You are right about the prominent ridges with traditional implants. Even when they are custom made or filed down, they can still be felt. Did you receive back your operating report? I would be fascinated to know more.
Try not to think of it as putting dead person inside you. Remember it is quite common to use donor tissues and organs for all sorts of medical procedures. Often people aren't even aware a donor part is being used. I don't see any better way to help other people when you die, then to give your own body if it's usable. If I were hit by a car today and died, it would save several people with my organs and help others with my tissues such as eyes, bone, etc. There's nothing to be ashamed about here. The people who donate these things upon death do it knowing others will be using them, so there's no need to feel guilty about that aspect. However of course it can be frightening to think about it in general so just try not to.
“One popular new plastic surgery technique is called lip grafting, or "fat recycling" wherein fat cells are removed from one part of your body that is too large, such as your buttocks, and injected into your lips; people will then be literally kissing ass.”