What I've been told by a surgeon is that the position of the lower teeth will determine the position of the upper teeth. That said, I do wonder what range of movement of the lower teeth is possible with a given lower jaw position. I wonder, for instance, if the central lower teeth can be brought backward orthodontically, and the lower jaw moved forward, to create a more oval/squared arch form rather than a V-shaped arch form. I definitely want to maximize that impact for myself in forthcoming revision surgery.