Comparative Study of Different Novel Nickel-Titanium Rotary Systems for Root Canal Preparation in Severely Curved Root Canals
Comparative Study of Different Novel Nickel-Titanium Rotary Systems for Root Canal Preparation in Severely Curved Root Canals
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DOI：
10.1016/j.joen.2013.10.010
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发表时间：
2014-06-01
影响因子：
4.2
通讯作者：
Ertas, Elif Tarim
中科院分区：
文献类型：
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作者：
Capar, Ismail Davut;Ertas, Huseyin;Ertas, Elif Tarim
前言：应用锥束计算机断层扫描(CBCT)技术，比较了6种不同旋转系统对下颌磨牙近中弯曲根管的运输、根管弯曲度、中心率、表面积和体积变化的影响。方法：120颗下颌第一磨牙近中颊根管，弯曲角度20°~40°，分为6组，每组20个根管。根据内固定前所拍摄的CBCT图像，在根管弯曲角度和半径方面对两组进行平衡。使用以下系统进行根管成形：OneShape(OS)(MicroMega，Besancon，法国)、ProTaper Universal(PU)F2(Dentsply Maillefer，瑞士Ballaigues)、ProTaper Next X2(Dentsply Maillefer)、Reciproc(R)R25(VOW，德国慕尼黑)、Twisted FileAdapting(TFA)SM2(Sybraenddo，Orange，CA)和WAVEONE PRIMARY(Dentsply Tulsa Dental Specialties，Tulsa，OK)。在根管预备后，用CBCT成像评价根管的变化。显着性水平设为P=0.05。结果：R系统去除牙本质的量显著高于OS、PU和TFA系统(P<；0.05)。6组内固定后的运输能力、根管弯曲度、表面积变化及中心率均无显著差异。结论：在下颌磨牙近中根管预备中，6种不同的根管预备系统对根管弯曲的矫直效果相似，对根管的运输作用相似。与OS、TFA和PU系统相比，R器械在体积变化方面表现出更好的性能。
Introduction: We compared the effects of 6 different rotary systems on transportation, canal curvature, centering ratio, surface area, and volumetric changes of curved mesial root canals of mandibular molar via cone-beam computed tomographic (CBCT) imaging. Methods: Mesiobuccal root canals of 120 mandibular first molars with an angle of curvature ranging from 20 degrees-40 degrees were divided into 6 groups of 20 canals. Based on CBCT images taken before instrumentation, the groups were balanced with respect to the angle and radius of canal curvature. Root canals were shaped with the following systems with an apical size of 25: OneShape (OS) (MicroMega, Besancon, France), ProTaper Universal (PU) F2 (Dentsply Maillefer, Ballaigues, Switzerland), ProTaper Next X2 (Dentsply Maillefer), Reciproc (R) R25 (VOW, Munich, Germany), Twisted File Adaptive (TFA) SM2 (SybronEndo, Orange, CA), and WaveOne primary (Dentsply Tulsa Dental Specialties, Tulsa, OK). After root canal preparation, changes were assessed with CBCT imaging. The significance level was set at P = .05. Results: The R system removed a significantly higher amount of dentin than the OS, PU, and TFA systems (P < .05). There was no significant difference among the 6 groups in transportation, canal curvature, changes of surface area, and centering ratio after instrumentation. Conclusions: The 6 different file systems straightened root canal curvature similarly and produced similar canal transportation in the preparation of mesial canals of mandibular molars. R instrumentation exhibited superior performance compared with the OS, TFA, and PU systems with respect to volumetric change.