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The effect of nickel titanium endodontic instruments on apical crack initiation and propagation

Research Project

Project/Area Number 24792017
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Conservative dentistry
Research InstitutionShowa University

Principal Investigator

YAHATA Yoshio  昭和大学, 歯学部, 助教 (30549944)

Project Period (FY) 2012-04-01 – 2014-03-31
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywordsニッケルチタンファイル / 根尖部亀裂 / 髄腔開拡 / 熱処理 / ナノインデンテーション / 機械的特性 / 回転曲げ疲労
Research Abstract

The purpose of this study was to evaluate the effects of nickel titanium endodontic file on the cracks of apical area. We conducted 1) measurement of micro-hardness by the nanoindentation technique, 2) improving of the alloy properties by heat treatment, 3) measurement of mechanical properties of the new nickel titanium endodontic instruments consist of newly alloy, and 4) measurement of the displacement in the root canal preparation at apical area, associated with the difference of the forms of access cavity preparation. The results of these investigations suggested that it will allow, by controlling the alloy characteristics of nickel titanium endodontic file or by improving the root canal preparation, to prevent the thinning of dentine, associated with uneven excessive excavation. It was suggested that securing the dentine thickness has a possibility to reduce the stress of the root canal and the incidence of micro cracks arising from this part.

Report

(3 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Research-status Report
  • Research Products

    (39 results)

All 2014 2013 2012 Other

All Journal Article (12 results) (of which Peer Reviewed: 5 results) Presentation (25 results) Book (2 results)

  • [Journal Article] 根管洗浄剤による歯科用充填材に及ぼす影響について-表面形態の観察と表面粗さの分析2014

    • Author(s)
      増田宜子, 山田嘉重, 木村裕一, 八幡祥生, 坂上斉, 鈴木重紀, 高林正行, 藤島昭宏, 宮崎隆
    • Journal Title

      日本歯内療法学会雑誌

      Volume: 35 Pages: 16-23

    • Related Report
      2013 Final Research Report
  • [Journal Article] The influence of heat treatment on the mechanical properties of Ni-Ti file materials2014

    • Author(s)
      Miyara K, Yahata Y, Hayashi Y, Tsutsumi Y, Ebihara A, Hanawa T, Suda H
    • Journal Title

      Dental Materials Journal

      Volume: 33 Pages: 27-31

    • NAID

      130003394948

    • Related Report
      2013 Annual Research Report 2013 Final Research Report
  • [Journal Article] Multidisciplinary management of a laterally laxuated maxillary central incisor: an evaluation using cone-beam computed tomography2014

    • Author(s)
      Yahata Y, Yahata K, Sakaue S, Ebihara A, Masuda Y, Suda H
    • Journal Title

      ENDO endodontic practice today

      Volume: in press

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Endodontic instruments after torsional failure: nanoindentation test2014

    • Author(s)
      Jamleh A, Sadr A, Nomura N, Ebihara A, Yahata Y, Hanawa T, Tagami J, Suda H
    • Journal Title

      Scanning

      Volume: in press Issue: 4 Pages: 437-443

    • DOI

      10.1002/sca.21139

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 根管洗浄剤による歯科用充填材に及ぼす影響について-表面形態の観察と表面粗さの分析‐2014

    • Author(s)
      増田宜子,山田嘉重,木村裕一,八幡祥生,坂上斉,鈴木重紀,高林正行,藤島昭宏,宮崎隆
    • Journal Title

      日本歯内療法学会雑誌

      Volume: 35 Pages: 16-23

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Deflecting load of nickel titanium rotary instruments during cyclic fatigue2012

    • Author(s)
      Jamleh A, Kobayashi C, Yahata Y, Ebihara A, Suda H
    • Journal Title

      Dental Materials Journal

      Volume: 31 Pages: 389-93

    • NAID

      10030315157

    • Related Report
      2013 Final Research Report 2012 Research-status Report
  • [Journal Article] Nano-indentation of NiTi Endodontic Instruments after Cyclic Fatigue2012

    • Author(s)
      Jamleh A, Sadr A, Nomura N, Yahata Y, Ebihara A, Hanawa T, Tagami J, Suda H
    • Journal Title

      Internationl endodontic Journal

      Volume: 45 Pages: 462-8

    • Related Report
      2013 Final Research Report
  • [Journal Article] 複雑な根管を呈する下顎小臼歯の歯内治療‐歯科用実体顕微鏡とコーンビームCT の有用性2012

    • Author(s)
      八幡祥生, 山内隆守, 海老原新, 須田英明
    • Journal Title

      日本歯内療法学会雑誌

      Volume: 33巻 Pages: 14-19

    • Related Report
      2013 Final Research Report
  • [Journal Article] Nano-indentation of NiTi Endodontic Instruments after Cyclic Fatigue2012

    • Author(s)
      Jamleh A, Sadr A, Nomura N, Yahata Y, Ebihara A, Hanawa T, Tagami J, Suda H
    • Journal Title

      International Endodontic Journal

      Volume: 45 Issue: 5 Pages: 462-8

    • DOI

      10.1111/j.1365-2591.2011.01997.x

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] 複雑な根管を呈する下顎小臼歯の歯内治療‐歯科用実体顕微鏡とコーンビームCTの有用性‐2012

