This has been ongoing for months. I had a root canal and crown many years ago. A few months ago, the dentist said there was a cavity under there, I didn't feel it, having no nerve there. He filled it, put on a temporary crown, I was in pain, he kept filing down the temp, and I figured it would be better in 3 weeks when he put on the permanant crown. I keep going back there, he keeps filing it down and says the x-ray looks fine. (But why does it hurt, I don't have a nerve) Well, now he sees something wrong. I only have a small amount of money left on my insurance and I'm so mad at this nonsense.....now it's absessed, and I have to go to a periodontist, I'm venting, thanks for letting me......I know I'm going to have to have it pulled after all this.