A new methodology for the measurement of the root canal curvature and its 3D modification after instrumentation.

Objective: In this study, the three-dimensional (3D) modification of root canal curvature was measured, after the application of Reciproc instrumentation technique, by using cone beam computed tomography (CBCT) imaging and a special algorithm developed for the 3D measurement of the curvature of the root canal.

Materials And Methods: Thirty extracted upper molars were selected. Digital radiographs for each tooth were taken.