I am terrified to come back if I ever need a cortisone injection for fear that I'll end up once again having that needle inserted when I'm not numb. All I want for myself and people like me is a system to give us more time to get numb, test us to see if we are, and then proceed. People like us are only 1-2% of the population so I understand things are not set up for us normally.
It takes 30 minutes in the dentist's office for me to become fully numb. I had given you all that info in advance. I don't know what more I need to do to communicate my needs. I'm happy to wait outside the treatment room while the anesthetic takes effect.
There are studies you can find.
(I got cut off by the limit with that last sentence in their message center.)