title: Effect of heat treatment conditions on the mechanical properties of Ti-6Mo-4Sn alloy for orthodontic wires.
abstract: β-titanium alloy is frequently used in nickel-free orthodontic wires for patients with a metal allergy. However, the Young's modulus of β-titanium alloy wires is lower than that of Co-Cr-Ni alloys, causing loss of anchorage and failure to prevent unwanted tooth movements. To improve its mechanical properties for use in anchorage appliances such as transpalatal arches, Ti-6Mo-4Sn alloy wire was heat-treated at 300, 400, 500 and 600 °C for 5 min, 30 min, and 4 h in this study. Tensile testing revealed that the wire heated at 500 °C/30 min had a Young's modulus of 75 GPa and a tensile strength of 1,650 MPa - the highest among all the heat treatment groups. Therefore, Ti-6Mo-4Sn alloy wire heat-treated at 500 °C/30 min yielded mechanical properties approximating those of wires currently used for retainers and transpalatal arches.
authors.affiliation: Department of Orthodontics, School of Dentistry, Aichi-Gakuin University, 2-11 Suemori-dori, Chikusa-ku, Nagoya-shi, Aichi-ken 464-8651, Japan. mayu-h@dpc.agu.ac.jp
authors.forename: Mayu
authors.initials: M
authors.lastname: Hida
authors.forename: Ken
authors.initials: K
authors.lastname: Miyazawa
authors.forename: Shozo
authors.initials: S
authors.lastname: Tsuruta
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kurosawa
authors.forename: Yuki
authors.initials: Y
authors.lastname: Hata
authors.forename: Tatsushi
authors.initials: T
authors.lastname: Kawai
authors.forename: Shigemi
authors.initials: S
authors.lastname: Goto
mesh_terms: D002858:Chromium Alloys; D003722:Dental Alloys; D003799:Dental Stress Analysis; D055119:Elastic Modulus; D006358:Hot Temperature / Q000627:therapeutic use; D008422:Materials Testing; D055595:Mechanical Phenomena; D008982:Molybdenum; D052280:Orthodontic Anchorage Procedures / Q000295:instrumentation*; D009969:Orthodontic Wires; D044367:Phase Transition; D013193:Stainless Steel; D013499:Surface Properties; D013718:Tensile Strength; D014001:Tin; D014025:Titanium; D014961:X-Ray Diffraction
chemical_list: D002858:Chromium Alloys; D003722:Dental Alloys; C023988:beta titanium; D013193:Stainless Steel; D014001:Tin; D008982:Molybdenum; D014025:Titanium