The bottom portion of a tooth’s root is called it’s apex. An open root canal means an open apex. When this happens, the pulp of the tooth is exposed to possible infection. If the apex can’t be sealed off with conventional treatments by your Denver dental professional, an apexification may be recommended, to set up a kind of roadblock against bacteria.
Symptoms to watch for include intense pain, sensitivity, or discoloration of the tooth. If any of these things happen, see your Denver dental professional. He may refer you to an endodontist who specializes in the apexification procedure.