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Micro-computed tomographic evaluation of endodontic ledge position in relation to canal curvatures

BACKGROUND: Endodontic ledge (EL) formation is the most common complication of endodontic treatment. Although various etiological factors have been identified, canal curvature is the most significant variable correlated with EL formation. The aim of this micro-computed tomographic (micro-CT) study w...

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Autores principales: Berutti, Elio, Alovisi, Mario, Moccia, Edoardo, Carossa, Massimo, De Caro, Giovanni, Roccuzzo, Andrea, Pasqualini, Damiano, Scotti, Nicola
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2022
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Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9650826/
https://www.ncbi.nlm.nih.gov/pubmed/36357901
http://dx.doi.org/10.1186/s12903-022-02531-5
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author Berutti, Elio
Alovisi, Mario
Moccia, Edoardo
Carossa, Massimo
De Caro, Giovanni
Roccuzzo, Andrea
Pasqualini, Damiano
Scotti, Nicola
author_facet Berutti, Elio
Alovisi, Mario
Moccia, Edoardo
Carossa, Massimo
De Caro, Giovanni
Roccuzzo, Andrea
Pasqualini, Damiano
Scotti, Nicola
author_sort Berutti, Elio
collection PubMed
description BACKGROUND: Endodontic ledge (EL) formation is the most common complication of endodontic treatment. Although various etiological factors have been identified, canal curvature is the most significant variable correlated with EL formation. The aim of this micro-computed tomographic (micro-CT) study was to evaluate EL position in the mesial canals of the lower molars in relation to the degree of canal curvature. METHODS: Forty intact mandibular first molars with independent mesial canals with 20°–40° primary mesio-distal curvature, 10°–30° buccal-lingual canal curvature and 4 < r ≤ 8 mm main curvature radius were selected. Working length was measured with a K-File #10 and a high resolution pre-operative micro-CT analysis was performed. Ledges were created at the point of maximum canal curvature using stainless steel K-Files #30–35, alternating irrigation with 5% NaOCl and 10% EDTA. A post-operative high-resolution micro-CT analysis was then completed. Pre- and post-operative images were analyzed. The angle (α) formed between the vector passing through the geometric center of the EL and the center of the original canal lumen and the line joining the centers of the mesio-buccal and mesio-lingual canal orifices was calculated, and a descriptive statistical analysis was achieved. The α angle values were analyzed in relation to canal curvature using Kruskal-Wallis and post hoc Dunn’s tests. The level of significance was set at P < 0.05. RESULTS: The α angles appeared inversely proportional to canal curvatures in the buccal-lingual and mesio-distal projections. The mean α angle was 36.4° (standard deviation 10.64; 95% confidence interval 34.1–40.9). CONCLUSION: Within the limitations of this study, endodontic ledges develop in the opposite direction to the three-dimensional canal curvature and their position is influenced by the degree of curvature. Clinically, the α angle values may be related to the recommended direction to manage endodontic ledges.
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spelling pubmed-96508262022-11-15 Micro-computed tomographic evaluation of endodontic ledge position in relation to canal curvatures Berutti, Elio Alovisi, Mario Moccia, Edoardo Carossa, Massimo De Caro, Giovanni Roccuzzo, Andrea Pasqualini, Damiano Scotti, Nicola BMC Oral Health Research Article BACKGROUND: Endodontic ledge (EL) formation is the most common complication of endodontic treatment. Although various etiological factors have been identified, canal curvature is the most significant variable correlated with EL formation. The aim of this micro-computed tomographic (micro-CT) study was to evaluate EL position in the mesial canals of the lower molars in relation to the degree of canal curvature. METHODS: Forty intact mandibular first molars with independent mesial canals with 20°–40° primary mesio-distal curvature, 10°–30° buccal-lingual canal curvature and 4 < r ≤ 8 mm main curvature radius were selected. Working length was measured with a K-File #10 and a high resolution pre-operative micro-CT analysis was performed. Ledges were created at the point of maximum canal curvature using stainless steel K-Files #30–35, alternating irrigation with 5% NaOCl and 10% EDTA. A post-operative high-resolution micro-CT analysis was then completed. Pre- and post-operative images were analyzed. The angle (α) formed between the vector passing through the geometric center of the EL and the center of the original canal lumen and the line joining the centers of the mesio-buccal and mesio-lingual canal orifices was calculated, and a descriptive statistical analysis was achieved. The α angle values were analyzed in relation to canal curvature using Kruskal-Wallis and post hoc Dunn’s tests. The level of significance was set at P < 0.05. RESULTS: The α angles appeared inversely proportional to canal curvatures in the buccal-lingual and mesio-distal projections. The mean α angle was 36.4° (standard deviation 10.64; 95% confidence interval 34.1–40.9). CONCLUSION: Within the limitations of this study, endodontic ledges develop in the opposite direction to the three-dimensional canal curvature and their position is influenced by the degree of curvature. Clinically, the α angle values may be related to the recommended direction to manage endodontic ledges. BioMed Central 2022-11-10 /pmc/articles/PMC9650826/ /pubmed/36357901 http://dx.doi.org/10.1186/s12903-022-02531-5 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research Article
Berutti, Elio
Alovisi, Mario
Moccia, Edoardo
Carossa, Massimo
De Caro, Giovanni
Roccuzzo, Andrea
Pasqualini, Damiano
Scotti, Nicola
Micro-computed tomographic evaluation of endodontic ledge position in relation to canal curvatures
title Micro-computed tomographic evaluation of endodontic ledge position in relation to canal curvatures
title_full Micro-computed tomographic evaluation of endodontic ledge position in relation to canal curvatures
title_fullStr Micro-computed tomographic evaluation of endodontic ledge position in relation to canal curvatures
title_full_unstemmed Micro-computed tomographic evaluation of endodontic ledge position in relation to canal curvatures
title_short Micro-computed tomographic evaluation of endodontic ledge position in relation to canal curvatures
title_sort micro-computed tomographic evaluation of endodontic ledge position in relation to canal curvatures
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9650826/
https://www.ncbi.nlm.nih.gov/pubmed/36357901
http://dx.doi.org/10.1186/s12903-022-02531-5
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