I had a cracked molar tooth. My dentist drilled it down and put on a temporary. We waited for a week and the temporary hurt. He decided that I need crown lengthening, which I had done. I went back to the dentist after it healed for three weeks and had an impression for a crown. He had to drill a little more and got another temporary put on as the other one broke. When I got home, I had a terrible pain after the Novocaine wore off. I called him, and he said that I now probably need a root canal. Can I have a root canal a month after crown lengthening? I have to do something. It hurts on the new temporary when I chew and is hurting, in general, all the time. Is root canal the right choice now?