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AlwaysHaveQuestions
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@PapiMew you said you have an idea how to make concave after bimax share it broYou avoid this by doing less than 5mm upper jaw advancement, 4mm is enough for 99% of people without severe underbites, and will give enough anteface without ruining your philtrum shape.
LF1 that has been advanced too much gives chimp lip, because it makes the middle part of the philtrum project more than the upper lip and nostril area, making philtrum from side profile convex as opposed to concave.