case_images: PMC11287040_01
case_images: Mandibular second premolar; A) Preoperative radiograph; B) Working length confirmation radiograph; C) Master cone confirmation radiograph; D) Postoperative radiograph
case_images: IEJ-19-228-g001.jpg
case_images: PMC11287040_01_IEJ-19-228-g001.jpg
case_images: F1
case_images: Radiographic evaluation of the tooth presented an anomalous root canal morphology of two roots with taurodontism (Figure 1A). The working length was determined with an apex locator (DemPex apex locator, UK) and it was established by a periapical radiograph (Figure 1B).  AH-26 sealer (Dentsply DeTrey, Konstanz, Germany) in the apical region and vertical obturation of the main root trunk, using the Fast fill obturation system (Eighteeth, Changzhou, China). A postoperative radiograph was taken (Figure 1D), and the patient was referred for permanent restoration.
case_images: CBCT views; A) Coronal view; B) axial view
case_images: IEJ-19-228-g002.jpg
case_images: PMC11287040_01_IEJ-19-228-g002.jpg
case_images: F2
case_images: The axial images of CBCT exhibited the third canal in the taurodont second premolar with furcation involvement (Figure 2B). The coronal image presented the three canals, branching 3-4 mm apically (Figure 2A). By the axial image of CBCT (Figure 2B), two root canals were located in the buccal root and one root canal in the lingual root.
case_images: Mandibular second premolar; A) 6-month follow-up radiograph; B) 6-month follow-up photograph
case_images: IEJ-19-228-g003.jpg
case_images: PMC11287040_01_IEJ-19-228-g003.jpg
case_images: F3
case_images: At the 5-month follow-up session, it was clinically and radiographically asymptomatic (Figures 3A, 3B).