Hi spudbro,
I sent you a pm, but in case you see this first, I just wanted to mention something I thought of... This may be way off but I have read about people having what is called a Chiari malformation (CM1) and gone most of their lives without ever knowing they had it and without any symptoms until sustaining a head injury. Headaches are common with that.

http://www.pressenter.com/~wacma/symptoms.htm

There is another user here called Lizard who might know more about that connection if she sees this post. I can't think of why she's having the teeth problems except that maybe nerves were damaged in her face when the original head injury occurred.

I'll keep your daughter in my thoughts.