Can a "open" root canal be dangerous?

My father said he was going to get my teeth fixed and only got me the root canals. well, i have lost the temp filling and it really hurts. i cant afford the crowns! i did not even have a job when the root canals were done! i have none of the papers.... idk, i think im screwed... the job i have now does not pay me... show more My father said he was going to get my teeth fixed and only got me the root canals. well, i have lost the temp filling and it really hurts. i cant afford the crowns! i did not even have a job when the root canals were done! i have none of the papers.... idk, i think im screwed... the job i have now does not pay me enough. i quit so i could full time look for a better paying job faster. it did not work... i have no money, the bank messed up and shorted me half my pay check... and now i have to deal with this tooth... how do i fix it and what happens if i cant afford to fix it?
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