Pain Under Crown Months After Root Canal?

I had a root canal performed on one of my molars in November of 2012. They covered the tooth with a porcelain crown. 8 months later I am experiencing extreme sensitivity to cold and a constant throbbing. Every couple of days I have a shooting pain that subsides with the help of ibuprofen. Is it possible that my root canal wasn't completed properly of thoroughly? Or are these signs of an infection under the crown?

Doctor Answers 8

Tooth Pain After Root Canal

Though it is rare, there are times when a tooth that has had a root canal can produce discomfort.  One of several things could be happening.

1.  The tooth has an accessory (extra) nerve that is small and perhaps was not found.

2.  The tooth has a crack that is usually between the roots.

3.  The existing crown may not be fitting as well as it could.  

I would have your dentist do an evaluation and take an X-ray.  He/she can then give you  possible causes of the pain and solutions to correct it.  Good luck.   

Houston Dentist
5.0 out of 5 stars 13 reviews

Delayed in tooth with root canal and full crown

If the pain/sensitivity was immediate after placement of the crown, I would say it likely would be due to a biting interference and I would return to the treating doctor to have the bite on the crown adjusted.  Since you say the pain didn't begin until 8 months later, it is likely a problem with either the root canal treatment (untreated root or unresolved infection) or a possible root fracture.  To be sure, I would recommend returning to the treating doctor for an updated x-ray film in order to properly diagnose the problem.

Pain Under Crown Months After Root Canal?

It sounds like one of the nerve canals was overlooked, or incomplete removal of found nerves. Have your dentist take an xray for signs of infection and have the rootcanal redone right through the crown.

Murray Bruckel, DDS
Norwalk Dentist
5.0 out of 5 stars 6 reviews

Pain under crown with root canal

You should not be having temperature sensitivity under your crown with a root canal. It is possible that one of several things may be happening.

1. There may be an accessory canal that the original canal did not treat.

2. It also may be another tooth in the area of the root canal. 

Have your dentist do a temperature test of the adjacent teeth to verify the exact location.

Can tooth still hurt after root canal?

When a tooth hurts after root canal, Several factors may be involved . If temperature sensitivity or pain exists, its either another tooth next to the tooth in question, or an accessory or main nerve still exits in the tooth and the root canal needs to be retreated. If temperature does not cause any throbbing pain then a crack in the tooth, and a in ill fitting crown could cause it. 

I suggest you first see a root canal specialist.( endodontist)-

Good luck



Soheyla Marzvaan, DDS
Orange County Dentist
4.3 out of 5 stars 6 reviews

See an endodontist

Hard to say what is happening.  It is possible that the tooth is cracked and not savable.  But before you extract it, you should see what is up.  Best to be seen by an endodontist.

Lance Timmerman, DMD, MAGD
Seattle Dentist
4.3 out of 5 stars 6 reviews

Pain after root canal

It is difficult to say without an exam but there may be many different kinds of issues.  The crown could be to bulky or not fitting well. The root canal can be incomplete. The pain may even be coming from another tooth. I would see your dentist immediately to resolve this issue so that you do not continue to remain in pain.

Lilya Horowitz, DDS
New York Dentist

Pain under crown after root canal.

It is possible that one of the canals was missed when the root canal was done if the tooth is sensitive to cold.  It is also possible that an adjacent tooth is causing the sensitivity.  It can be very hard to localize pain from cold because of the type of nerve fiber that perceives the pain.  

Ira Shapira, DDS
Chicago Dentist
5.0 out of 5 stars 3 reviews

These answers are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.