PMC3745875_01
(a) Preoperative radiograph. (b) Working length radiograph showing multiple canals. (c) Access opening of the tooth showing multiple orifices. (d) Postobturation radiograph.
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fig1
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)).
CBCT images showing 2 canals in each root.
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fig2
The scans showed two mesiobuccal, two distobuccal, and two palatal canals (Figure 2).
PMC3745875_02
(a) Access opening showing three MB, two palatal, and one oblong distobuccal canal orifices. (b) Working length radiograph. (c) Postobturation radiograph.
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fig3
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)).
CBCT images showing distinct canal configuration.
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fig4
The scans showed three mesiobuccal, two palatal, and an oblong distobuccal canal systems (Figure 4).