I went to the dentists again for another filling. I got the impression that he actually did some root canal work. He did some root canal work on my wisdom tooth several months ago. I thought he used the long, thin drill bit a long time, and that he drilled three holes with it. I also saw him put some of those carrot shaped bits of plastic in my mouth. He did not say anything about it being root canal work and I did not see him write anything in the notes about it. The patients can see the dentists notes on a screen. I wanted to ask him about it, but I wondered if he'd be required to charge me more if it was root canal work.