Dr Johnson knows his stuff. I was treated for external resorption on tooth #29 which required a root canal, grinding away, inserting post, and rebuilding a large part of the tooth due to the deep decay. Since external resorption is a somewhat unknown factor, it remains to be seen if the tooth will stay with me for an extended period (it was done about 2 months ago, so far so good, crown will be done after a gum procedure) he is obviously extremely talented and knows what he's doing. The entire procedure including the shots took about 25 minutes! I thought he was just getting started when I was told "you're all set". On top of it all he is friendly, explains what he's doing and why, and seemed to genuinely care about my general comfort before, during and after the procedure. Even though he is well out of my way in terms of drive and location, I decided I would go based on a recommendation from a friend as I wanted to try and save the tooth by seeking out the best in the field due to the unusual problem. Needless to say I am very happy with the treatment and would see him again and recommend to others without question or hesitation.