My implants were 20 years old when I replaced them 3 years ago, saline, over the muscle, with saline over the muscle (my Doctor said I could go under the muscle after so long over) and after six months I had like a bubble on top of each one, never had a problem with my other ones like that..I hated them..you could see it on top of each breast..I under stand ripples but this was way more....