Berechet Diana, Rad Ioana Alexandra, Berce Cristian Petru, Bumbu Bogdan Andrei, Vicaş Răvan Marius, Berechet Mihail Claudius, Bumbu Gheorghe Adrian, Cîmpean Sanda Ileana
Department of Surgery, Faculty of Medicine and Pharmacy, University of Oradea, Romania;
Rom J Morphol Embryol. 2018;59(2):499-503.
ProTaper Next (Dentsply Maillefer, Ballaigues, Switzerland) (PTN) and One Shape New Generation (MicroMéga, Besançon, France) (OSNG) belong to a relatively new generation of rotary nickel-titanium (NiTi) files. Scientists keep improving features of endodontic files in order to obtain anatomically shaped and cleaned root canals and avoid canal transportation, for a better outcome of the endodontic treatment. For the current study, the aim was to evaluate and assess the changes in root canal morphology after instrumentation with PTN and OSNG by using micro-computed tomography (CT). This high-tech resolution tomography allows a much more detailed analysis of the root canal anatomy and its transformation after rotary instrumentation. We have selected 10 mandibular molars; before and after canal preparation, the samples were distributed in two homogeneous groups (PTN and OSNG groups) and submitted to standardized radiographs and micro-CT (SkyScan1172, Kontich, Belgium). From the three-dimensional (3D) images obtained from the scanning, we were able to perform a two-dimensional (2D) (perimeter, area and roundness), respectively a 3D (volume, surface area, structure model index) analysis, before and after root canal instrumentation. Results did not revealed important statistical differences among the two groups in relation to the curvature and volume of the root canals before instrumentation; after rotary instrumentation, there was a substantially increase of volume and surface area for all the samples (p<0.05). The two types of instruments preserved the original canal path, maintaining a continuous, safe and adequate shape and taper of the root canals.
ProTaper Next（登士柏迈徕福公司，瑞士巴拉格）（PTN）和One Shape新一代器械（法国贝桑松MicroMéga公司）（OSNG）属于新一代旋转镍钛（NiTi）锉。科学家们不断改进根管锉的特性，以便获得解剖形态良好且清洁的根管，避免根管偏移，从而提高根管治疗的效果。在本研究中，目的是通过显微计算机断层扫描（CT）评估和分析使用PTN和OSNG进行根管预备后根管形态的变化。这种高科技分辨率断层扫描能够更详细地分析根管解剖结构及其在旋转器械预备后的改变。我们选取了10颗下颌磨牙；在根管预备前后，将样本分为两个同质组（PTN组和OSNG组），并进行标准化X线片拍摄和显微CT扫描（比利时孔蒂奇的SkyScan1172）。从扫描获得的三维（3D）图像中，我们能够在根管预备前后分别进行二维（2D）（周长、面积和圆度）以及三维（3D）（体积、表面积、结构模型指数）分析。结果显示，在预备前，两组在根管弯曲度和体积方面没有显著的统计学差异；旋转器械预备后，所有样本的体积和表面积均显著增加（p<0.05）。这两种器械均保留了原始根管路径，保持了根管连续、安全且合适的形态和锥度。
