I don't remember exactly but I wouldn't be worried about. I don't consider myself a good writer, but I would say I am below an okay writer. Also, my handwriting looks like a child's handwriting--I print. So, if I can do well and get accepted, you can do well too. My advice would be stay current with news dealing with dentistry and technology. As far as to prepare, use the interview section on here, and get your friends or your academic enrichment center to do a mock interview with you. Also, look at the website, see what attracts you about UB and make sure to bring that up in the interview. Get a good night's rest (I didn't), but was able to pull it off. My biggest advice: relax, ask questions, talk to everyone (the other interviewees as well), visualize that you want to go to Buffalo. Buffalo is an awesome school, the only negative is the weather.
Mask667
P.S NO MATTER WHAT HAPPENS just CHILL and be CONFIDENT