since majority of the schools outside the US don't require an undergraduate education before pursuing dental school the main degree that is offered is the B.D.S (Bachelors of Dental Surgery) this degree does not get converted to anything in the US.
If you want to practice in the US you need to "re-do" 2-3 years of school at a participating school. When you graduate the school will determine if you get a D.M.D. or a D.D.S.. I know the following schools have a program for international graduates:
UPENN (DMD)
NOVA (DMD)
Tufts (?)
NYU (DDS)
So, unfortunately you can not practice in the US without going back to school for at least 2-3 years. Hope this helps.
DesiDentist