I've just been having a look some of your sites. 50ft Etta - I tried to post a comment on yours but it wouldn't let me! I thought the bit about the fairy dying each time you smiled was so sad - awww!
Your bimaxillary osteotomy sounds pretty radical. I have just been reading a blog by someone called Andrea, who had jaw surgery because her teeth wouldn't close at all, and the results are amazing. It's a hell of a thing to go through, but it looks as if the results will be well worth it.
Very best of luck for your bracing appointment. The brace puts a bit of pressure on your teeth, so having a couple of teeth removed beforehand will help. I noticed a real relief in pressure when I had my tooth out.
P.S. I'm sure your little niece Maisie will be fine when her big teeth grow. By the time she's old enough to have anything done, dental treatments will probably have advanced so much that she won't have to go through what you're having.