I used to have really bad dentist anxiety, so my teeth got pretty bad before I finally saw someone. My dentist prescribed some kind of twilight drug before my procedures, so I could still respond to commands, but I'd have no memory of the event. I've had two root canals and the surgeon had me use the same drugs for both procedures. I don't know if that's a viable option, but I don't think I could have done them without.

Otherwise, when you go in for your consult, be honest about your anxiety. If you don't want to hear the details of the procedure, tell them that. They have to inform you of risks, but they don't have to go into detail about the procedure. I brought in headphones, which helped me calm down until the drugs kicked in, though, oddly, I can remember the music I woke up to and not much else. I was so scared in the days leading up to the first procedure, but the pain relief was so great that I'm glad I did it. If nothing else, focus on that.