So from what I gather the different between a LF 2 and LF3 would be that, in a LF 2 the sides of the face would be untouched. IMO, that sucks. If you zygos are also recessed then technically youd still look off. They'd have to bring the zygos and upper maxilla forward, without touching the nose.
What I dont understand is that when they advance the lower maxilla in a Le Fort 1, there is still some contant with the upper maxilla. But If they basically move your whole face forward, like in a Le Fort 3, what do they will the space with? Cow bone? or they just leave the space hollow?