My teeth keep hurting no matter what I eat, no matter how soft it is.
So I go look in the bathroom mirror.
I look and see my filling is gone, but my tooth looks normal.
I think nothing of it.
I look again later, and my tooth has like, dissolved almost.
There's this big gaping hole in my tooth where my gums are all bloodied up.
It hurts like hell.
I tell my Mom, and she says "oh, that's too bad"
But I can't go to the dentist, because we don't really have one.

Then I wake up.

Teeth dreams are very common. Sometimes they are about what you say in public and sometimes they are about personal appearance. It depends on what your concerns were at the time.