convex and protruding philtrum
I see... I definitely see it going on with the first guy.
Here's something I was thinking about previously regarding upward turning of the nose which I think also has everything to do with the chimp lip thing:
When a person has maxillary advancement performed, the maxilla is cut and moved forward as one piece. It is purposely cut as a Lefort I fracture so as to not cut into the nerve endings of the upper teeth. The entire piece is moved forward the same amount, so the top of the cut piece (bottom of nasal cavity) is moved forward the same as the bottom (top teeth).
So if I use two lines, one for upper face and one for maxillary piece that is cut and repositioned, this:
Before:
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After:
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But when a person has a natural (& not ruined by environmental factors),nicely projected maxilla I think there is a more natural curve to it from the upper face like this:
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The only way to try to mimic the natural profile would be to make multiple horizontal cuts into the maxilla and layer them like steps. But that's not possible given nerves and a number of other factors.
I guess what I'm implying/theorizing/whatever is that if enough maxillary projection is achieved via surgery, "chimp lip" and "pig nose" are unavoidable to some degree. Yes/no?