All of us with TN should read the entire link to get a better understanding of what research is being done to find a cause and a cure.
By reading this it will give you a better understanding of where the mind set is with researchers on looking for a cure.
Dr. Burchiel was at the Facial Pain conference in San Diego a couple of weeks ago and talked about this. Was very interesting. He said initially he followed patients for five years and they seemed to do well for the most part, but as you went to the ten year mark, relief was dramatically decreased for most. He aslo wondered about the connection of more females having it than males. (of course there are always people that don't fit in the box and have been without pain for 20 years, we had one guy there).