Q. Two years ago I went to the dentist for my regular scaling and check up. My dentist told me I had a cavity and thus would need a filling. I got my scaling and my filling done that day. He then told me to come back if I feel discomfort in my just-filled tooth (which I thought was weird because fillings aren’t associated with post-procedure pain). My tooth did hurt a bit, but I thought I’d survive, so I didn’t go back to my dentist for about a year and a half. Now (it’s been 2 years since I got the filling) I find myself getting a root canal. Can I please know exactly why my tooth got so sensitive, when, before the filling and discovery of the cavity, my tooth was absolutely fine (feeling wise). I feel as if the dentist I got my filling from did something wrong. That tooth was sensitive to hot and cold things from time to time, but I could survive. Was is a good choice to have got a root canal anyway? I am regretting having done this, and now I’m wondering if I really needed it. Thank you, Jessica