It's been about 8 years now and I don't think there are any side effects except for a little rattling when I open my mouth wide.
Everyone says that if you contour, it will flow down someday, it's a surgery you'll regret later, but if I hadn't done it at that time, I'm very satisfied because I think I would have lived my whole life with an appearance without confidence.
It is a surgery that requires careful thought and careful decision, but if there is someone like me, I recommend it unconditionally..