It's great that your dentist took such precautions.

Maybe I was a fool, but I took a list of all the medications I was taking to my dentist a number of years ago, who took one look at it and decided not to provide any numbing for a root canal (of a molar). None whatsoever! And I have a fear of going to the dentist! He had to rebuild the tooth as well because sides of it had broken off. So... yeah... I pulled every cable out that was on my chest and couldn't keep my mouth open (another thing, they don't use these things that keep your mouth open here).