    • Author(s)
      八幡祥生,山内隆守,海老原新,須田英明
    • Journal Title

      日本歯内療法学会雑誌

      Volume: 33 Pages: 14-9

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] Multidisciplinary management of a laterally laxuated maxillary central incisor : an evaluation using cone-beam computed tomography

    • Author(s)
      Yahata Y, Yahata K, Sakaue S, Ebihara A, Masuda Y, Suda H
    • Journal Title

      ENDO endodontic practice today

      Volume: (in press)

    • Related Report
      2013 Final Research Report
  • [Journal Article] Endodontic instruments after torsional failure : nanoindentation test

    • Author(s)
      Jamleh A, Sadr A, Nomura N, Ebihara A, Yahata Y, Hanawa T, Tagami J, Suda H
    • Journal Title

      Scanning

      Volume: (in press)

    • Related Report
      2013 Final Research Report
  • [Presentation] Phase transformation behavior and bending properties of newly designed shape-memorized nickel-titanium endodontic instruments2013

    • Author(s)
      Yahata Y, Miyara K, Sakaue H, Ebihara A, Suda H, Miyazaki T
    • Organizer
      IFEA The 9th World Endodontic Congress
    • Related Report
      2013 Final Research Report
  • [Presentation] The polymerization rate of sealers2013

    • Author(s)
      Sakaue H, Yahata Y, Masuda Y, Miyazaki T
    • Organizer
      IFEA The 9th World Endodontic Congress
    • Related Report
      2013 Annual Research Report 2013 Final Research Report
  • [Presentation] Mandibular incisors with a large periapical lesion diagnosed and followed up by CBCT2013

    • Author(s)
      Yamauchi T, Miyara K, Yahata Y, Ebihara A, Suda H
    • Organizer
      IFEA The 9th World Endodontic Congress
    • Related Report
      2013 Annual Research Report 2013 Final Research Report
  • [Presentation] 昭和大学歯科病院歯内治療科における臨床統計的検討2013

    • Author(s)
      細田秀剛, 鈴木重紀, 坂上斉, 八幡祥生, 増田宜子, 宮崎隆
    • Organizer
      第33回昭和歯学会例会
    • Related Report
      2013 Final Research Report
  • [Presentation] 歯内治療科における歯根端切除手術の治療成績2013

    • Author(s)
      八幡祥生, 高林正行, 坂上斉, 細田秀剛, 増田宜子, 宮崎隆
    • Organizer
      第33回昭和歯学会総会
    • Related Report
      2013 Final Research Report
  • [Presentation] 新型ニッケルチタンファイルVortex Blue の相変態挙動および曲げ特性について2013

    • Author(s)
      宮良香菜, 八幡祥生, 海老原新, 塙隆夫, 須田英明
    • Organizer
      第139回日本歯科保存学会 秋季学術大会
    • Related Report
      2013 Final Research Report
  • [Presentation] 髄腔開拡の形態が根尖部根管形成に与える影響2013

    • Author(s)
      八幡祥生, 古川恵理奈, 吉岡隆知, 坂上斉, 増田宜子, 宮崎隆
    • Organizer
      第139回日本歯科保存学会 秋季学術大会
    • Related Report
      2013 Final Research Report
  • [Presentation] レジン系シーラーの組成についての評価2013

    • Author(s)
      坂上斉, 八幡祥生, 増田宜子, 藤島昭宏, 宮崎隆
    • Organizer
      第139回日本歯科保存学会 秋季学術大会
    • Related Report
      2013 Final Research Report
  • [Presentation] 根尖部炎症性外部吸収が認められた移植歯に根管治療を行った1 例2013

    • Author(s)
      八幡祥生, 坂上斉
    • Organizer
      日本顕微鏡歯科学会第10回学術大会
    • Related Report
      2013 Final Research Report
  • [Presentation] Phase transformation behavior and bending properties of newly designed shape-memorized nickel-titanium endodontic instruments.2013

    • Author(s)
      Yahata Y, Miyara K, Sakaue H, Ebihara A, Suda H, Miyazaki T
    • Organizer
      IFEA The 9th World Endodontic Congress
    • Place of Presentation
      Tokyo
    • Related Report
      2013 Annual Research Report
  • [Presentation] 昭和大学歯科病院歯内治療科における臨床統計的検討2013

    • Author(s)
      細田秀剛、鈴木重紀、坂上斉、八幡祥生、増田宜子、宮﨑隆
    • Organizer
      第33回昭和歯学会例会
    • Place of Presentation
      東京
    • Related Report
      2013 Annual Research Report
  • [Presentation] 髄腔開拡の形態が根尖部根管形成に与える影響2013

    • Author(s)
      八幡祥生、古川恵理奈、吉岡隆知、坂上斉、増田宜子、宮崎隆
    • Organizer
      第139回日本歯科保存学会 秋季学術大会
    • Place of Presentation
      秋田
    • Related Report
      2013 Annual Research Report
  • [Presentation] レジン系シーラーの組成についての評価2013

