Is this a cavity
I just notice the other day that my tooth was starting to seem senative to cold. This was something new and it was only for the one tooth. I looked at it closly and it seems to have a hole in it. I is very little not discolor just a little hole I did not notice before. Then again I was not looking for it before. Is this a cavity? I brush my teeth very good two times a day so I just can not understand how I can have a cavity. Can you have a hole in your tooth and it not be a cavity?