A dream dictionary said this which I like:

"Even though teeth dreams can be somewhat scary there is a message to be taught in everyone. Dreams of this nature implies that we are not paying attention to what need to be fixed in our daily life’s and it is coming out in this form. The dreams might continue if you sweep the issue under the rug. Keeping a dream journal over time help you remember your dreams in more detail and will help you pin point where the problem is coming from. The more you remember the easier it is to find the answer."

From: Teeth Dreams | What Do Teeth Dreams Mean | Loosing Teeth | Broken | Falling| Teeth Dream | Teeth symbol |Teeth Dream Interpretation

I use to have a lot of teeth dreams when I had my braces (when I was 29 and 30); you haven't had any actual dental work lately have you, been worried about your literal teeth, health, or anything like that?