I had 3 wisdom teeth taken out at 21 weeks. They reassured me that it was a routine procedure. And everything is fine with baby and myself :)
My dentist told me it's better to get your teeth taken care of because if you don't it could harm the baby because the gums lead straight to the bloodstream which leads to the baby so you want your teeth to be healthy so if getting a root canal is what you have to do you should be happy they're taking Care of it!