dentist and medical should be in a nice clean medical building.
this may be a regional thing, but here we don't find dentists in medical buildings, and they're not often in group practices.
Dentists here are generally individual practices - either in malls or in little old houses they've renovated or in their parts of their own homes. I've seen a few practices with 2 or 3 dentists, but that is quite unusual in this part of Canada.
Occasionally, you will find dental surgeons in medical buildings, but again that's not common.