Fracture of nickel-titanium superelastic alloy in sodium hypochlorite solution

Ken'ichi Yokoyama, Kazuyuki Kaneko, Eiji Yabuta, Kenzo Asaoka, Jun'ichi Sakai

    Research output: Contribution to journalArticle

    22 Citations (Scopus)

    Abstract

    Fracture of the Ni-Ti superelastic alloy for endodontic instruments such as files was investigated with a sustained tensile-loading test in sodium hypochlorite (NaOCl) solution of various concentrations. It was found that the time to fracture was reduced when the applied stress exceeded the critical stress for martensite transformation. When the applied stress was higher than the critical stress, the 0.3 mm diameter wires of the Ni-Ti superelastic alloy sometimes fractured within 60 min. From the results of observations of the fracture surface using a scanning electron microscope, it was revealed that the fracture of the Ni-Ti superelastic alloy is significantly influenced by corrosion when the applied stress was higher than the critical stress for martensite transformation. The results of the present study suggest that one of the causes of the fracture of Ni-Ti files during clinical use is corrosion under the applied stress above the critical stress for martensite transformation in NaOCl solution.

    Original languageEnglish
    Pages (from-to)43-48
    Number of pages6
    JournalMaterials Science and Engineering A
    Volume369
    Issue number1-2
    DOIs
    Publication statusPublished - 2004 Mar 25

    Fingerprint

    Sodium Hypochlorite
    nickel alloys
    Nickel alloys
    titanium alloys
    Titanium alloys
    critical loading
    Sodium
    sodium
    martensite
    files
    Martensite
    corrosion
    Corrosion
    electron microscopes
    nitinol
    wire
    scanning
    causes
    Electron microscopes
    Wire

    Keywords

    • Corrosion
    • Fracture
    • Ni-Ti
    • Sodium hypochlorite
    • Superelastic alloy

    ASJC Scopus subject areas

    • Materials Science(all)

    Cite this

    Fracture of nickel-titanium superelastic alloy in sodium hypochlorite solution. / Yokoyama, Ken'ichi; Kaneko, Kazuyuki; Yabuta, Eiji; Asaoka, Kenzo; Sakai, Jun'ichi.

    In: Materials Science and Engineering A, Vol. 369, No. 1-2, 25.03.2004, p. 43-48.

    Research output: Contribution to journalArticle

    Yokoyama, Ken'ichi ; Kaneko, Kazuyuki ; Yabuta, Eiji ; Asaoka, Kenzo ; Sakai, Jun'ichi. / Fracture of nickel-titanium superelastic alloy in sodium hypochlorite solution. In: Materials Science and Engineering A. 2004 ; Vol. 369, No. 1-2. pp. 43-48.
    @article{8823fb0071874143a37fdeeb687657ad,
    title = "Fracture of nickel-titanium superelastic alloy in sodium hypochlorite solution",
    abstract = "Fracture of the Ni-Ti superelastic alloy for endodontic instruments such as files was investigated with a sustained tensile-loading test in sodium hypochlorite (NaOCl) solution of various concentrations. It was found that the time to fracture was reduced when the applied stress exceeded the critical stress for martensite transformation. When the applied stress was higher than the critical stress, the 0.3 mm diameter wires of the Ni-Ti superelastic alloy sometimes fractured within 60 min. From the results of observations of the fracture surface using a scanning electron microscope, it was revealed that the fracture of the Ni-Ti superelastic alloy is significantly influenced by corrosion when the applied stress was higher than the critical stress for martensite transformation. The results of the present study suggest that one of the causes of the fracture of Ni-Ti files during clinical use is corrosion under the applied stress above the critical stress for martensite transformation in NaOCl solution.",
    keywords = "Corrosion, Fracture, Ni-Ti, Sodium hypochlorite, Superelastic alloy",
    author = "Ken'ichi Yokoyama and Kazuyuki Kaneko and Eiji Yabuta and Kenzo Asaoka and Jun'ichi Sakai",
    year = "2004",
    month = "3",
    day = "25",
    doi = "10.1016/j.msea.2003.10.320",
    language = "English",
    volume = "369",
    pages = "43--48",
    journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",
    issn = "0921-5093",
    publisher = "Elsevier BV",
    number = "1-2",

    }

    TY - JOUR

    T1 - Fracture of nickel-titanium superelastic alloy in sodium hypochlorite solution

    AU - Yokoyama, Ken'ichi

    AU - Kaneko, Kazuyuki

    AU - Yabuta, Eiji

    AU - Asaoka, Kenzo

    AU - Sakai, Jun'ichi

    PY - 2004/3/25

    Y1 - 2004/3/25

    N2 - Fracture of the Ni-Ti superelastic alloy for endodontic instruments such as files was investigated with a sustained tensile-loading test in sodium hypochlorite (NaOCl) solution of various concentrations. It was found that the time to fracture was reduced when the applied stress exceeded the critical stress for martensite transformation. When the applied stress was higher than the critical stress, the 0.3 mm diameter wires of the Ni-Ti superelastic alloy sometimes fractured within 60 min. From the results of observations of the fracture surface using a scanning electron microscope, it was revealed that the fracture of the Ni-Ti superelastic alloy is significantly influenced by corrosion when the applied stress was higher than the critical stress for martensite transformation. The results of the present study suggest that one of the causes of the fracture of Ni-Ti files during clinical use is corrosion under the applied stress above the critical stress for martensite transformation in NaOCl solution.

    AB - Fracture of the Ni-Ti superelastic alloy for endodontic instruments such as files was investigated with a sustained tensile-loading test in sodium hypochlorite (NaOCl) solution of various concentrations. It was found that the time to fracture was reduced when the applied stress exceeded the critical stress for martensite transformation. When the applied stress was higher than the critical stress, the 0.3 mm diameter wires of the Ni-Ti superelastic alloy sometimes fractured within 60 min. From the results of observations of the fracture surface using a scanning electron microscope, it was revealed that the fracture of the Ni-Ti superelastic alloy is significantly influenced by corrosion when the applied stress was higher than the critical stress for martensite transformation. The results of the present study suggest that one of the causes of the fracture of Ni-Ti files during clinical use is corrosion under the applied stress above the critical stress for martensite transformation in NaOCl solution.

    KW - Corrosion

    KW - Fracture

    KW - Ni-Ti

    KW - Sodium hypochlorite

    KW - Superelastic alloy

    UR - http://www.scopus.com/inward/record.url?scp=1542609611&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=1542609611&partnerID=8YFLogxK

    U2 - 10.1016/j.msea.2003.10.320

    DO - 10.1016/j.msea.2003.10.320

    M3 - Article

    AN - SCOPUS:1542609611

    VL - 369

    SP - 43

    EP - 48

    JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

    JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

    SN - 0921-5093

    IS - 1-2

    ER -