I am not a dental student or candidate, but I should be enterin a Canadian med school next year.
1st there are no private dental schools here. Thus provincal government puts restrictions on out of canada (or out of province) applications depending on province.
In general Canadian med schools are extremely competitive to get into. Dental schools are even worse because there are fewer spots.
Your best bet would to check out dental schools in Ontario, Quebec and possibly Alberta. But I would imagine you have a far better chance in the US unless everything you have ever touched is perfect, including your DAT (and I mean PERFECT)