case_images: PMC9458392_01
case_images: Preoperative radiograph.
case_images: CRID2022-8991579.001.jpg
case_images: PMC9458392_01_CRID2022-8991579.001.jpg
case_images: fig1
case_images: The preoperative radiograph (Figure 1) showed dental restoration approximating the pulp chamber in tooth #15.
case_images: Three canals in the buccal root.
case_images: CRID2022-8991579.002.jpg
case_images: PMC9458392_01_CRID2022-8991579.002.jpg
case_images: fig2
case_images: An ultrasonic working tip (ET20, Satelec, France) was used to remove part of the dentin; four root canals were found, three of which were in the buccal root and had a common orifice, and one was in the palatal root (Figure 2).
case_images: Cone-beam computed tomography images. Horizontal sections at (a) orifice level, (b) midroot level, (c) apical level, and (d) sagittal view reveal a type 1-3 canal.
case_images: CRID2022-8991579.003.jpg
case_images: PMC9458392_01_CRID2022-8991579.003.jpg
case_images: fig3
case_images: CBCT (NewTom, Italy) because of the morphological variation in tooth #15 to avoid missing other canals. CBCT showed that the root canal was trifurcated at the middle third of the fused buccal root, and the palatal root contained a single independent root canal (Figure 3).
case_images: (a) Radiograph to confirm the working length, (b) postoperative radiograph.
case_images: CRID2022-8991579.004.jpg
case_images: PMC9458392_01_CRID2022-8991579.004.jpg
case_images: fig4
case_images: Master gutta-percha cones were selected for all canals (Figure 4a), and the canals were obturated using iRoot SP (Innovative BioCreamix, Vancouver, Canada), using the single-cone technique. A final radiograph (Figure 4b) was taken to confirm the completeness and extension of the root filling.