I think the only dental questions I was really asked in my interview were about why i wanted to become a dentist. He also asked me if there was anything about dentistry I didn't like, which was kind of tricky. They have a set of questions that they ask you, so its not quite as conversational as some of the other interview formats, but it was still pretty easy. I also got to hang out in the 3rd year clinic for a few hours after the interview which was pretty cool. Good luck on the interview!