A Safety Limit of the Number of Artificial Canals That Can Be Prepared by Two Rotary Endodontic Files Operated at Two Different Speeds: A Novel Approach.

IF 3.7 3区医学 Q2 ENGINEERING, BIOMEDICAL

Bioengineering Pub Date : 2025-09-17 DOI:10.3390/bioengineering12090985

Omar Alzahrani, Khalid Merdad, Tariq Abuhaimed, Zuhair S Natto, Amna Y Siddiqui, Osama S Alothmani

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引用次数: 0

Abstract

Utilizing a novel approach that concomitantly assessed cyclic fatigue and torsional overloading, we aimed to establish the maximum number of artificial canals that can be prepared by Hyflex EDM and NeoNiTi A1 operated at two different speeds until their separation. Forty-eight files were equally divided into four groups: (A) Hyflex EDM operated at 300 rotations per minute (RPM) and (B) at 500 RPM, and (C) NeoNiTi A1 at 300 RPM and (D) at 500 RPM. Files were used to completely shape 10 sequential artificial canals unless file separation occurred. Maximum number of canals prepared was noted and averaged. Fractography was conducted to determine the mechanism of file separation. Hyflex EDM prepared significantly more canals compared to NeoNiTi A1 (p = 0.008). When operated at 300 RPM, Hyflex EDM prepared significantly more canals compared to NeoNiTi A1 (p = 0.028), whereas no significant difference was observed when they were operated at 500 RPM (p = 0.116). One NeoNiTi file broke due to cyclic fatigue while another one separated due to torsional overloading. Hyflex EDM files showed signs of both mechanisms. Within the limitations of this study, one file safely prepared four to five canals before its fracture. There was a trend towards fewer prepared canals as the RPM increased.

查看原文本刊更多论文

两个旋转根管锉以两种不同速度操作可制备人工根管数量的安全限制：一种新方法。

利用一种同时评估循环疲劳和扭转超载的新方法，我们的目标是确定Hyflex EDM和NeoNiTi A1在两种不同速度下运行直到分离的人工管道的最大数量。48个锉被平均分为四组：(A) Hyflex EDM每分钟300转（RPM）， (B) 500转（RPM）， (C) NeoNiTi A1 300转/分钟（RPM）， (D) 500转/分钟（RPM）。除非发生锉分离，否则用锉完全塑造10个连续的人工管。记录准备的最大运河数并取平均值。通过断口分析确定了文件分离的机理。与NeoNiTi A1相比，Hyflex EDM制备了更多的管道（p = 0.008）。与NeoNiTi A1相比，当转速为300 RPM时，Hyflex EDM制备了更多的管（p = 0.028），而当转速为500 RPM时，没有观察到显著差异（p = 0.116）。一个neoiti文件因循环疲劳而破裂，另一个文件因扭转过载而分离。Hyflex EDM文件显示了这两种机制的迹象。在本研究的限制下，一根锉在骨折前安全准备了四到五个管。随着RPM的增加，预备管数有减少的趋势。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bioengineering Chemical Engineering-Bioengineering

CiteScore

4.00

自引率

8.70%

发文量

661

期刊介绍： Aims Bioengineering (ISSN 2306-5354) provides an advanced forum for the science and technology of bioengineering. It publishes original research papers, comprehensive reviews, communications and case reports. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. All aspects of bioengineering are welcomed from theoretical concepts to education and applications. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. There are, in addition, four key features of this Journal: ● We are introducing a new concept in scientific and technical publications “The Translational Case Report in Bioengineering”. It is a descriptive explanatory analysis of a transformative or translational event. Understanding that the goal of bioengineering scholarship is to advance towards a transformative or clinical solution to an identified transformative/clinical need, the translational case report is used to explore causation in order to find underlying principles that may guide other similar transformative/translational undertakings. ● Manuscripts regarding research proposals and research ideas will be particularly welcomed. ● Electronic files and software regarding the full details of the calculation and experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. ● We also accept manuscripts communicating to a broader audience with regard to research projects financed with public funds. Scope ● Bionics and biological cybernetics: implantology; bio–abio interfaces ● Bioelectronics: wearable electronics; implantable electronics; “more than Moore” electronics; bioelectronics devices ● Bioprocess and biosystems engineering and applications: bioprocess design; biocatalysis; bioseparation and bioreactors; bioinformatics; bioenergy; etc. ● Biomolecular, cellular and tissue engineering and applications: tissue engineering; chromosome engineering; embryo engineering; cellular, molecular and synthetic biology; metabolic engineering; bio-nanotechnology; micro/nano technologies; genetic engineering; transgenic technology ● Biomedical engineering and applications: biomechatronics; biomedical electronics; biomechanics; biomaterials; biomimetics; biomedical diagnostics; biomedical therapy; biomedical devices; sensors and circuits; biomedical imaging and medical information systems; implants and regenerative medicine; neurotechnology; clinical engineering; rehabilitation engineering ● Biochemical engineering and applications: metabolic pathway engineering; modeling and simulation ● Translational bioengineering