Comparative analysis of torsional and bending stresses in two mathematical models of nickel-titanium rotary instruments: ProTaper versus ProFile
Comparative analysis of torsional and bending stresses in two mathematical models of nickel-titanium rotary instruments: ProTaper versus ProFile
复制标题
DOI：
10.1097/00004770-200301000-00005
复制
发表时间：
2003-01-01
影响因子：
4.2
通讯作者：
Ibba, A
中科院分区：
文献类型：
--
作者：
Berutti, E;Chiandussi, G;Ibba, A
在根管器械过程中，镍钛旋转器械由于其解剖结构和它们必须切割的牙本质的硬度而在根管内受到持续的应力。本研究旨在通过有限元分析方法对两种镍钛旋转器械（ProTaper和ProFile）的力学行为进行比较，以产生数值评估。在研究过程中考虑了合金的非线性力学行为。在两个实验模型中，由于扭矩和弯矩的应力分布进行了比较。发现ProFile模型比ProTaper模型更具弹性。在相同载荷下，ProTaper模型显示出比ProFile模型更低和更好的分布应力。
During root canal instrumentation, nickel-titanium rotary instruments are subjected to continual stresses inside the canal due to its anatomy and the hardness of the dentin they must cut. They must therefore be both stress-resistant and elastic.This study aimed to compare the mechanical behavior of two nickel-titanium rotary instruments (ProTaper and ProFile) by applying the finite element analysis method to produce a numerical evaluation.The nonlinear mechanical behavior of the alloy was taken into account during the study. The distribution of stresses due to torsional and bending moments was compared in the two experimental models. The ProFile model was found to be more elastic than the ProTaper model. Under equal loads, the ProTaper model showed lower and better distributed stresses than the ProFile model.