The use of radiographs as a diagnostic tool has become an indispensable routine in dental therapy. The advent of 3D imaging has provided the dentist with tools that weren’t available to the clinician before, and facilitated interactive image manipulation and enhancement to visualize the area of interest as a 3D volume. Conventional CT is a non invasive method of evaluating certain aspects of endodontic instrumentation such as canal transportation, dentin removal and final canal preparation. Cone beam CT is relatively new three dimensional imaging techniques requiring a significantly lower radiation dose than conventional CT. It provides high resolution and isotropic images in comparison to conventional CT. All these imaging modalities have introduced many potential benefits to dental practice making it simpler and accurate.