case_images: PMC3745875_01
case_images: (a) Preoperative radiograph. (b) Working length radiograph showing multiple canals. (c) Access opening of the tooth showing multiple orifices. (d) Postobturation radiograph.
case_images: CRIM.DENTISTRY2013-406923.001.jpg
case_images: PMC3745875_01_CRIM.DENTISTRY2013-406923.001.jpg
case_images: fig1
case_images: The radiographic examination revealed a radiolucent lesion on the mesial aspect of the crown extending to the pulp (Figure 1(a)). There seemed to be 2 distinct orifices in all the roots (Figure 1(c)). At the next visit, the working lengths of each canal were estimated by an electronic apex locator (Propex II, Dentsply) and confirmed with a radiograph (Figure 1(b)). The canals were dried and obturation was performed using cold lateral compaction of gutta-percha (Dentsply Maillefer) and a resin-based sealer (AH Plus, Maillefer, Dentsply, Konstanz, Germany) (Figure 1(d)).
case_images: CBCT images showing 2 canals in each root.
case_images: CRIM.DENTISTRY2013-406923.002.jpg
case_images: PMC3745875_01_CRIM.DENTISTRY2013-406923.002.jpg
case_images: fig2
case_images: The scans showed two mesiobuccal, two distobuccal, and two palatal canals (Figure 2).
case_images: PMC3745875_02
case_images: (a) Access opening showing three MB, two palatal, and one oblong distobuccal canal orifices. (b) Working length radiograph. (c) Postobturation radiograph.
case_images: CRIM.DENTISTRY2013-406923.003.jpg
case_images: PMC3745875_02_CRIM.DENTISTRY2013-406923.003.jpg
case_images: fig3
case_images: The distobuccal orifice also seemed to be indicating multiple canal system (Figure 3(a)). At the next visit, the working lengths of each canal were estimated by an electronic apex locator (Propex II, Dentsply) and confirmed with a radiograph (Figure 3(b)). The canals were dried and obturation was performed using cold lateral compaction of gutta-percha (Dentsply Maillefer) and a resin-based sealer (AH Plus, Maillefer, Dentsply, Konstanz, Germany) (Figure 3(c)).
case_images: CBCT images showing distinct canal configuration.
case_images: CRIM.DENTISTRY2013-406923.004.jpg
case_images: PMC3745875_02_CRIM.DENTISTRY2013-406923.004.jpg
case_images: fig4
case_images: The scans showed three mesiobuccal, two palatal, and an oblong distobuccal canal systems (Figure 4).