case_images: PMC6854219_01
case_images: (a) Preoperative orthoradial X-ray; (b) preoperative distal angulated X-ray.
case_images: CRID2019-1857289.001.jpg
case_images: PMC6854219_01_CRID2019-1857289.001.jpg
case_images: fig1
case_images: They showed the presence of one wide canal and the presence of a deep mesial groove (Figure 1).
case_images: (a) Root canal system at the end of shaping procedure. (b, c) Root canal system during final rinse. (d) Canal drying using five sterile paper points.
case_images: CRID2019-1857289.002.jpg
case_images: PMC6854219_01_CRID2019-1857289.002.jpg
case_images: fig2
case_images: After the shaping procedure (Figure 2(a)), in order to assure proper three-dimensional cleaning of the root canal system, the final rinse solutions were activated using EndoUltra (Micro-Mega, Besancon, France): at first, an aqueous solution of EDTA 17% was activated inside the canal for 120 seconds. After rinsing with physiological saline, an aqueous solution of NaOCl 6% was activated inside the canal for 240 seconds (Figures 2(b) and 2(c)). The canal was dried three times using five sterile paper points, arranged in accordance with its palatal-buccal axis (Figure 2(d)).
case_images: (a) Visualization of the apical plug. (b) Backfilling of the root canal system using thermoplastic gutta-percha. (c) Postoperative orthoradial X-ray. (d) Postoperative angulated X-ray.
case_images: CRID2019-1857289.003.jpg
case_images: PMC6854219_01_CRID2019-1857289.003.jpg
case_images: fig3
case_images: In order to perform a tridimensional filling, the tooth was filled using a bioceramic material, MTA Biorep (Itena, Paris, France), creating an apical plug of 4 mm thickness (Figure 3(a)). The remaining part of the root canal was filled with thermoplastic gutta-percha, using EQ-V fill (Meta Biomed, Chungcheongbuk-do, Republic of Korea) in association with a canal sealer (Figure 3(b)). The final radiographs showed a well-obturated canal of this single-rooted maxillary first molar, with a large buccopalatal diameter (Figures 3(c) and 3(d)).
case_images: (a) Preoperative orthoradial X-ray; (b) preoperative distal angulated X-ray.
case_images: CRID2019-1857289.004.jpg
case_images: PMC6854219_01_CRID2019-1857289.004.jpg
case_images: fig4
case_images: The radiographs showed the presence of a deep pulp chamber floor with an unusual anatomy; two canals were clearly detectable (Figure 4).
case_images: (a) Visualization of the oval orifice of the MB canal (arrow). (b) Distal circular orifice and ribbon palatal orifice separated by a deep isthmus (arrow). (c) Isthmus shaped using sonofile.
case_images: CRID2019-1857289.005.jpg
case_images: PMC6854219_01_CRID2019-1857289.005.jpg
case_images: fig5
case_images: P canal and D canal were separated by a deep isthmus (Figure 5).
case_images: (a) Intraoperative orthoradial X-ray using verifiers. (b) Postoperative angulated X-ray. (c) Intraoperative photo with verifier. (d) Intraoperative photos after Thermafil filling.
case_images: CRID2019-1857289.006.jpg
case_images: PMC6854219_01_CRID2019-1857289.006.jpg
case_images: fig6