case_images: PMC9348962_01
case_images: Radiographic findings. (a) Panoramic radiograph taken after the endodontic treatment of teeth #25 and #26 showing complete obturation of the roots except for the buccal distal root canal of #26. (b) Frontal plane of the preoperative computerized tomography (CT) scan revealed opacity extending from the left maxillary sinus to the left frontal sinus. (c) Frontal plane of the postoperative CT scan showed patency of the nasoantral window and the clearness of the left maxillary sinus and the left frontal sinus two years postoperatively.
case_images: CRID2022-1614739.001.jpg
case_images: PMC9348962_01_CRID2022-1614739.001.jpg
case_images: fig1
case_images: Panoramic radiograph suggested that the root apex was exposed to the maxillary sinus (Figure 1(a)). Computed tomography revealed opacification extending from the left maxillary sinus to the left frontal sinus (Figure 1(b)). The nasoantral window was open, and the causative teeth were preserved (Figure 1(c)).