One of my upper teeth in the back part of my mouth sometimes hurts when I eat. Its not a hot/cold sensitivity but it hurts when I bite into food, and it seems to be a certain spot in the middle that hurts. I have looked at it and I dont see any signs of decay...but I was wondering what could be causing the pain??? I dont go back to the densist until September, so I was wondering if anybody else might know what this could be?? So thanks for any help.