Postoperative radiographs of endodontic treatment and follow-up after five and nine months. (A) Post treatment periapical radiograph revealing that the obturation is of good quality. At the five-month follow-up, the extra-oral view (B) shows that the sinus tract had disappeared but left a scar in the right mandibular region. The periapical radiograph (C) shows the healing of periapical tissues. After nine months, postoperative CBCT images of the sagittal (D and E), coronal (F and G) and axial view (H-J)view confirmed the apical healing and adequate obturation. DB, distobuccal; MB, meisobuccal; DL, distolingual; ML, meisolingual.