Thank you for your question. Because implants are not living tissue, they cannot be "rejected" in the sense that a kidney is rejected or cadaver skin is rejected. All implants have a silicone shell. Silicone is made from silicon which is in the same family of elements as carbon. Because of this, silicone is very biocompatible and almost all medical devices have some sort of silicone component. Because it is a foreign device, your body will form a scar capsule around the device. This is completely normal and happens with plastic, metal, or ceramic implants. Reasons you may lose your implant are related to problems like infection, nonhealing wounds with implant exposure, or capsule contracture. It is normal to have some anxiety about your surgery, but implant rejection is nothing to be worried about. I would make sure you discuss with your PS to make sure you feel comfortable and confident about your decision to proceed with surgery.Best wishes