    • Author(s)
      坂上斉、八幡祥生、増田宜子、藤島昭宏、宮崎隆
    • Organizer
      第139回日本歯科保存学会 秋季学術大会
    • Place of Presentation
      秋田
    • Related Report
      2013 Annual Research Report
  • [Presentation] 新型ニッケルチタンファイルVortex Blueの相変態挙動および曲げ特性について2013

    • Author(s)
      宮良香菜、八幡祥生、海老原新、塙隆夫、須田英明
    • Organizer
      第139回日本歯科保存学会 秋季学術大会
    • Place of Presentation
      秋田
    • Related Report
      2013 Annual Research Report
  • [Presentation] 歯内治療科における歯根端切除手術の治療成績2013

    • Author(s)
      八幡祥生、高林正行、坂上斉、細田秀剛、増田宜子、宮崎隆
    • Organizer
      第33回昭和歯学会総会
    • Place of Presentation
      東京
    • Related Report
      2013 Annual Research Report
  • [Presentation] Mechanical Properties of Nickel-Titanium Endodontic Instrument ProFile[〇!R] Vortex^<TM>2012

    • Author(s)
      Miyara K, Yahata Y, Hayashi Y, Ebihara A, Suda H
    • Organizer
      American Association of Endodontists 2012 annual session
    • Related Report
      2013 Final Research Report
  • [Presentation] Efficacy of Sonic and Ultrasonic Irrigations for Removal of Calcium Hydroxide Paste in the Root Canal : A Microtomographic Study2012

    • Author(s)
      Ishimura H, Hanada T, Komatsu K, Yoshioka T, Yahata Y, Yoshioka T, Suda H
    • Organizer
      American Association of Endodontists 2012 annual session
    • Related Report
      2013 Final Research Report
  • [Presentation] ニッケルチタンファイルProFile Vortex の湾曲根管模型における切削特性について2012

    • Author(s)
      宮良香菜, 八幡祥生, 海老原新, 須田英明
    • Organizer
      第137回日本歯科保存学会 秋季学術大会
    • Related Report
      2013 Final Research Report
  • [Presentation] ニッケルチタン合金線材の繰り返し疲労特性に及ぼす熱処理効果2012

    • Author(s)
      宮良香菜, 八幡祥生, 海老原新, 塙隆夫, 須田英明
    • Organizer
      第136回日本歯科保存学会 春季学術大会
    • Related Report
      2013 Final Research Report
  • [Presentation] Deflecting load change of nickel-titanium rotary instruments during cyclic fatigue2012

    • Author(s)
      Jamleh A, Kobayashi C, Yahata Y, Ebihara A, Suda H
    • Organizer
      第136回日本歯科保存学会 春季学術大会
    • Related Report
      2013 Final Research Report
  • [Presentation] Mechanical Properties of Nickel-Titanium Endodontic Instrument ProFile Vortex

    • Author(s)
      K. Miyara, Y. Yahata, Y. Hayashi, A. Ebihara, H. Suda
    • Organizer
      American Association of Endodontists 2012 annual session
    • Place of Presentation
      Boston, USA
    • Related Report
      2012 Research-status Report
  • [Presentation] Efficacy of Sonic and Ultrasonic Irrigations for Removal of Calcium Hydroxide Paste in the Root Canal : A Microtomographic Study

    • Author(s)
      H. Ishimura, T. Hanada, K. Komatsu, T. Yoshioka, Y. Yahata, T.Yoshioka, H. Suda
    • Organizer
      American Association of Endodontists 2012 annual session
    • Place of Presentation
      Boston, USA
    • Related Report
      2012 Research-status Report
  • [Presentation] ニッケルチタンファイルProFile Vortexの湾曲根管模型における切削特性について

    • Author(s)
      宮良香菜、八幡祥生、海老原新、須田英明
    • Organizer
      第137回日本歯科保存学会 秋季学術大会
    • Place of Presentation
      広島
    • Related Report
      2012 Research-status Report
  • [Presentation] ニッケルチタン合金線材の繰り返し疲労特性に及ぼす熱処理効果

    • Author(s)
      宮良香菜, 八幡祥生, 海老原新, 塙隆夫, 須田英明
    • Organizer
      第136回日本歯科保存学会 春季学術大会
    • Place of Presentation
      沖縄
    • Related Report
      2012 Research-status Report
  • [Presentation] Deflecting load change of nickel-titanium rotary instruments during cyclic fatigue

    • Author(s)
      Jamleh A, Kobayashi C, Yahata Y, Ebihara A, Suda H,
    • Organizer
      第136回日本歯科保存学会 春季学術大会
    • Place of Presentation
      沖縄
    • Related Report
      2012 Research-status Report
  • [Book] 歯内治療で大事なこと;日常臨床で必ず使える!歯内療法克服の一手, 別冊the Quintessence2013

    • Author(s)
      八幡祥生
    • Publisher
      クインテッセンス出版
    • Related Report
      2013 Final Research Report
  • [Book] 日常臨床で必ず使える!歯内療法克服の一手2013

    • Author(s)
      八幡祥生
    • Total Pages
      173
    • Publisher
      クインテッセンス出版
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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