decision to choose implants, you need to decide which type. Both shells are made of medical-grade silicone, but the saline implants are filled with sterile saline, while the silicone implants get their shape via a silicone gel insert. Like all of your options, each one has its pros and cons.For example, many women (and doctors) think silicone has a more natural look and feel than saline, but saline implants are filled after they are placed, which often results in a smaller incision. No matter which type you choose, if the implant ruptures, the shell has to be removed. With a saline implant, the saline will be absorbed by your body. This is another decision to make together with your doctor.