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. 2022 Jun 16;10(17):5816–5824. doi: 10.12998/wjcc.v10.i17.5816

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©The Author(s) 2022. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: https://creativecommons.org/Licenses/by-nc/4.0/

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Preoperative images. A: Sinus on the labial gingival mucosa near the apical region of tooth #9; B: Deep narrow isolated pocket on the palatal aspect of tooth #9; C: A cone beam computed tomography (CBCT) cross-sectional image showing a fracture line (arrowhead) on the palatal aspect of tooth #9; D: A CBCT coronal-section image showing a fracture line (arrowhead) from the cervical region to the apex; E: A CBCT sagittal-section image showing a large region of bone destruction (arrowhead) in the palatal and apical areas of the root.