Influence of structure on nickel-titanium endodontic instruments failure
Influence of structure on nickel-titanium endodontic instruments failure
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DOI：
10.1097/00004770-200108000-00005
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发表时间：
2001-08-01
影响因子：
4.2
通讯作者：
Jordan, L
中科院分区：
文献类型：
--
作者：
Kuhn, G;Tavernier, B;Jordan, L
本工作的目的是调查镍钛根管器械折断寿命的历史过程。这些结果是基于基于X射线衍射、扫描电子显微镜和显微硬度测试的镍钛发动机驱动旋转仪器的微观结构研究得出的。根管治疗用的锉非常坚硬，合金中有高密度的缺陷，可能会干扰相变。显微硬度维克斯证实了这些观察结果(位错和析出物)。X射线显示实验谱线展宽，这是扭曲晶格的典型特征。牙髓的表面状态(扫描电子显微镜)是导致失败和断裂的重要因素。
The purpose of this work was to investigate the process history on fracture life of nickel-titanium endodontics files. The results are based on microstructural investigations of nickel-titanium engine-driven rotary instruments based on X-ray diffraction, scanning electron microscopy, and microhardness tests. Endodontic files are very work-hardened, and there is a high density of defects in the alloy that can disturb the phase transformation. The microhardness Vickers confirmed these observations (dislocations and precipitates). The X-rays show that experimental spectrum lines are extended, typical of a distorted lattice. The surface state of the endodontic files (scanning electron microscopy) is an important factor in failure and fracture initiation.