For a Canadian, the only school they have a good chance of getting into, is their own local provincial dental school. Outside their province, it is EXTREMELY hard to get accepted in another province, they usually only take less than 3 or 4 students. Schools here place a higher priority on local students. For this reason, Canadians turn to US (esp.Private) schools, which accept people regardless of their place of residence.
There are far fewer Canadian schools (8 or 9 i think), and they usually have a lot less seats (40-60ish).
Getting accepted into a Canadian school is possible, but very hard... for the reasons i mentioned. In any case, why would you want to! I think the US offers way better education because of the oppurtunity to serve a larger patient pool...