There are multiple interviewers, however you only get two interviewers at the same time.
I can tell you that some of their questions where standard questions. Some were directed towards your application, why you are a better pick over other applicants, why this school over other instate schools, why did you choose dentistry. There will be like 1 or 2 questions they switch up every year but those are the only two that will make you think.
A tip: for the tough questions, there is no right or wrong answer (that would be unfair). I remember when they asked me a tough question I failed to answer it correctly the first time because i had no idea what they were asking. Midway through my answer they stopped me because i was going off track. So I politely asked them to repeat the question, and for the second time i gave them a better answer.
Surprisingly, you don't have to have a perfect interview. The interview is meant to give you a hard time (they know that), and if you show that you can keep a cool head under pressure then you're good. They want to see that under any circumstance you wont give up. Remember, at any point during the interview, its perfectly fine for them to repeat the question. I would recommend it too, because it shows them that you are trying to give them the correct answer.
Hope that helps at all
