About 6 weeks ago I had a back tooth prepared for a crown and then had it installed. The prep was deep, any temperature change or even just sitting reading and the tooth was hell for almost a month. I had a root canal a couple days ago - no pain! Brilliant idea - the tooth hurts, so take out the nerve, the tooth still works just as well and I can enjoy eating, breathing, even reading without constant pain. I nominate the inventor of the root canal for a Nobel prize in medicine!