Hi Bex,

I have a similar situation. During the mercury removal process, I had a crown removed and there was a large mercury filling underneath it that had to come out. It was filled with composite and a temporary crown put on. I had no issue for a month with a temporary crown. I went back and got the permanent crown, and a few weeks later I started having pain when I flossed that evolved into tenderness in chewing. The dentist x-rayed the tooth and said that it apparently couldn't take all of the trauma and needs a root canal. I have not had it done yet because our insurance was tapped for the year and we were moving. I have to start over with a new dentist or find a way to get back to my old one. On the bright side, the pain has not increased at all; actually it subsided a little. I don't want to part with the tooth, so I will have it root canaled, but I will be sure to have it done with ozone. Good luck; I hope yours is just sensitive.