Can you do root canal filling in bleeding canals?

Yes. That just means the tooth is still vital (or alive). If the tooth is opened and the canals aren't bleeding this means the tooth is neucrotic or dead. The tooth has no more nutrients going to it, meaning the doctor will clean through and though, using files all the way out of the canal to clear any bacteria. If the tooth is bleeding, there isn't a need to go out of the canal, to the end or a mm short is okay. Bleeding will stop once the nerves are removed and bleeding can also be caused if the doctor is out of the canal. He can use anesthetic to stop the bleeding or drying paper points.