The thing about 'dream symbols' is I don't believe they are the same for everyone. For instance I'd learned that teeth falling out meant you were talking too much and not listening enough and who knows if that one is correct. It might be a good idea to look at the rest of the dream, and the emotions behind it.
I find your last paragraph interesting, and the fact that you felt the need to add it, could mean something. Perhaps you feel you are not in control.. I mean, at first you couldn't control the fact that your teeth were crooked and you're still angry at the ex... even though it's been six months. (Bit of advice.. let that baggage go.. that's waaay too long to give out your energy to someone who doesn't give a flip about you.. ya know?)
Anyways, I'd go with more of the emotion of the dream then the actual alleged symbol.
Good luck.