Tropicalwind,
There's not such thing as an off-shore dental school, as it is in medicine. So you have to realize that if you go dental school outside of the US/Canada, you'll have to come back and go trough this ordeal as anyone else, no matter where you went to school.
As for Caribbean dental schools.... well, most Caribbean countries have their own dental schools, a good portion of them in Spanish. But I'm sure you can be able to find some in English too, in the English speaking islands. Just do some search.
Puerto Rico has its own dental school and it's ADA aproved. There you go, an ADA school on the Caribbean, isn't it great?
Good luck!
oh, btw, I went to school there, 'cause I'm from there. Caribbean I mean.