tooth sensitivity months after inlay

I had a very deep filling that my dentist replaced 8 months ago with an inlay. A few months later, I mentioned to my dentist that occasionally when I bit down on something hard, I got a sharp pain in my tooth. He told me that the tooth was just sensitive and that it'll eventually go away. It hasn't gone away and now it has become sensitive to cold drinks and air. Am I going to need a root canal? Or can this be fixed in another way?

[agbee]

It could be:
1) the inlay is too big (high) and needs some correction,
2) there is some problem with the enamel,
3) if not, that's the nerve and in this case you will need a root treatment.
PS: I am not a dentist, just guessing.

[scottma]

I agree with agbee.