a human body implant has a separate bladder made from a bio - compatible flexible polymer into which a mobile device or prosthesis is placed after the bladder has been introduced into a subcutaneous body pocket . the bladder completely forms an artificial scar by ingrowth of body tissue into pores in the bladder to form an artificial scar . in the case of a breast implant , a breast prosthesis of many different types can be used . the prosthesis is isolated from but is mobile in the bladder . fluids can be withdrawn from the prosthesis without contaminating the body .