Q. Hello, I recently had two fillings done, one in a middle tooth and the other in a back tooth. After 24 hours the back tooth was causing excruciating pain so long story short i got an emergency appointment and the back filling was removed. I am now to have root canal treatment done. But was wondering firstly if my dentist should have known that my root was exposed and that putting a filling on top would have caused so much pain and secondly if root canal treatment will hurt? please reply