PMC9458392_01
Preoperative radiograph.
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The preoperative radiograph (Figure 1) showed dental restoration approximating the pulp chamber in tooth #15.
Three canals in the buccal root.
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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).
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.
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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).
(a) Radiograph to confirm the working length, (b) postoperative radiograph.
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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.