Department of Conservative Dentistry and Endodontics, Faculty of Dentistry, Manipal University College Malaysia, Jalan Batu Hamper, Bukit Baru, Melaka, Malaysia, Phone: +60 1127292297, e-mail:
Department of Conservative Dentistry and Endodontics, SRM Institute of Science and Technology, Chennai, Tamil Nadu, India.
J Contemp Dent Pract. 2023 Apr 1;24(4):221-227. doi: 10.5005/jp-journals-10024-3471.
The purpose of this study was to evaluate and compare the canal transportation tendencies and centering ability of the TruNatomy shaper (TN) and XP-endo shaper (XPS) rotary systems in oval-shaped canals with moderate root curvature (15°-25°), using cone-beam computed tomography (CBCT) imaging.
Sixty single-rooted permanent human teeth were chosen after considering the inclusion and exclusion criteria. The teeth were divided into two groups ( = 30). The test group was instrumented with TN files and the other with XPS according to manufacturer's instructions. CBCT images were taken before and after instrumentation to record the root canal distances from mesial, distal, buccal, and lingual borders of the root at 3, 5, and 7 mm distances from the root apex using a specific formula. Statistical analysis was done using the Statistical Package for the Social Sciences software program, version 20.0. The data were analyzed using the unpaired test.
Both TN and XPS were safe for use in oval-shaped canals with moderate root curvature. However, the XPS showed higher buccolingual transportation as compared with TN at 3 mm from the apex and higher mesiodistal transportation at 3 and 5 mm levels from the apex as compared with TN.
Canal transportation has been detected in both systems; however, the values obtained were within the safe range (<0.3 mm). Overall, no significant difference was observed between TN and XPS ( > 0.05) in their canal transportation tendencies and centering ability.
The study assesses the canal centering and transportation tendencies of the recently launched TN rotary system in extracted teeth with a combination of morphologies. The findings of the study are significant clinically as minimum transportation of the canal, minimal dentin removal, efficient disinfection, and three-dimensional obturation of the root canal are considered important factors in deciding the prognosis of endodontic therapy.
本研究旨在通过锥形束计算机断层扫描（CBCT）成像评估和比较在具有中度根尖弯曲（15°-25°）的椭圆形根管中，TruNatomy 塑形器（TN）和 XP-endo 塑形器（XPS）旋转系统的根管输送趋势和中心定位能力。
选择符合纳入和排除标准的 60 颗单根恒牙。将牙齿分为两组（n=30）。实验组按照制造商的说明用 TN 锉进行器械预备，另一组用 XPS 锉进行器械预备。在器械预备前后拍摄 CBCT 图像，使用特定公式记录根尖 3、5、7mm 处从根管近中、远中、颊舌边界至根管的根距离。使用社会科学统计软件包，版本 20.0 进行统计分析。使用非配对 t 检验对数据进行分析。
TN 和 XPS 均适用于中度根尖弯曲的椭圆形根管。然而，与 TN 相比，XPS 在根尖 3mm 处显示出更高的颊舌向输送，在根尖 3 和 5mm 处显示出更高的近远中输送。
两种系统都检测到了根管输送，但获得的值在安全范围内（<0.3mm）。总体而言，TN 和 XPS 之间在根管输送趋势和中心定位能力方面没有观察到显著差异（>0.05）。
本研究评估了最近推出的 TN 旋转系统在具有多种形态的离体牙中的根管中心定位和输送趋势。研究结果在临床上具有重要意义，因为最小的根管输送、最小的牙本质去除、有效的消毒和根管的三维封闭被认为是决定牙髓治疗预后的重要因素。
