Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
Department of Periodontics and Endodontics, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA.
Int Endod J. 2019 Jul;52(7):1070-1076. doi: 10.1111/iej.13094. Epub 2019 Feb 22.
To compare the removal of root fillings in extracted teeth using the ProTaper Universal Retreatment system (PTUR) followed by a supplementary preparation with the XP-Endo Finisher file.
The mesiobuccal root canals of 30 extracted mandibular first molars were instrumented with ProTaper Universal NiTi files up to F2 and filled with one of the following sealers using a single-cone technique (n = 10): AH Plus, NeoMTA Plus and EndoSequence BC. The root fillings were removed using the PTUR system with additional apical preparation using ProTaper F2 and F3 files. Then, an additional preparation with an XP-Endo Finisher file was performed. The samples were scanned using micro-CT before and after retreatment and again after the use of the XP-Endo Finisher to assess the volume of remaining filling material. Data were analysed by Kruskal-Wallis and Friedman's two-way analysis of variance tests with Bonferroni correction.
No significant difference in the initial filling volume was observed amongst the groups (P > 0.05). The amount of filling materials in each group decreased significantly after retreatment with rotary files (P < 0.05). After initial retreatment, the volume of the remaining filling amongst the groups was similar (P > 0.05). Additional preparation with the XP-Endo Finisher improved the removal of filling materials regardless of the sealer type (P < 0.05).
In the mesiobuccal root canals of extracted mandibular first molars, additional preparation using an XP-Endo Finisher file, after using the PTUR system and F3 ProTaper instruments, enhanced the removal of filling materials from root canals.
比较使用 ProTaper Universal Retreatment 系统（PTUR）去除已拔出的下颌第一磨牙近中颊根管内的充填物，并用 XP-Endo Finisher 锉进行补充预备。
对 30 颗已拔出的下颌第一磨牙的近中颊根进行根管预备，使用 ProTaper Universal NiTi 锉至 F2 并使用以下其中一种封闭剂进行单根管充填技术（n=10）：AH Plus、NeoMTA Plus 和 EndoSequence BC。使用 PTUR 系统去除根管充填物，并用 ProTaper F2 和 F3 锉进行额外的根尖预备。然后，使用 XP-Endo Finisher 锉进行进一步的预备。在治疗前后和使用 XP-Endo Finisher 锉后，使用微 CT 对样本进行扫描，以评估剩余的充填材料的体积。采用 Kruskal-Wallis 和 Friedman 双向方差分析检验，并用 Bonferroni 校正进行数据分析。
各组初始充填体积无显著差异（P＞0.05）。用旋转锉进行再治疗后，各组的充填材料量均显著减少（P＜0.05）。初始再治疗后，各组剩余充填物的体积相似（P＞0.05）。使用 XP-Endo Finisher 锉进行进一步预备，无论密封剂类型如何，均可改善对充填材料的去除（P＜0.05）。
在已拔出的下颌第一磨牙的近中颊根管中，使用 PTUR 系统和 F3 ProTaper 锉进行初步治疗后，使用 XP-Endo Finisher 锉进行进一步预备，可增强对根管内充填材料的去除效果。
