TN and dental work

This all began when I had an abscessed tooth pulled, whether or not that was coincidence, we'll probably never know. However, my right side is the one affected by TN, and my left side has begun hurting now, I have an appt that was made before we knew what was going on to have a tooth pulled on the left side and a tooth filled. Since I'm experiencing pain on the left I am assuming (and hoping) that the cavity is what's causing it.

I have two questions related to this issue: First, has anyone had dental work done since they've been diagnosed and what was the outcome. Second, Has anyone's TN spread from the one side to the next?