Madhu Kumari, Karade Priyatam, Chopade Rutuja, Jadhav Yogesh, Chodankar Kirti, Alane Uddhav
Department of Conservative Dentistry and Endodontics, SwargiyaDadasaheb KalmeghSmruti Dental College and Hospital, Nagpur, Maharashtra, India.
Department of Conservative Dentistry & Endodontics Vasantdadapatil Dental College and Hospital, Kavalapur, Sangli, Maharashtra, India.
Front Dent. 2021 Jun 3;18:19. doi: 10.18502/fid.v18i19.6326. eCollection 2021.
This study aimed to evaluate the efficacy of ProTaper, Mtwo, and WaveOne retreatment files and Hedstrom files for removal of gutta-percha from the straight root canals using cone-beam computed tomography (CBCT). Forty freshly extracted single-rooted and single-canal teeth were selected for this study. The teeth were decoronated, and biomechanical preparation was performed up to #30 K-file. The root canals were obturated using lateral compaction technique with gutta-percha and Resilon sealer. The teeth were then randomly divided into 4 groups, and CBCT images were obtained. All the canals were then retreated with either ProTaper retreatment files, Mtwo retreatment files, WaveOne files, or Hedstrom files. The surface area of the remaining filling material after the retreatment procedure was quantified by CBCT. Statistical analysis was performed via one-way ANOVA and the Tukey-Kramer multiple comparisons test. None of the file systems could completely remove the filling material from the canals. Data analysis revealed significant differences between the groups in the apical and middle thirds (P<0.05). All the file systems left some filling material in the canals. Mtwo retreatment files had maximum efficacy for removal of filling materials in comparison with other files. WaveOne files can also be used for root canal retreatment.
本研究旨在使用锥形束计算机断层扫描（CBCT）评估ProTaper、Mtwo、WaveOne再治疗锉和Hedstrom锉从直根管中去除牙胶的效果。本研究选取了40颗新鲜拔除的单根单根管牙齿。对牙齿进行去冠处理，并使用#30 K锉进行生物力学预备。采用侧向加压技术用牙胶和Resilon封闭剂对根管进行充填。然后将牙齿随机分为4组，并获取CBCT图像。随后，所有根管分别使用ProTaper再治疗锉、Mtwo再治疗锉、WaveOne锉或Hedstrom锉进行再治疗。再治疗后通过CBCT对剩余充填材料的表面积进行量化。通过单因素方差分析和Tukey-Kramer多重比较检验进行统计分析。没有一种锉系统能够完全从根管中去除充填材料。数据分析显示，各组在根尖和中三分之一处存在显著差异（P<0.05）。所有锉系统在根管中都残留了一些充填材料。与其他锉相比，Mtwo再治疗锉在去除充填材料方面效果最佳。WaveOne锉也可用于根管再治疗。
