PMC3099122_01
(a) Preoperative radiograph of maxillary left canine. (b) Image showing access opening. (c) Working length radiograph using cone shift technique. (d) Master cone radiograph. (e) Post obturation radiograph. (f) CT scan image showing two obturated canals
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Pre-operative radiograph shows radiolucency involving dentine in distal surface and also showing two separate radiolucent lines running till middle third of the root suggestive of two canals [Figure 1]. Further modification and exploration in the access cavity demonstrated the presence of a different canal orifice, lying palatal to the main canal [Figure 1b]. Working length was determined by placing H file # 20 in buccal canal using apex locator (Tri auto ZX ,J morita; USA) and K file # 15 was placed in the palatal canal, radiographic image was taken, it was found that the palatal canal joined the buccal canal just in the apical third of the root (type II configuration of Vertucci classification of root canal configurations) [Figure 1c]. After the final irrigation with 2% chlorhexidine, the canals were dried with paper points and obturated with ProTaper Gutta percha using AH Plus sealer [Figures 1d and 1e]. The patient was recalled after one week and found to be asymptomatic and CT scan was taken for visualization of canal system(Vertucci Type 2) [Figure 1f].