re: Epstein dentist chair. I spent quite a lot of time looking into it, repeatedly watching the video etc. It seems that he had a bank of machines that looked a lot like dentists drills but MAY have been for beauty rather than dental work.
I see a hairdryer amongst other things but no drills etc. (pic 1 related)
As for the chair - it is just a normal chair and does not have the usual head and footrests one might expect to see on a dentist's chair. It doesn't even have a back. It's more like an ottoman… (Pic 2 related)
Finally, I did a search for "Beauty Salon Equipment" and found the following images of "steamer stations" that look very similar to the unit in Epstein's bathroom. (pic 3 and 4 related)
Discern for yourself of course but, for me, I see no evidence that Epstein was into some sort of Marathon Man-style dentistry torture. Seems more likely he was enticing girls into his bedroom/bathroom with the promise of a makeover rather than mutilation/cavity removal.
Just sayin'