Faculdade São Leopoldo Mandic, Instituto de Pesquisa São Leopoldo Mandic, Endodontia, Campinas, São Paulo, Brazil.
Laboratory of Nuclear Instrumentation, Alberto Luiz Coimbra Institute for Graduate Studies and Research in Engineering, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil.
J Endod. 2020 Dec;46(12):1901-1906. doi: 10.1016/j.joen.2020.09.010. Epub 2020 Sep 19.
The aim of this study was to conduct a micro-computed tomographic assessment of the effectiveness of 3 supplementary cleaning techniques in reducing the residual volume of gutta-percha and a bioceramic sealer after performing endodontic retreatment procedures in teeth with oval canals.
Thirty-six mandibular premolars were instrumented with the ProTaper Next system (instruments X1-X3; Dentsply Maillefer, Ballaigues, Switzerland) and filled with gutta-percha and Bio-C Sealer (Angelus, Londrina, PR, Brazil) using the single-cone technique. The teeth were reinstrumented with the Reciproc R40 instrument (VDW, Munich, Germany) and divided into 3 groups according to the supplementary cleaning technique used (n = 12): ultrasonic-assisted irrigation (UAI), EndoActivator (Dentsply Tulsa Dental Specialties, Tulsa, OK) irrigation (EAI), or the XP-endo Finisher R system (XPR; FKG Dentaire, La Chaux-de-Fonds, Switzerland). Micro-computed tomographic imaging was used to quantify the residual volume of filling material. One-way analysis of variance complemented by the Tukey test was used to perform the statistical analysis (P < .05).
Significant reductions were obtained in the residual filling material after supplementary cleaning (P < .05). XPR (47.5%) led to significantly greater (P < .05) filling material removal than UAI (16.6%) or EAI (22.6%). The removal values of the 2 latter systems were not significantly different.
XPR was more effective than UAI and EAI in removing filling material in mandibular premolars with oval canals. None of the tested supplementary cleaning techniques completely removed the residual filling material.
本研究的目的是通过微计算机断层扫描评估 3 种补充清洁技术在减少根管再治疗后椭圆形根管牙内 gutta-percha 和生物陶瓷封闭剂残留体积方面的有效性。
36 颗下颌前磨牙采用 ProTaper Next 系统（仪器 X1-X3；Dentsply Maillefer，Ballaigues，瑞士）进行器械预备，并采用单尖技术用 gutta-percha 和 Bio-C 封闭剂（Angelus，Londrina，PR，巴西）进行根管充填。采用 Reciproc R40 器械（VDW，慕尼黑，德国）对牙齿进行再预备，并根据使用的补充清洁技术将牙齿分为 3 组（n = 12）：超声辅助冲洗（UAI）、EndoActivator（Dentsply Tulsa Dental Specialties，塔尔萨，OK）冲洗（EAI）或 XP-endo Finisher R 系统（XPR；FKG Dentaire，拉绍德封，瑞士）。采用微计算机断层扫描成像技术对充填材料的残留体积进行定量分析。采用单因素方差分析（ANOVA），并通过 Tukey 检验进行统计分析（P <.05）。
补充清洁后残留的充填材料明显减少（P <.05）。XPR（47.5%）的去除效果明显优于 UAI（16.6%）或 EAI（22.6%）（P <.05）。后两种系统的去除效果无显著差异。
XPR 比 UAI 和 EAI 更有效地去除椭圆形根管下颌前磨牙内的充填材料。没有一种测试的补充清洁技术能完全去除残留的充填材料。
