Department of Stomatology, Affiliated Hospital of Jining Medical University, China; Division of Endodontics, Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Canada.
Division of Endodontics, Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Canada.
J Dent. 2021 Sep;112:103734. doi: 10.1016/j.jdent.2021.103734. Epub 2021 Jun 25.
To investigate the effectiveness of XP-endo Shaper (XPS) and XP-endo Finisher R (XPFR) instruments in removing aged root filling material from root-treated mandibular molars.
Thirty mandibular molars were instrumented and divided into three groups: single-cone obturation using AH Plus sealer (AHS) or EndoSequence BC sealer (BCS), and warm vertical compaction using AH Plus sealer (AHW). The specimens were stored at 100% humidity and 37 °C for 54 months. Retreatment was performed using XPS and XPFR. Micro-computed tomography was used to scan the specimens after 54 months, after XPS retreatment and after the supplementary approach using XPFR.
The XPS removed more filling material in the BCS and AHS groups, compared with the AHW group (P < 0.05). After supplementary instrumentation XPFR, the proportion of the remaining filling material decreased significantly in all groups (P < 0.05). The XPFR instruments were more efficient in removing filling material in the BCS group than in the AHS or AHW group (P < 0.05). The combined use of XPS and XPFR instruments efficiently removed filling material in the BCS group, followed by the AHS and AHW groups (P < 0.05).
Although the combined use of XPS and XPFR instruments helped remove the bulk of aged root filling material from mandibular molars, material removal from canals filled using warm vertical condensation in the critical apical area remains a concern.
Removal of the aged filling materials using XP-endo instruments from the apical area is challenging when instrumented root canals are filled using warm vertical condensation.
研究 XP-endo Shaper（XPS）和 XP-endo Finisher R（XPFR）器械在去除下颌磨牙陈旧根管充填材料方面的有效性。
将 30 颗下颌磨牙分为三组：AH Plus 封固剂（AHS）或 EndoSequence BC 封固剂（BCS）单根管充填，AH Plus 封固剂（AHW）热垂直加压充填。标本在 100%湿度和 37°C 下储存 54 个月。使用 XPS 和 XPFR 进行再治疗。在 54 个月后、XPS 再治疗后和使用 XPFR 补充治疗后，使用微计算机断层扫描对标本进行扫描。
与 AHW 组相比，XPS 去除了 BCS 组和 AHS 组更多的充填材料（P<0.05）。补充使用 XPFR 后，所有组的剩余充填材料比例均显著下降（P<0.05）。XPFR 器械在 BCS 组中去除充填材料的效率高于 AHS 或 AHW 组（P<0.05）。XPS 和 XPFR 联合使用可有效去除 BCS 组的充填材料，其次是 AHS 和 AHW 组（P<0.05）。
尽管联合使用 XPS 和 XPFR 器械有助于去除下颌磨牙陈旧根管充填材料，但在根管使用热垂直加压充填时，在根尖区去除材料仍然是一个问题。
在根管使用热垂直加压充填时，使用 XP-endo 器械从根尖区去除陈旧的充填材料具有挑战性。
