Bueno Carlos Eduardo da Silveira, Rios Marcos de Azevêdo, Coelho Marcelo Santos, Villela Alexandre Mascarenhas, de Martin Alexandre Sigrist, Kato Augusto Shoji, Alves Vanessa de Oliveira, Cunha Rodrigo Sanches
Department of Endodontics, São Leopoldo Mandic Dental Research Center, Campinas, Brazil.
Division of Endodontics, University of Manitoba, Winnipeg, Manitoba, Canada.
Eur Endod J. 2017 May 8;2(1):1-5. doi: 10.5152/eej.2017.16062. eCollection 2017.
This study evaluates the efficacy of passive ultrasonic irrigation (PUI) in removing root canal filling material from endodontically treated teeth after using one of two reciprocating systems, Reciproc (VDW, Munich, Germany) or WaveOne (Dentsply Maillefer, Ballaigues, Switzerland), or one nickel-titanium (NiTi) rotary system, ProTaper Universal Retreatment (Dentsply Maillefer).
One hundred and twenty straight root canals of extracted human maxillary incisors were instrumented and then obturated. The specimens were divided into six groups (n=20) as follows: Group R, Reciproc R25 instrument without PUI; Group W, WaveOne Primary instrument without PUI; Group PT, ProTaper Universal Retreatment system without PUI; Group R-PUI, Reciproc R25 with PUI; Group W-PUI, WaveOne Primary with PUI and Group PT-PUI, ProTaper Universal Retreatment system with PUI. After removing the filling material, the teeth were cleaved longitudinally and photographed. The total canal space and remaining material were quantified with the aid of an imaging software tool. The Kruskal-Wallis test was used to identify significant differences between the groups.
No statistically significant differences (P>0.05) in residual filling material were observed between the groups.
The use of PUI did not improve the removal of filling material from the root canals, regardless of the previously used instrumentation system.
本研究评估在使用两种往复式系统（Reciproc，德国慕尼黑VDW公司；WaveOne，瑞士巴拉格Dentsply Maillefer公司）之一或一种镍钛（NiTi）旋转系统ProTaper Universal Retreatment（Dentsply Maillefer公司）对牙髓治疗后的牙齿进行根管预备后，被动超声冲洗（PUI）去除根管充填材料的效果。
选取120颗拔除的人上颌中切牙的直根管进行预备，然后充填。将标本分为六组（n = 20），如下：R组，使用Reciproc R25器械且不进行PUI；W组，使用WaveOne Primary器械且不进行PUI；PT组，使用ProTaper Universal Retreatment系统且不进行PUI；R - PUI组，使用Reciproc R25并进行PUI；W - PUI组，使用WaveOne Primary并进行PUI；PT - PUI组，使用ProTaper Universal Retreatment系统并进行PUI。去除充填材料后，将牙齿纵向劈开并拍照。借助成像软件工具对根管总空间和剩余材料进行定量分析。采用Kruskal - Wallis检验确定各组间的显著差异。
各组间在残余充填材料方面未观察到统计学显著差异（P > 0.05）。
无论先前使用的器械系统如何，使用PUI均未改善根管内充填材料的去除效果。
