Need more info first,,,what province are you in???I am not sure but I think as long as you have a Ontario address you are covered,I thnk that's the way it is in Ontario anyways not sure about the other provinces.
I do believe it's ... 4 years for your bachelor, (premed), pretty sure you can write the MCATs your 3rd year though 4 years of med school 3 years of residency
School to become a dentist usually lasts 4 years, including two years of treating patients under supervision. If you want to specialize, it takes another 2 years.