Aim: Our study aims to characterize the differential efficacy of
martensitic and austenitic files in root canal retreatment regarding defiling
ability, debris management and morphometric features. Materials and
methods: A total of 10 human premolar teeth with two separate fully formed roots
were selected, prepared with BioRace system (BR) up to a size BR2 (0.04/25). Root
canals were filled and then divided according to the file type into two groups (n
= 10). Two geometrically identical files have been used with the only difference
between them is heat treatment; One Curve (OC) martensitic and One Shape (OS)
austenitic. Preoperative and postoperative Micro-CT scans were done for all the
samples, and the percent volume of residual filling materials was calculated.
Canals reshaping and remaining debris in the canals were assessed by calculating
the volume of the canals before and after retreatment using Micro-CT software.
Results: The percentages of removed filling materials were similar
between both groups (97.2% OC vs 97.8% OS). OS was significantly faster than OC
(P
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Characterization of the differential efficacy of austenitic vs martensitic NiTi rotary files in non-surgical root canal retreatment: a micro-CT analysis
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1
Department of Endodontics, Faculty of Dentistry, King Abdulaziz University, 21589 Jeddah, Saudi Arabia
2
Ministry of Health, 21 Yehea Almoalmy, Alrabwah, 23222 Jeddah, Saudi Arabia
3
Department of Dental Public Health, Faculty of Dentistry, King Abdulaziz University, 21589 Jeddah, Saudi Arabia
4
Department of Restorative Dentistry, Faculty of Dentistry, King Abdulaziz University, 21589 Jeddah, Saudi Arabia
*Correspondence: lalsofi@kau.edu.sa (Loai Alsofi)
Front. Biosci. (Landmark Ed) 2021, 26(9), 465–474;
https://doi.org/10.52586/4959
Submitted: 23 May 2021 | Revised: 7 July 2021 | Accepted: 27 July 2021 | Published: 30 September 2021
(This article belongs to the Special Issue NiTi Rotary Instruments in Endodontics)
Copyright: © 2021 The Author(s). Published by BRI.
This is an open access article under the CC BY 4.0 license (https://creativecommons.org/licenses/by/4.0/).
Abstract
Keywords
Nickel-titanium
One Curve
One Shape
Rotary files
Retreatment
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Fig. 1.