Successful individualized endodontic treatment of severely curved root canals in a mandibular second molar: A case report

Figure 1 Initial clinical situation (#37). A: Photograph of the mandibular second molar; B: Preoperative periapical radiograph of the molar; C: Measurement of the radius of the curvature and angles; D and E: Sagittal (D) and coronal (E) dimensions obtained from cone beam computed tomography (CBCT); F-H: Axial dimensions obtained from CBCT; I: Three-dimensional reconstruction of CBCT images presenting the perforation of the lingual cortical plate. White and yellow arrows represent the mesial root canals and a distal root canal, respectively; orange arrows show the regions of large periapical radiolucency.