Agree with what James has said in the main.
Something like "dentist dubbo" though doesn't make much sense to me as a name.
Who speaks like that? It is a couple of related words stuck together, people might search for that but it isn't logical as a domain.
So are you more inclined to "dubbodentist" ?
tim
I usually find that when dealing with services, the geo works better as the second word:
"dentist melbourne" 1,600 exacts/6,600 phrase
"melbourne dentist " 390 exacts/880 phrase