Ali Afzal, Saraf Prahlad, Kamatagi Laxmikant, Khasnis Sandhya
Department of Conservative Dentistry and Endodontics, Pacific Dental College and Hospital, Udaipur, Rajasthan, India.
Department of Conservative Dentistry and Endodontics, PMNM Dental College and Hospital, Navanagar, Bagalkot, Karnataka, India.
Contemp Clin Dent. 2021 Jan-Mar;12(1):14-20. doi: 10.4103/ccd.ccd_31_20. Epub 2021 Mar 20.
The purpose of this study was to evaluate the centering ability, canal transportation and efficacy of re-treatment rotary and hand files in removing Gutta Percha from root canals using Cone Beam Computed Tomography(CBCT).
Sixty extracted human maxillary anteriors were obturated and randomly divided into three groups. Root fillings were removed with ProTaper Universal retreatment system, R-Endo system, and Hedstrom files. CBCT scans were taken.
The data were analyzed using the Statistical Package for the Social Sciences (SPSS 15.0, IBM). The mean and standard deviation among the groups was calculated by one-way analysis of variance, Kruskal-Wallis, and Mann- Whitney U-tests, and the comparison among the various groups was done by Tukey's test. A statistically significant amount of remaining root canal filling material and canal transportation was noted ( < 0.05).
No system completely removed the root filling material from root canals. Manual instrumentation resulted in more dentin loss and canal transportation than rotary file system.
本研究旨在使用锥形束计算机断层扫描（CBCT）评估再治疗旋转锉和手动锉从根管中去除牙胶的对中能力、根管偏移情况及效果。
选取60颗拔除的人上颌前牙进行根管充填，并随机分为三组。分别使用ProTaper通用再治疗系统、R-Endo系统和Hedstrom锉去除根管充填物。进行CBCT扫描。
使用社会科学统计软件包（SPSS 15.0，IBM）对数据进行分析。通过单因素方差分析、Kruskal-Wallis检验和Mann-Whitney U检验计算各组的均值和标准差，并通过Tukey检验对各组进行比较。观察到根管充填材料残留量和根管偏移具有统计学意义（<0.05）。
没有一种系统能完全从根管中去除根管充填材料。与旋转锉系统相比，手动器械操作导致更多的牙本质丧失和根管偏移。
