I need a crown on a tooth but it is very expensive. Do denturists in Ontario make crowns?

No, denturists in Ontario do not make crowns; that is a little more specialized then dentures. Crowns have to be fitted exactly to the surface of the tooth they are going on; actually two fittings.

If you need crowns or pemanent bridges, you can't get away from the cost and no sense in shopping because they are all about priced the same.