Fillers to Beef Up Area Above Chin Implant?

Hello. I have a small implant that otherwise looks fine; but I find that it causes too much sharpness when viewed at a 45-degree angle--because, unlike with a real larger jaw--only the bottom half of my jaw extends out. I am seeking the "full" look of a larger jaw. I can achieve this with a plumped-up "between-jowl-and-chin area." One PS I saw recommended Aquamid; a non-FDA approved filler. What are your thoughts? Fat injections? Injectable filler? I am afraid to go with Aquamid.