When I had my interview at Michigan (like 4 yrs ago), the interview itself was in a very casual informal setting. There was a whole bunch of interviewees there (perhaps 20) and we were all eating and sitting around chatting with current students. Sometime during this part of the day, we talked with the interviewer.
Before the interview/social get together, we were given a tour of the dental school and we had to write a mini essay on the spot.
