i call into question your koalifications for enjoying the internet without experiencing Mad™ I did not know you speak of my language.😉
of course you can. but some would say that in a "conservative" or "traditional" environment, something a dental school could very well be considered, a black suit is less than ideal.
anyway, the rules aren't hard and fast nor are they heeded 100% of the time. most interviewees are in their early twenties and barely know a thing about business attire, so nearly everyone gets a pass on the black suit issue. however, if you can help it (ie: buying a suit just for your dschool interviews/visits), don't get black.