Do your teeth constantly shift?

Depends: Rapid movement of teeth without orthodontic forces is a sign of a greater problem, like advanced gum disease. That being said teeth can shilf over the course of your lifetime..It is usually very slow but it happens.

Yes: Teeth are not solidly connected to the jawbone, but rather suspended from ligaments. Any inflammatory process will cause minor shifts. If you have spaces, like missing teeth, or if your bite is not properly aligned, teeth may shift.