Endodontic treatment objective is to restore the tooth to adequate form and function, in health. There are three basic phases in endodontic treatment. First is the diagnostic phase, in which the disease to be treated is determined and the treatment plan developed. Second is the preparatory phase, when the contents of the root canal are removed and the canal prepared for the fiiling material.
The third phase involves the filling or obliteration of the canal to gain a hermetic seal with an inert material as close as possible to the cementodentinal junction