Maybe everything in this post will be a normal experience for you. The dentist assured me that this was all standard procedure in Europe. Not being from Europe, this was all new to me and unexpected.
Everything starts off as expected; they open your mouth, take a look inside and call out problematic areas if any.
They may spread a q-tip with numbing gel on your gums.
The dentist might put a big mouth opener in your mouth.
If they are using a baking soda spray to clean your teeth, they will cover your face with a face drape and tuck it in around the mouth opener.