High-cycle fatigue behavior of beta-titanium orthodontic wires

• MURAKAMI Takashi

  Analytical Applications Department, Kyoto Application Development Center, Shimadzu Corporation

• IIJIMA Masahiro

  Division of Orthodontics and Dentofacial Orthopedics, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido

• MUGURUMA Takeshi

  Division of Orthodontics and Dentofacial Orthopedics, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido

• YANO Fumiaki

  Analytical Applications Department, Kyoto Application Development Center, Shimadzu Corporation

• KAWASHIMA Isao

  Department of Biomaterilas, School of Dentistry, Ohu University

• MIZOGUCHI Itaru

  Division of Orthodontics and Dentofacial Orthopedics, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido

Abstract

This study investigated high-cycle fatigue behavior in three β-Ti wires (TMA, Resolve, Gummetal). Fatigue was evaluated using a static three-point bending test and a high-cycle fatigue test with a three-point bending mode. The surfaces of fractured wires were observed with scanning electron microscopy, and the post-fatigue crystal structures were determined by micro-X-ray diffraction. The Gummetal wire exhibited the lowest elastic modulus, bending strength and fatigue limit, and exhibited the highest resilience of the three types of wire studied. However, no difference in the number of cycles to failure was observed among the three types of wire. The fatigue crack propagation and rapid propagation regions of all wires contained single-phase β-Ti. The elastic modulus and bending strength influenced the fatigue limit, although these properties did not affect the number of cycles to fracture. The three types of β-Ti wires exhibited similar risks of wire fracture.

Journal

• Dental Materials Journal

  Dental Materials Journal 34 (2), 189-195, 2015

  The Japanese Society for Dental Materials and Devices

Keywords

• Orthodontic wire
• Beta-titanium
• Fatigue

Details

• CRID: 1390001204715382912
• NII Article ID: 130005062398
• DOI: 10.4012/dmj.2014-012
• ISSN: 18811361
• ISSN: 02874547
• PubMed: 25740165
• Web Site: https://www.jstage.jst.go.jp/article/dmj/34/2/34_2014-012/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2016110321
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • PubMed
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed