You’re sitting on the “comfy chair” and your mouth is wide open. Your view is partially blinded by the strong light and your glasses, if you wear them, are probably dirty. In any case, you can just look right up in front of you and asked not to articulate your neck. You feel a part of your body itching and the chair is not so comfortable after all, because after a while your back muscles begin go get painfully stiff. He handles some high-precision (at least you hope so) tools that vibrate at mostly ultrasonic wavelengths.
Basically, you’re totally powerless and the communication is all from his side. He’s the one that has to gain your trust. He’s the one that needs to take off your stress as much as possible by showing he has full control of the situation. You hope he’s not just a good actor, but being a dentist is probably also about acting a little bit.
So, how does your dentist attempts to have you loosen up a bit and get your sitting time less unpleasant? Has he a good sense of humor, or is he talkative about what’s going to happen in your mouth? Is music playing, or are there other distractions for you to focus on while he does his job? Were you able to guess the breast size of the female assistant by the end of your session?