Alaska - no dental school and it's far
New Hampshire & Vermont - also no dental school
Delaware - no dental school and very strict on licensing
North Carolina - I don't know why this is on the list. I thought a new dental school just opened there so they should have plenty of dentists there if they don't already. Maybe it's on the list because it used to be very hard to get a license there, they had their own exam. But I believe this isn't the case anymore and they accept some of the regional exams and offer licensure by credentials.