Deflated saline implants just appear flat. Silicone implants may take on a different shape but will not migrate all over the body. But it is best to have them removed.
If saline implants rupture the implants will deflate, and the saline will be resorbed. In most cases the remaining implant will not cause a medical problem. If Silicone gel implants rupture, in most cases the gel will remain within the breast capsule that the body has formed and may not pose a problem. However, if the silicone gel escapes into the surrounding breast or lymphatic tissues the silicone can on some occasions cause problems such as infections or lymphedema. Therefore, if a silicone gel implant is noted to be ruptured it should be removed and/or replaced. A new form stable silicone implant (Gummy Bear Implant) (Silimed Implants - Sientra) is now available on the market. These form stable silicone implants do not leak even if punctured or cut, and should reduce the above risks associated with silicone implant rupture.