the dental buildings are on the south campus, which is only 5-10 minutes away from the north campus (not far). if you want the very rad T1 internet connection, then Flickinger court might be your best option, or a studio apartment on the North campus (i gave you the link already). there has been talk that they might build some apartment complexes on the south campus for the med/dental students, but that won't happen for another 2 years probably.
apartments near the south campus (dental buildings) are hit and miss. you might get a nice house and great landlord, and then again you might be unfortunate to get a run down place that the landlord would care less about. most of the houses/apartments are pretty run down. the apartments around there are in an area known as the University Heights District: known for it's rivalry between frat houses and non-college residents: avoid those areas (i could talk endlessly about the situation in this area, but i'll spare you
there are town houses and apartments near the north campus in tonawanda: near Chestnut Ridge Drive. also, affordable apartments are also located closer to the south campus -- called Princeton apartments on Brant Street: a quieter place than the University Heights District.
so, your decision on where to live would be how important a nice, stable place with a fast internet connection and network (piracy, mp3's, etc.) are. if they are, student apartments are ideal (dorms are a bad idea). if you don't mind the modem and want to spend less money on rent, then the Princeton apartments or Tonawanda apartments would be the best option.
This site is a searchable database for current available apartments. it may or may not help. i work for a component of the organization so i know they might not be entirely reliable
but, it will give you a place to start.
http://www.subboard.com/och/index.asp