Fig. 5

Additional examples of stage 1 OD mimicking endodontic periapical lesions. Careful examination of stage 1 OD depicted in CBCT might indicate faint differences as compared to endodontic lesions. For instance, the periapical OD radiolucency could appear slightly more dense compared to the surrounding trabecular space (white arrows in a) and/or can include discrete central hyperdense structures surrounded by a hypodense margin (white arrows in b). Moreover this complex is separated from the regular cancellous bone by a thicker hyperdense line. The whole process can protrude into the compact bone as well (white arrows in c)