I had my chin implant placed 5 years ago, intraorally. Not only am I unhappy with the way it looks, but it still causes pain and discomfort. When I smile it pushes my lower lip up causing it to look firm and unnatural. You can clearly see the outline of the implant when I smile which my plastic surgeon attributes to "strong smile muscles". I still have numbness on one side and often drool without noticing on that side. Lately, it causes pain when eating as well.