case_images: PMC7006591_01
case_images: A preoperative PA radiograph showing a periradicular radiolucency associated to tooth #17 with previously treated canals
case_images: EEJ-4-145-g001.jpg
case_images: PMC7006591_01_EEJ-4-145-g001.jpg
case_images: F1
case_images: Periapical (PA) radiograph (Fig. 1) showed previous root canal treatment with adequate length control on all three roots.
case_images: After IR, a PA radiograph was taken to confirm the tooth replanted into the original position and with good white MTA retrograde filling
case_images: EEJ-4-145-g002.jpg
case_images: PMC7006591_01_EEJ-4-145-g002.jpg
case_images: F2
case_images: PA radiograph (Fig. 2) was obtained showing the tooth was replanted to the original position and with acceptable retrograde filling. Postoperative instruction was given to the patient.
case_images: The patient presented with clinical signs and symptoms of chronic periradicular abscess at 10 months of follow-up. The radiograph showing a gutta percha traced the sinus tract on the buccal gingiva to the PA region of the disto-buccal root
case_images: EEJ-4-145-g003.jpg
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case_images: F3
case_images: The sinus tract was traced with gutta percha prior to obtaining a PA radiograph (Fig. 3), and the gutta percha was traced with the sinus tract to the disto-buccal root.
case_images: Axial view of CBCT images showing no sign of external root resorption and ankyloses. (a) Coronal third, (b) middle third, (c) apical third
case_images: EEJ-4-145-g004.jpg
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case_images: F4
case_images: There was no sign of external root resorption and ankylosis detected, and this has been confirmed after the cone beam computed tomography (CBCT) (Fig. 4) was obtained.
case_images: Radiograph taken after the removal of the root filling material. The MTA retrograde filling was left in situ
case_images: EEJ-4-145-g005.jpg
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case_images: F5
case_images: Full instrumentation was done with Race file (FKG Dentaire, La Chaux-de-Fonds, Switzerland) until #40/04 on MB1, MB2, and DB canals and #60/04 on P canal, with leaving the MTA retrograde filling in situ (Fig. 5).
case_images: Radiograph taken immediately after non-surgical retreatment. A partial resolution of the PA radiolucency was observed
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case_images: F6
case_images: A final PA radiograph (Fig. 6) was obtained to confirmed good or adequate obturation.
case_images: Radiograph taken at 1 year of follow-up showing no periradicular radiolucency on tooth #17. However, a periradicular radiolucency was detected on the mesio-buccal root of tooth #16
case_images: EEJ-4-145-g007.jpg
case_images: PMC7006591_01_EEJ-4-145-g007.jpg
case_images: F7
case_images: PA radiograph (Fig. 7) was taken, and it showed complete resolution of the PA radiolucency, with bone filling in the previous radiolucent region.