Dental Expenses

I'm a high school senior at the current moment, but there are a few complications -- a few nasty ones and a few not so nasty. Largely, they revolve around my health but my teeth are also a super big thing to worry about. 
I'm in desperate need of a root canal -- at least $880 alone -- as well as a crown -- about another $1000 alone as well -- and various other fillings are needed in about six other teeth. The most pressing of these matters is the root canal and crown because at the present moment, without adequate treatment, the abscessed tooth will result in further infections and complications if it hasn't already.