Let's see...
1) applying to dental school
2) interview at dental school
3) essay at dental school
4) I wonder what they will ask me...
probably something about law school, yeah, law school! I would buff up on your LSAT questions for your PITT interview.
seriously:
1. Why dentistry?
2. What would make you a good dentist?
3. A Jihad terrorist with an abscessed fistula comes in to your office, do you treat him before you call the police or after, or do you refer him to a specialist and let him decide?
4. How do you treat a child vs. a grandma?
all very easy to answer.