PMC3467118_01
A) Preoperative radiograph showing the presence of additional canal in both 11 and 21; B)11Disto-labial position of additional canal to main canal under 3X magnification; C) Working length radiograph showing presence of 2 separate canals in; D) Post-obturation radiograph of 11
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Preoperative radiograph revealed the presence of a single root with external apical root resorption in right maxillary central incisor with receded pulp chamber (Figure 1A). Louis, MO, USA) under x3 magnification the additional canal was located distolabial to the main canal (Figure 1B). Radiographic working length was determined using ISO 0.02 taper K-files (Figure 1C ). Products, St Paul, MN, USA). Patient was asymptomatic during the 1year follow-up period (Figure 1D ).