Development of bending fatigue testing system for endodontic files

Name: Teeramate Kessaro

Organization : Chulalongkorn University. Faculty of Engineering

Email : teeramate.kessaro@gmail.com

Name: Sirawut Hiran-us

Organization : Chulalongkorn University. Faculty of Dentistry

Name: Pairod Singhatanadgid

Organization : Chulalongkorn University. Faculty of Engineering

Name: Sarita Morakul

Organization : Chulalongkorn University. Faculty of Engineering

keyword: Endodontic file

LCSH: Stress corrosion

; Bending fatigue

LCSH: Fatigue testing machines

; NCF monitoring

Abstract: Root canal treatment in dental applications poses a risk of fatigue failure for endodontic files because these files are continuously subjected to cyclic bending loads within curved root canals. In order to prevent a risk of failure during operations, dentists must understand and be able to evaluate the number of cycles to failure (NCF) of each file’s condition. Therefore, this paper aims to design and develop a novel bending fatigue testing system for endodontic files by which the NCF of the files can be evaluated and monitored. In the testing system, modifications were made to the motor control unit to extract both the calibrated encoder signals and current signals. These signals were utilized to track the motor's completed cycles and monitor file breakage time, respectively, allowing for the accurate determination of the NCF for the tested files. To validate the proposed bending fatigue testing system, twenty endodontic files were carried out and rotated in an artificial root canal until they fractured, and the NCF of each file was then assessed. The files were categorized into four subgroups, each undergoing rotation in an artificial root canal with a 5 mm radius of curvature. The subgroups included angles of curvature of 30°, 45°, and 60° at body temperature, as well as an angle of 45° at room temperature. All tests were conducted in temperature-controlled distilled water in a container. The findings of this study demonstrated concordance with those of earlier research, specifically revealing a decrement in the NCF of the files as the angle of curvature of the artificial root canal increased and as the ambient temperature rose. Moreover, all files that underwent testing within this system exhibited visible indications of bending fatigue fractures. By virtue of these results, the efficacy of the proposed testing system in conducting bending fatigue tests for endodontic files is substantiated.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2024

Modified: 2024-12-16

Issued: 2024-12-16

บทความ/Article

application/pdf

BibliograpyCitation : In Thai Society of Mechanical Engineers (TSME) and Chiang Mai University. The 13th TSME International Conference on Mechanical Engineering (TSME-ICoME 2023) (pp.345-353). Chiang Mai : Chiang Mai University, 2023

eng

©copyrights King Mongkut's University of Technology North Bangkok

ลำดับที่.	ชื่อแฟ้มข้อมูล	ขนาดแฟ้มข้อมูล	จำนวนเข้าถึง	วัน-เวลาเข้าถึงล่าสุด
1	TSME-ICoME13 2023pp.345-353.pdf	940.61 KB

ใช้เวลา

0.033994 วินาที