A Comparative Study of Factors Affecting Cyclic Fatigue Resistance Between Tapering and Metallurgic Improvement of NiTi Rotary Files

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PDF A comparative study
Published: Dec 1, 2017
Keywords:
Cyclic fatigue resistance Taper Metallurgic improvement NiTi rotary file K3 K3XF

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Panupong Jiradechochai
Department of Restorative Dentistry, Faculty of Dentistry, Khon Kaen University, Amphur Muang, Khon Kaen
Chantida Pawaputanon Na Mahasarakham
Department of Restorative Dentistry, Faculty of Dentistry, Khon Kaen University, Amphur Muang, Khon Kaen
Kunwara Thariya
Department of Restorative Dentistry, Faculty of Dentistry, Khon Kaen University, Amphur Muang, Khon Kaen
Kamonporn Wangkuenklang
Dental Department, Nondang Hospital, Amphur Nondang, Nakhon Ratchasima.
Pichayanan Chantarayotha
Dental Department,Khao Suankwang Hospital, Amphur Khao Suankwang, Khon Kaen.
Soranan Jaroonsakchai
Dental Department, Nondang Hospital, Amphur Nondang, Nakhon Ratchasima.

Abstract

The purpose of this study was to evaluate factors affecting cycling fatigue resistance by comparing between different tapers and metallurgic improvement of NiTi rotary files. Total numbers of 90 files; no.25, 30, 35 of K3 files (0.02, 0.04 fixed taper), and no.25, 30, 35 of K3XF files (0.04 fixed taper), were divided into 9 groups of 10 files each. Samples were rotated in an artificial canal until fractured, and the number of cycles to failure were subsequently recorded. The surfaces of fractured instruments were analyzed by using scanning electron microscope at 200 magnification to determine the surface characteristics. The results showed that, among files with the same size, tapering of the files had more effects on the numbers of cycle to failure than metallurgic improvement did. SEM analysis revealed that the fractured surfaces of all instruments was due to cyclic fatigue. In conclusion, tapering of the files has more effects on cyclic fatigue resistance than metallurgic improvement by R-phase heat treatment of NiTi rotary files with identical geometric characteristics.

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How to Cite
1.
Jiradechochai P, Pawaputanon Na Mahasarakham C, Thariya K, Wangkuenklang K, Chantarayotha P, Jaroonsakchai S. A Comparative Study of Factors Affecting Cyclic Fatigue Resistance Between Tapering and Metallurgic Improvement of NiTi Rotary Files. Khon Kaen Dent J [Internet]. 2017 Dec. 1 [cited 2024 Apr. 18];20(2):63-72. Available from: https://he01.tci-thaijo.org/index.php/KDJ/article/view/126348
Issue
Vol. 20 No. 2 (2017)
Section
Research Articles

บทความ ข้อมูล เนื้อหา รูปภาพ ฯลฯ ที่ได้รับการลงตีพิมพ์ในวิทยาสารทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่นถือเป็นลิขสิทธิ์เฉพาะของคณะทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่น หากบุคคลหรือหน่วยงานใดต้องการนำทั้งหมดหรือส่วนหนึ่งส่วนใดไปเผยแพร่ต่อหรือเพื่อกระทำการใด ๆ จะต้องได้รับอนุญาตเป็นลายลักษณ์อักษร จากคณะทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่นก่อนเท่านั้น

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