I recently went to the dentist and had a root canal done on a (#19 molar) The tooth in question had a deep filling done on it that touched the nerve but was not infected at all. I had very intermittent pain with this tooth. I would go 2 weeks with no pain and then just have one day with pain, and it would go away again. The question is if a root canal was even necessary in this case. Feeling regret about it now.