and just an FYI, it's very important that you have a thorough dentist who will get ALL of the cavity out of a tooth before putting a filling in place...
Sometimes it's not even an issue of being thorough. Sometimes it's how the canals go on the inside. I had a root canal done about 6 years ago. Then about 2 years ago, I had to have a specialist redo that root canal because there was a "rogue" canal (one that couldn't be seen initially) that got infected again.
But then this year, I started having pain in that tooth again, and I went in, and it turned out that the infection in the very end of the canal that wasn't able to be cleaned out had spread to my gum, and I had to have oral surgery to open up the gum to remove the infection. Yay! :cussing: