How would i be able to tell if i have any permanent teeth left?

Exam and x-ray: It sounds as if you've been through multiple extractions in your past. I have several patients who have been through similar circumstances. The one thing to keep in mind- is that just because the tooth may not be visible in the mouth, doesn't mean that the entire root has been removed. If the tooth has broken off at the gum line, then there is still a remnant which needs to be removed.

X rays?: It sounds like you can't see any teeth when you look into your mouth. Xrays will show if there are any teeth impacted under the gum.