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Why would a tooth hurt after root canal treatment?

User Level:
Patient
Posted by: folkNogG  (8 years ago)
Dear all,

I had a root canal done two days ago and now my tooth hurts. When my tongue touches the teeth, I feel sharp pain. Is this an indication that the root canal treatment had failed? The nerve was removed so it should be pain free. If it failed, will the dentist do the retreatment free for charge? Please advise as I am really worried. Thanks everyone for any information!
User Level:
Student
Posted by: ghnane  (8 years ago)
Hello. Since it has been 2 days post the root canal treatment pain and discomfort may be normal. Traditionally people think if a tooth has two roots it will have two canals to remove the nerve and stop any further pain sensation. However teeth have accessory canals that branch off main canals and transmit nerve impulses.

If pain does not subside you should go back to the dentist and have them reevaluate your root canal treatment and make any necessary changes. You should not be charges again.
User Level:
Dentist
Dear all,

I had a root canal done two days ago and now my tooth hurts. When my tongue touches the teeth, I feel sharp pain. Is this an indication that the root canal treatment had failed? The nerve was removed so it should be pain free. If it failed, will the dentist do the retreatment free for charge? Please advise as I am really worried. Thanks everyone for any information!


Two days is not long. Some teeth take a month to settle down. It is premature to assume failure. There is a small chance is could be a post-op infection. Post-op pain comes not from the nerve, but from inflammation in the bone around the tooth root.

Kim Henry, D.M.D.
Posted 8 years ago
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