I went to a maxillofacial (jaw) surgeon when I was 36; my lower jaw needed to be advanced, as it was too far back and I could not chew well and was in constant discomfort. The dental surgeon twisted my face and ruined my smile. I have lived in hell ever since.
No other surgeon ever gave me a diagnosis or explained what the first surgeon had done wrong or explained what it would take to truly correct what he had done. Many surgeons operated on me, but no one addressed the main problem, which was that my smile was utterly destroyed. If you e-mail me, I will send you the photographs of what was done to me.