[Face Contour Resurgery] Protruding mouth. Afterwards, pin removal surgery

Has anyone removed the pin after a lot of time has passed ? Are there some people who couldn't remove them all? I wonder if there are any side effects. As time goes by, the bone is covered where the pin is, the gum is exposed at the pin, etc. The pin is pierced or there is an inflammatory reaction. I want to have surgery to remove it at a new hospital instead of the old one. Please recommend a good hospital in Seoul.