I had always had great dental health up until a year and a half ago--around the time my Crohn's first started. I went to the dentist for a routine cleaning and I was told I had gingivitis. I about fell off the chair! I have always been anal about having clean teeth and that really shocked me.
The past two months, my teeth have been VERY sensitive. Cold hurts, hot hurts, anything not luke warm pretty much hurts. I have been using Sensodyne toothpaste and not noticed a difference.
I went to the dentist last Tuesday and let me tell you, it was pure hell. The plaque scrapping hurt so bad and I could tell my gums were bleeding like crazy. This is gross, but you know how you can taste the blood? Yeah...
When the dentist came in, he said my teeth still look ok but my gums are very irritated. I also mentioned to him that I was on prednisone and he said that can impact the teeth. I think the disease itself can probably have an impact, because we can lose vitamins and minerals and may not be able to eat enough to replace what we have lost.
I have been told that since we have an inflammatory disease, it can affect us pretty much anywhere, gums included.
Best of luck with your root canal and I am so sorry you are going through all of this!