Hi. I went to a dentist, and he said I needed a root canal after doing the cold air test. My pain was escrutiating, and it lingered for about a minute afterwards.
I got a second opinion. The second dentist told me i do not need a root canal. That the pain was due to sensitivity. He knocked on my tooth with a metal instrument. He siad if that would have hurt then I would need a root canal, but it didn't.
By the way, the second dentist said i just need prescription toothpaste, and the sensitivity to hot and cold would go away. Thanks for any help in advance.
I realized that i should also say that that side of my mouth has throbbing pain, but it isn't constant, and it is usually at night. I did tell the second dentist this, and he said it was not due to this tooth. He said it was due to a different tooth. So yeah, I am totally confused on who I should believe.
Get a third opinion with x-rays. I will tell you that the pulp test (bang on teeth) is the most accurate in determining viability of the tooth pulp. It sounds like you do not need a root canal - BUT, I am not sure! So, get another opinion - and you might just have a sensitive tooth. Did you have any injury to this tooth, ever?
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Tooth pain!!!!!!!!!!!!!!!!!! 
