(((((Kiya))) I am SO proud of you for going ahead and having the appointment, getting up to go to the bathroom, re-grounding, taking the crystal and being aware most of the time. It is REALLY progress that you could do ALL of this. ALL of it, step by step. I think you did fantastic.
I also wonder why anybody, especially a dentist whose face is in your face thinks he can touch anyone without asking first. This is a big issue for me- strangers touching me or my kids or even my pregant belly when I was preg. Complete strangers. Once I was on a line in the grocery store with my baby in the stroller (my d who is now 6) and a lady in front of my began talking baby talk to the baby and then said"Oh, is that a tooth I see in there?" and she reached over and stuck her finger in my baby's mouth! I swatted her hand away and said "WHAT ARE YOU DOING?" She was lucky I didnt slug her, too.
Anyway, Im proud of you for restraining and not slugging the dentist. SOunds like it was very difficult, but you were able to feel uncomfortable for all that time and not act on it and tolerate the uncomfortable feelings. That is really hard stuff