Basic Study for Preventing Endodontic Instrument from fatigue breadking

防止牙髓器械疲劳面包屑的基础研究

• 批准号: 06671922
• 负责人: KUBOTA Minoru
• 金额: $ 1.09万
• 依托单位: Iwate Medical University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06671922/
• 关键词: Endodontic Instrument; Fandamentai study; Accidentally Breaking.; 突然の破壊; 疲労破壊.; 根管治療用器具.; ISO規格.

In endodontic treatment, it is a serious problem that accidentally breaking often results from metal fatigue of the endodontic instrument. The purpose of this study was to investigate the preventing endodontic instrument from accidentally braking.The fatigue breaking test machine was made and determined breaking torque, breaking angular deflection of three stainless steel reamers and a nickel-titanium file in conformity with the ISO standars (3630-1 : 1992). Fractographic observation was used the scanning electron microscope and the composition was analyzed with the electron probe X-ray microanalyzer.The results of the study are as follows :1. Fatigue breaking test machine worked fully for ISO standards. This machine had the aluminum chuck did not make the fracture and the transformation of endodontic instrument.2. The composition of nickel-titanium file was 49.7 atom.% nickel and 50.3atom.% titanium. The nickel-titanium file had lower hardness, bending torque and breaking torque than the stainless steel reamers.These results were reported to the dental society of iwate medical university in 1994 and the japan endodontic association, the international asscoiation for dental research and the japanese society of conservative dentistry in 1995.We would go on studying for the mechanism of fatigue breaking and preventing endodontic instrument from accidentally breaking.

在根管治疗中，由于金属疲劳导致的器械意外断裂是一个严重的问题。本研究的目的是探讨防止根管器械意外制动的方法。研制了疲劳断裂试验机，按ISO标准（3630- 1:20 92）测定了3把不锈钢铰刀和1把镍钛锉的断裂力矩、断裂角挠度。用扫描电镜观察断口形貌，并用电子探针x射线微量分析仪分析成分。研究结果如下：1。疲劳断裂试验机完全按照ISO标准工作。本机具有铝制卡盘，不作骨折及根管器械的改造。镍钛锉的组成为49.7原子。%镍和50.3原子。%钛。镍钛锉的硬度、弯曲力矩和断裂力矩均低于不锈钢铰刀。这些结果于1994年报告给岩手医科大学牙科学会，1995年报告给日本牙髓协会、国际牙科研究协会和日本保守牙科学会。我们将继续研究疲劳断裂的机理，防止根管器械意外断裂。

项目成果

久保田 稔: "NiTi合金製根管治療器具(Macファイル^<(R)>)の基礎的性状" 日本歯科保存学雑誌. 38. 645-653 (1995)

Minoru Kubota：“NiTi 合金根管治疗器械的基本特性（Mac 文件^<(R)>）”日本保守牙科杂志 38. 645-653 (1995)。

久保田稔: "NiTi合金製根管治療用器具(Macファイル^<(]CP○(1)R[)>の基礎的性状" 日本歯科保存学雑誌. 38. 645-653 (1995)

Minoru Kubota：“NiTi合金根管治疗器械的基本特性（Mac文件^<(]CP○(1)R[)>”）日本保守牙科杂志38. 645-653（1995）。

Minoru KUBOTA,Kiyotaka MINAMI,Rintaro TERATA and Yoshiyuki KUDOU: "Fundamental Properties of Nickel-Titanium Endodontic Instrument (Mac-file^<(R)>)" Japanese Journal of Conservative Dentistry. Vol.38.No.2. (1995)

Minoru KUBOTA、Kiyotaka MINAMI、Rintaro TERATA 和 Yoshiyuki KUDOU：“镍钛牙髓器械的基本特性（Mac 文件^<(R)>）”日本保守牙科杂志。