How would a person who goes to the dentist every six months for cleanings/check-ups/etc know what their dentist does on her time off? As far as I know, my denti

How would a person who goes to the dentist every six months for cleanings/check-ups/etc know what their dentist does on her time off? As far as I know, my dentist shows up 10 minutes before I do and leaves 30 seconds after. I just don't think a profession exists with the rigid structure you propose.