Will placing a chin implant in a 45 degree angle cause more or less bone erosion?

I want more volume in the 45 degree of my chin. So it looks longer and I want it to be as pointy as possible. No width. Can the implant be placed like that, under the thickest point of the bone? Will this cause more or less bone erosion? Possible to cause a small gap between implant and chin bone to prevent erosion? I'm naturally very round and have a short chin seen from the front view. Ive been satisfied with 1,5-2 ml of HA fillers there, but want more projection and lasting bc fillers sags.