Well, your entire body changes when your weight changes - including your hands. But the extremities are usually the least affected: nature, being clever, avoided designing precision tools like hands and feet with fat stores that could get in the way.
One side effect you need to watch out for is dry skin: I had huge problems with that as I dropped weight, and I still do to this day. No impact on your implants, apart perhaps that they’ll show more under the parched skin, but I just thought I’d mention it