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. 2024 Dec 11;5:1498167. doi: 10.3389/fdmed.2024.1498167

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© 2024 Hu, Feng, Li, Li and Li.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The root canal filling of tooth #34 under a dental operating microscope. (a) The canals were trial-fitted; (b) The filling of the root canals in the lower segment of the root bifurcation; (c) The upper segment was backfilled with gutta-percha; (d) The final coronal filling as presented in the inverted x-ray image; (e–g) The postoperative CBCT results showed that the root canals were filled densely and continuously without gaps on the coronal plane (e), axial plane (f), and sagittal plane (g) Follow-up visit 1 year after RCT. (h) The full crown restoration of tooth #34; (i–k) CBCT results showed that the four root canals were densely and evenly filled, with no apparent abnormalities observed in the periapical region on the coronal plane (i), axial plane (j), and sagittal plane (k).