How To Determine a Root Canal?

I'm trying to figure out if a tooth next to a tooth that just had a root canal, needs a root canal also. My friend works for an endodontist. She is out of town so I can't call her. She put ice on my tooth when she was here, and nothing, (but that's the tooth that the dentist did the root canal on and said she was certain it was the correct tooth). She did the ice test on the tooth next to it also and OUCH!. So the tooth that I felt nothing on didn't hurt at all. The tooth next to it hurt like mad. So how do I know that the tooth that hurt like mad doesn't need a root canal either? Dentist said it doesn't. The xray is hard to tell... there's too much shadowing going on to see if the pulp is effected or not. I am on a second round of antibiotics because the pain returned a little after the root canal and my last round of antis ran out. So how can I determine that I am not in need of another root canal on the tooth next to the one that just had a root canal? I'm so tired of this. Help!

How To Determine a Root Canal?
When you've had a cavity for a long time.
Reply:It's possible it's just an abscess left over by the actual tooth that had the root canal. The abscess can sometimes come back and would be felt around the neighboring teeth.
Reply:Many people have deferred pain. But just from the sound of it, and if that tooth in question is sensitative to hot %26amp; cold and the pain last for more than 20 seconds you may need another root canal. Go to the Endodontist (not a general DDS) and have him take another x-ray from a different angle. Have him to the hot %26amp; cold test. And let him give you a diagnosis. It is not normal for you to have that much pain.

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