case_images: PMC3518957_01
case_images: An intraoral clinical examination of the mandible did not reveal macroscopically detectable pathologies.
case_images: CRIM.DENTISTRY2012-453415.001.jpg
case_images: PMC3518957_01_CRIM.DENTISTRY2012-453415.001.jpg
case_images: fig1
case_images: Upon clinical examination, the mandibular left first molar (tooth 36) (Figure 1), which had been satisfactorily restored with a conservative restoration, was tender to percussion.
case_images: Radiolucency image of tooth 36 showing a periapical radiolucency in the region of the mesial and distal root apices.
case_images: CRIM.DENTISTRY2012-453415.002.jpg
case_images: PMC3518957_01_CRIM.DENTISTRY2012-453415.002.jpg
case_images: fig2
case_images: A single-tooth radiograph of tooth 36 revealed an enlarged periodontal space and a periapical radiolucency in the region of the distal root of tooth 36 (Figure 2). 
case_images: Root canal orifices after enlargement during endodontic treatment.
case_images: CRIM.DENTISTRY2012-453415.003.jpg
case_images: PMC3518957_01_CRIM.DENTISTRY2012-453415.003.jpg
case_images: fig3
case_images: After access cavity preparation, pulp was removed and three root canals were exposed (Figure 3).