Thank you for taking my question. I had a root canal done 10 years ago on my last lower left molar. Recently I have had pain to heat. I went to my dentist who found a small pin prick size hole in my filling. he repaired it and I was pain free for a week. I could eat all the hot foods I wanted. Now I have the pain again, not as bad, but if I tap on the tooth it is sensitive. doesn’t hurt all the time just a a little sensitive.
Question, 1st how can I have pain after a root canal? And 2nd should I have the tooth extracted and then have an implant? I am at a loss as to what to do. we were getting ready to put a crown on it but I don’t want to spend the money if I am going to have problems with it. thank you.
Frances from New York
Frances,
You’re smart to be concerned about this tooth. The root canal question needs to be settled before you put a crown on it.
A root canal treatment removes all the living tissue inside a tooth. After it is completed, there will be no sensation to hot or cold, because those sensations come from the nerve that should be gone. There can be sensations of pressure or pain to pressure, because those sensations come from the ligament that attaches the tooth to the bone, and that ligament is still alive.
So that means that there was living tissue still inside your tooth. That could possibly be from an extra root that the dentist missed when the root canal was first done. This isn’t uncommon for a lower second molar. The “standard” number of canals in a lower molar is three, but there are often four, and in rare cases there can be more. The pain to heat indicates that the tissue was still alive, but barely. The pain to pressure now could indicate that this tissue has died and now infection is spilling out into the ligament that attaches the tooth to the bone.
I would ask your dentist to refer you to a root canal specialist. My advice would be to save the tooth. After all you’ve invested in the tooth already, it would seem a shame to give up on it now. Yes, you could have it extracted and do a dental implant. But fixing this tooth shouldn’t be complicated. This is the kind of work that root canal specialists do all the time. And I wouldn’t be too hard on your dentist for missing this fourth canal, if that’s what your problem turns out to be. Root canal failure isn’t that uncommon a problem.