I have a filmmaking shot in mind so I interpreted it as a zoom accompanied by the Psycho strings as heard in the shower scene! Only because dentists scare the crap out of me. I haven't been to the dentist for 20 years now. In fact the last teeth-related person I saw was the orthodontist who had just taken off my braces, I didn't even go back for the final couple of visits which means there is a small metal bar still holding my four bottom front teeth together. It's never been removed and has been there for pretty much the past 20 years.
(Nice lens by the way...! Sharp enough to read the little signs in those crops)