Cargando…

Influence of Optimum Torque Reverse Motion on Dentinal Cracks after Root Canal Preparation with Two Nickel-Titanium Rotary Systems

OBJECTIVES: This study was aimed to evaluate the cause-effect relationship between canal preparation with ProTaper Next (PTN) and ProTaper Gold (PTG) using optimum torque reverse (OTR) motion or continuous rotation and dentinal crack formation. MATERIALS AND METHODS: Fifty distobuccal roots of human...

Descripción completa

Detalles Bibliográficos
Autores principales: Khallaf, Maram, Hassan, Reham
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Wolters Kluwer - Medknow 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9285830/
https://www.ncbi.nlm.nih.gov/pubmed/35846585
http://dx.doi.org/10.4103/ccd.ccd_1061_20
_version_ 1784747872073285632
author Khallaf, Maram
Hassan, Reham
author_facet Khallaf, Maram
Hassan, Reham
author_sort Khallaf, Maram
collection PubMed
description OBJECTIVES: This study was aimed to evaluate the cause-effect relationship between canal preparation with ProTaper Next (PTN) and ProTaper Gold (PTG) using optimum torque reverse (OTR) motion or continuous rotation and dentinal crack formation. MATERIALS AND METHODS: Fifty distobuccal roots of human maxillary first molars were divided into five groups; Group I: PTG Full rotation, Group II: PTG in OTR, Group III: PTN Full rotation, Group IV: PTN in OTR, Group V: unprepared (control group). After mechanical preparation, the distobuccal roots were sectioned horizontally at 3, 6, and 9 mm from the apex. Images were captured using a stereomicroscope at 25X to determine the presence or absence of dentinal cracks. Friedman test was used to compare between root sections followed by Wilcoxon signed-rank test for pairwise comparison. Kruskal–Wallis test was used to compare between tested rotary systems followed by pairwise comparison with Dunn Bonferroni correction (α = 0.05). RESULTS: Crack development was significantly higher in PTG using OTR motion 36.7% followed by PTN using OTR 33.3%, while the control group showed no cracks. PTG and PTN with full rotation showed crack development with 23.3% and 13.3%, respectively. CONCLUSIONS: The type of motion kinematics used during mechanical preparation have an impact on dentinal crack formation. Nickel-titanium instruments with larger taper tend to induce more cracks.
format Online
Article
Text
id pubmed-9285830
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher Wolters Kluwer - Medknow
record_format MEDLINE/PubMed
spelling pubmed-92858302022-07-16 Influence of Optimum Torque Reverse Motion on Dentinal Cracks after Root Canal Preparation with Two Nickel-Titanium Rotary Systems Khallaf, Maram Hassan, Reham Contemp Clin Dent Original Article OBJECTIVES: This study was aimed to evaluate the cause-effect relationship between canal preparation with ProTaper Next (PTN) and ProTaper Gold (PTG) using optimum torque reverse (OTR) motion or continuous rotation and dentinal crack formation. MATERIALS AND METHODS: Fifty distobuccal roots of human maxillary first molars were divided into five groups; Group I: PTG Full rotation, Group II: PTG in OTR, Group III: PTN Full rotation, Group IV: PTN in OTR, Group V: unprepared (control group). After mechanical preparation, the distobuccal roots were sectioned horizontally at 3, 6, and 9 mm from the apex. Images were captured using a stereomicroscope at 25X to determine the presence or absence of dentinal cracks. Friedman test was used to compare between root sections followed by Wilcoxon signed-rank test for pairwise comparison. Kruskal–Wallis test was used to compare between tested rotary systems followed by pairwise comparison with Dunn Bonferroni correction (α = 0.05). RESULTS: Crack development was significantly higher in PTG using OTR motion 36.7% followed by PTN using OTR 33.3%, while the control group showed no cracks. PTG and PTN with full rotation showed crack development with 23.3% and 13.3%, respectively. CONCLUSIONS: The type of motion kinematics used during mechanical preparation have an impact on dentinal crack formation. Nickel-titanium instruments with larger taper tend to induce more cracks. Wolters Kluwer - Medknow 2022 2022-06-21 /pmc/articles/PMC9285830/ /pubmed/35846585 http://dx.doi.org/10.4103/ccd.ccd_1061_20 Text en Copyright: © 2022 Contemporary Clinical Dentistry https://creativecommons.org/licenses/by-nc-sa/4.0/This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.
spellingShingle Original Article
Khallaf, Maram
Hassan, Reham
Influence of Optimum Torque Reverse Motion on Dentinal Cracks after Root Canal Preparation with Two Nickel-Titanium Rotary Systems
title Influence of Optimum Torque Reverse Motion on Dentinal Cracks after Root Canal Preparation with Two Nickel-Titanium Rotary Systems
title_full Influence of Optimum Torque Reverse Motion on Dentinal Cracks after Root Canal Preparation with Two Nickel-Titanium Rotary Systems
title_fullStr Influence of Optimum Torque Reverse Motion on Dentinal Cracks after Root Canal Preparation with Two Nickel-Titanium Rotary Systems
title_full_unstemmed Influence of Optimum Torque Reverse Motion on Dentinal Cracks after Root Canal Preparation with Two Nickel-Titanium Rotary Systems
title_short Influence of Optimum Torque Reverse Motion on Dentinal Cracks after Root Canal Preparation with Two Nickel-Titanium Rotary Systems
title_sort influence of optimum torque reverse motion on dentinal cracks after root canal preparation with two nickel-titanium rotary systems
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9285830/
https://www.ncbi.nlm.nih.gov/pubmed/35846585
http://dx.doi.org/10.4103/ccd.ccd_1061_20
work_keys_str_mv AT khallafmaram influenceofoptimumtorquereversemotionondentinalcracksafterrootcanalpreparationwithtwonickeltitaniumrotarysystems
AT hassanreham influenceofoptimumtorquereversemotionondentinalcracksafterrootcanalpreparationwithtwonickeltitaniumrotarysystems