Effects of Two Nickel-Titanium Instrument Systems, Mtwo versus ProTaper Universal, on Root Canal Geometry Assessed by Micro-Computed Tomography
Effects of Two Nickel-Titanium Instrument Systems, Mtwo versus ProTaper Universal, on Root Canal Geometry Assessed by Micro-Computed Tomography
复制标题
两种镍钛仪器系统（Mtwo 与 ProTaper Universal）对微型计算机断层扫描评估的根管几何形状的影响
DOI：
10.1016/j.joen.2011.06.024
复制
发表时间：
2011-10-01
影响因子：
4.2
通讯作者：
Wu, Hongkun
中科院分区：
文献类型：
--
作者：
Yang, Guobin;Yuan, Guohua;Wu, Hongkun
Introduction: The aim of this study was to compare the effects of Mtwo and Pro Taper Universal (PTU) on root canal geometry three-dimensionally by using micro computed tomography. Methods: A total of 20 canals were prepared with Mtwo or PTU system. Microcomputed tomography scanner was used to scan the specimens before and after instrumentation. Three-dimensional images were reconstructed. The parameters evaluated included canal surface area, volume, structure model index, thickness, straightening, canal transportation, and uninstrumented surface area. Results: Preparation significantly changed canal surface area, volume, structure model index, thickness, and canal curvature. There were no significant differences between instrument types concerning these parameters and uninstrumented surface area. The canals prepared with PTU showed larger values of transportation compared with those in Mtwo group at the apical third. Conclusions: Both of the instrumentation systems produced canal preparations with adequate geometry. PTU produced larger transportation at apical third. (J Endod 2011;37:1412-1416)
