How difficult is it to remove a porex chin implant from 2003?

I had an implant placed on my chin through the mouth. A few years ago, it shifted and now my chin looks kinda pointy, face looks longer, and from the frontal few, the left side appears flatter kinda sloping down. When I smile, my chin goes straight down and it's not attractive in pictures. There's no definition when taking frontal pictures. I'm considering genioplasty, but want it to look natural. What are the long term risks with getting this done? I'm in my 40s.

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