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Possibility of Bypassing Three Fractured Rotary NiTi Files and Its Correlation with the Degree of Root Canal Curvature and Location of the Fractured File: An In Vitro Study

INTRODUCTION: This study aimed to evaluate the success rate of bypassing three NiTi rotary files (RaCe(®), Hero 642(®), and K3(®)), fractured in various root canal locations of extracted mandibular molars with two different canal curvatures. MATERIALS AND METHODS: Ninety freshly extracted human firs...

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Autores principales: Arshadifar, Esmaeil, Shahabinejad, Hasan, Fereidooni, Rahim, Shahravan, Arash, Kamyabi, Homa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Iranian Center for Endodontic Research 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9868980/
https://www.ncbi.nlm.nih.gov/pubmed/36704020
http://dx.doi.org/10.22037/iej.v17i2.33922
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author Arshadifar, Esmaeil
Shahabinejad, Hasan
Fereidooni, Rahim
Shahravan, Arash
Kamyabi, Homa
author_facet Arshadifar, Esmaeil
Shahabinejad, Hasan
Fereidooni, Rahim
Shahravan, Arash
Kamyabi, Homa
author_sort Arshadifar, Esmaeil
collection PubMed
description INTRODUCTION: This study aimed to evaluate the success rate of bypassing three NiTi rotary files (RaCe(®), Hero 642(®), and K3(®)), fractured in various root canal locations of extracted mandibular molars with two different canal curvatures. MATERIALS AND METHODS: Ninety freshly extracted human first or second mandibular molars were selected. Three millimeters of the file tip (RaCe(®), Hero 642(®), and K3(®)), was fractured intentionally in the mesiobuccal root canal of each tooth by weakening the file in the last 3 mm of files #30 with 4% taper and preparing the root canals with two different degrees of curvature (n=30). Then, bypass possibility of the fractured files was evaluated using #8, #10, and #15 K-files and compared in different groups. In addition, the rate of accidental procedural errors was compared between these groups. Data were analyzed with univariate analysis and logistic regression models at a significance level of 0.05. RESULTS: The overall success rate of bypassing was 61.1%. RaCe(®) files had the highest and the K3(®) files had the lowest bypass possibility rates (P=0.01); the greater the degree of canal curvature, the less successful the bypass procedure (P=0.01). The fracture of the files used to bypass was the most prevalent error. CONCLUSION: Based on this in vitro study the type of fractured file and the amount of canal curvature affected the success rate of the bypassing technique. In RaCe(®) files and the mild curvature group, the success rate was the highest.
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spelling pubmed-98689802023-01-25 Possibility of Bypassing Three Fractured Rotary NiTi Files and Its Correlation with the Degree of Root Canal Curvature and Location of the Fractured File: An In Vitro Study Arshadifar, Esmaeil Shahabinejad, Hasan Fereidooni, Rahim Shahravan, Arash Kamyabi, Homa Iran Endod J Original Article INTRODUCTION: This study aimed to evaluate the success rate of bypassing three NiTi rotary files (RaCe(®), Hero 642(®), and K3(®)), fractured in various root canal locations of extracted mandibular molars with two different canal curvatures. MATERIALS AND METHODS: Ninety freshly extracted human first or second mandibular molars were selected. Three millimeters of the file tip (RaCe(®), Hero 642(®), and K3(®)), was fractured intentionally in the mesiobuccal root canal of each tooth by weakening the file in the last 3 mm of files #30 with 4% taper and preparing the root canals with two different degrees of curvature (n=30). Then, bypass possibility of the fractured files was evaluated using #8, #10, and #15 K-files and compared in different groups. In addition, the rate of accidental procedural errors was compared between these groups. Data were analyzed with univariate analysis and logistic regression models at a significance level of 0.05. RESULTS: The overall success rate of bypassing was 61.1%. RaCe(®) files had the highest and the K3(®) files had the lowest bypass possibility rates (P=0.01); the greater the degree of canal curvature, the less successful the bypass procedure (P=0.01). The fracture of the files used to bypass was the most prevalent error. CONCLUSION: Based on this in vitro study the type of fractured file and the amount of canal curvature affected the success rate of the bypassing technique. In RaCe(®) files and the mild curvature group, the success rate was the highest. Iranian Center for Endodontic Research 2022 /pmc/articles/PMC9868980/ /pubmed/36704020 http://dx.doi.org/10.22037/iej.v17i2.33922 Text en https://creativecommons.org/licenses/by-nc-sa/4.0/This open-access article has been distributed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0).https://creativecommons.org/licenses/by-nc-sa/4.0/
spellingShingle Original Article
Arshadifar, Esmaeil
Shahabinejad, Hasan
Fereidooni, Rahim
Shahravan, Arash
Kamyabi, Homa
Possibility of Bypassing Three Fractured Rotary NiTi Files and Its Correlation with the Degree of Root Canal Curvature and Location of the Fractured File: An In Vitro Study
title Possibility of Bypassing Three Fractured Rotary NiTi Files and Its Correlation with the Degree of Root Canal Curvature and Location of the Fractured File: An In Vitro Study
title_full Possibility of Bypassing Three Fractured Rotary NiTi Files and Its Correlation with the Degree of Root Canal Curvature and Location of the Fractured File: An In Vitro Study
title_fullStr Possibility of Bypassing Three Fractured Rotary NiTi Files and Its Correlation with the Degree of Root Canal Curvature and Location of the Fractured File: An In Vitro Study
title_full_unstemmed Possibility of Bypassing Three Fractured Rotary NiTi Files and Its Correlation with the Degree of Root Canal Curvature and Location of the Fractured File: An In Vitro Study
title_short Possibility of Bypassing Three Fractured Rotary NiTi Files and Its Correlation with the Degree of Root Canal Curvature and Location of the Fractured File: An In Vitro Study
title_sort possibility of bypassing three fractured rotary niti files and its correlation with the degree of root canal curvature and location of the fractured file: an in vitro study
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9868980/
https://www.ncbi.nlm.nih.gov/pubmed/36704020
http://dx.doi.org/10.22037/iej.v17i2.33922
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