As far as I understand orthotropics, the central problem generally is a shrunken/recessed maxilla, and mewing and/or appliances serve to correct this. What happens to the lower jaw though, assuming the maxilla expands according to plan? Will the mandible on a face with significant dystrophy be physically warped or smaller than a normally developed one, or is it usually the same size/shape and can just slide up into position now that there's room for it? As it's a single bone, there isn't any possibility to expand it without surgery, right? If a person were to correct most of the maxilla problem would there be residual problems with the development of the lower jaw, and are they fixable or not really?