Hello, my problem is: the 4th right side upper tooth became quite
sensitive (reaction to cold and hot) a while ago, so my dentist took an x ray and didn't see anything wrong with it. He also referred me to a dental surgeon, who also said he couldn't see anything wrong. Then the tooth got worse, so the dentist took the nerve out, did the root treatment, took another x ray which shown it was done properly and told me to come back 7 days later to get a permanent filling.