case_images: PMC4372793_01
case_images: Preoperative radiographs: A) periapical; B)  tracing with gutta-percha and C) occlusal view
case_images: iej-10-148-g001.jpg
case_images: PMC4372793_01_iej-10-148-g001.jpg
case_images: F1
case_images: An occlusal radiography confirmed the extremely large diameter of the lesion (Figure 1).
case_images: PMC4372793_02
case_images: PMC4372793_03
case_images: Post treatment radiographs: A) immediately after CH therapy; B) one week later (CH washing out) and C) CH replacement
case_images: iej-10-148-g002.jpg
case_images: PMC4372793_03_iej-10-148-g002.jpg
case_images: F2
case_images: One week later, the intracanal medicament had washed away (Figure 2) and the sinus tract was still present. Tokyo, Japan). Two weeks later the patient came up with purulent sinus tract; the tooth was still mobile and periapical radiography revealed the presence of the intracanal medicament in canal as well as the lesion (Figure 2).
case_images: PMC4372793_04
case_images: PMC4372793_05
case_images: follow-up radiographs: A) immediately after surgery and B) One year later
case_images: iej-10-148-g003.jpg
case_images: PMC4372793_06_iej-10-148-g003.jpg
case_images: F3
case_images: One year later the patient accidentally appeared in the clinic and follow-up radiography was taken (Figure 3).
case_images: PMC4372793_06
case_images: follow-up radiographs: A) immediately after surgery and B) One year later
case_images: iej-10-148-g003.jpg
case_images: PMC4372793_06_iej-10-148-g003.jpg
case_images: F3
case_images: One year later the patient accidentally appeared in the clinic and follow-up radiography was taken (Figure 3).