In endodontic area, there is a common issue for identifying the inserted files inside of the canals at the time of root treatment in periapical x-
Dr. Ali Nankali has suggested a new method how to clarify the inserted files when more than three files are used. This method is very simple and based on the number of stoppers which are fixed on a file. Stoppers are radiopaque in x-
The only requirement for applying this method is to have enough space for usage of more than one stopper.