Comparison of Conventional and New-generation Nickel-Titanium Files in Regard to Their Physical Properties
Comparison of Conventional and New-generation Nickel-Titanium Files in Regard to Their Physical Properties
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DOI：
10.1016/j.joen.2014.06.009
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发表时间：
2014-11-01
影响因子：
4.2
通讯作者：
Hayashi, Yoshihiko
中科院分区：
文献类型：
--
作者：
Tsujimoto, Masaki;Irifune, Yuu;Hayashi, Yoshihiko
简介：本研究调查了各种镍钛（NiTi）锉的表面、断裂结构和与循环疲劳相关的物理化学性能。研究方法：在总共10组NiTi锉中，常规NiTi锉（ProFile [Dentsply Maillefer，Ballaigues，Switzerland]和K3 [SybronEndo，橙子，CAD和新一代NiTi文件（ProFile Vortex [PV;塔尔萨牙科专业，塔尔萨，OK]，Vortex Blue [VB;塔尔萨牙科专业]和K3 XF [XF; SybronEndo，橙子，CA]），具有相同的头端直径（ISO尺寸25）和2种锥度（0.04和0.06）。对锉刀表面结构进行了扫描电镜观察、差示扫描量热仪分析和循环疲劳抗力测试。结果：在锉体表面可识别出许多机械性沟槽。ProFile组中的表面与其他文件中观察到的表面相比非常光滑。XF组除机械沟外，表面可见许多浅凹。在ProFile、K3和PV组中观察到平滑曲线。在VB和XF组中观察到差示扫描量热法中的限定峰。在所有组中，0.04锥度锉的断裂循环次数均高于0.06锥度锉（P
Introduction: This study investigated the surface, fractured structure, and physicochemical properties related to cyclic fatigue in various nickel-titanium (NiTi) files. Methods: Among a total of 10 groups of NiTi files, conventional NiTi - files (ProFile [Dentsply Maillefer, Ballaigues, Switzerland] and K3 [SybronEndo, Orange, CAD and new-generation NiTi files (ProFile Vortex [PV; Tulsa Dental Specialties, Tulsa, OK], Vortex Blue [VB; Tulsa Dental Specialties], and K3 XF [XF; SybronEndo, Orange, CA]) with the same tip diameter (ISO size 25) and 2 types of taper (0.04 and 0.06) were used in this study. Scanning electron microscopy of the file surface structure, differential scanning calorimetry, and cyclic fatigue resistance tests were conducted. Results: Many mechanical grooves were recognized on the file surface. The surface in the ProFile group was extremely smooth compared with that observed for the other files. Many shallow hollows besides mechanical grooves were noted on the surface in the XF group. A smooth curve was observed in the ProFile, K3, and PV groups. Defined peaks in differential scanning calorimetry were observed in the VB and XF groups. The 0.04 taper files exhibited a statistically higher number of cycles to fracture than the 0.06 taper files in all groups (P