PMC9337978_01
Preoperative radiographic assessment showing tooth #23 with permanent core retained with a fiber post and inadequate root canal filling.
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Radiographic interpretation revealed a permanent core retained with a fiber post of unknown sources with an inadequate root canal filling and periapical radiolucency (Figure 1).
Preoperative CBCT assessment. Sagittal slice of tooth #23 confirms apical root resorption with the radiolucent area, 2.15 mm short obturation, and fiber post cemented up to the middle third.
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The obturation was found to be 2.15 mm short from the apex and the fiber post was located up to the middle third (Figure 2).
Virtual planning of fiber post removal. The drill was positioned along the long axis of the fiber post set up to its apical tip.
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The space was virtually overlapped over the fiber post to drill through it with minimal dentin loss (Figure 3).
(a) Under rubber dam isolation, the guide was positioned on the teeth to check the correct fitting. (b, c) Intracanal space following complete removal of the fiber post with coronal gutta-percha exposure.
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The endo-guide template was fitted inside the patient's mouth (Figure 4(a)). The procedure took 14 min and 55 s to expose the coronal gutta-percha inside the canal (Figure 4(b) and 4(c)).
(a) Working length determination radiograph. (b) Master gutta-percha cone radiograph. (c) Final radiograph.
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Tokyo, Japan) and confirm it radiographically (Figure 5(a)). Paul, MN, USA) and resin-modified glass ionomer material (Photac Fil; ESPE, Norristown, PA, USA) filling materials and referred for final restoration (Figure 5(b) and 5(c)).