case_images: PMC4037261_01
case_images: Pre-operative radiograph where radix is not visible
case_images: jod-11-118f1.jpg
case_images: PMC4037261_01_jod-11-118f1.jpg
case_images: f1-jod-11-118
case_images: Two other radiographs with different horizontal angulations were made that showed the presence of an additional lingual root (Figures 1 and 2).
case_images: A second preoperative radiograph of tooth 46 taken with a more mesial angulation and revealing the presence of lingually located additional distal root.
case_images: jod-11-118f2.jpg
case_images: PMC4037261_01_jod-11-118f2.jpg
case_images: f2-jod-11-118
case_images: Two other radiographs with different horizontal angulations were made that showed the presence of an additional lingual root (Figures 1 and 2).
case_images: Access opening showing the distolingual orifice in the mandibular right first molar.
case_images: jod-11-118f3.jpg
case_images: PMC4037261_01_jod-11-118f3.jpg
case_images: f3-jod-11-118
case_images: Farther away from distal root canal orifice a fourth disto-lingual canal orifice was found (Figure 3).
case_images: Working-length radiograph
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case_images: PMC4037261_01_jod-11-118f4.jpg
case_images: f4-jod-11-118
case_images: The canal lengths were determined radio-graphically with K file ISO size #15 (Figure 4) and electronically with Root ZX, (J.
case_images: Master-cone radiograph
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case_images: PMC4037261_01_jod-11-118f5.jpg
case_images: f5-jod-11-118
case_images: Proper fitting of cones was evaluated by the master cone radiograph (Figure 5).
case_images: Post-obturation radiograph
case_images: jod-11-118f6.jpg
case_images: PMC4037261_01_jod-11-118f6.jpg
case_images: f6-jod-11-118