I was looking at plastic surgery before-and-after pictures and the question just popped into my head.
There is not plastic in plastic surgery. This comes from a Greek word 'plastikos' meaning to mold or shape. That is why plastic surgery is called plastic surgery, because it is surgery that involves molding and shaping. Now, to answer your question, I believe the only procedures where something 'foreign' can be felt would be any type of silicone implant. Whether that is breast implants, peck implants, buttocks implants or the occasional calf-implant. That being said, it should and most of the time does feel like the body part it is enhancing. So, a breast implant, due to the volume and shape of the implant will feel closely to a natural breast (silicone achieves this more often than saline). Similarly, because it is more dense, a peck implant would feel more like a lean muscle. With regards to body procedures, most of those require removing excess skin or fat-deposits, so nothing would be felt, since nothing is added. This is the same for facial procedures too...aside from a chin/cheek implant. These, due to their size and shape, will feel more like cartilage found in the area naturally. I hope this helps better your understanding? :)
In plastic surgery, at times they use implants, these implants are made of silicone NOT plastic. For example, most rhinoplasty procedures do not include inserting a nose silicone implant, however, some people have a flat nose, a low bridge nose or not a defined nose bridge (African and Asian noses for example), this will lead the plastic surgeon to add a silicone implant. A person can feel this, and if the procedure was not successful, than it can be obvious. Just remember, plastic surgery, does not use real plastic. it is just called plastic surgery.
