Rios Marcos de Azevêdo, Villela Alexandre Mascarenhas, Cunha Rodrigo Sanches, Velasco Rafael Cortez, De Martin Alexandre Sigrist, Kato Augusto Shoji, Bueno Carlos Eduardo da Silveira
Department of Endodontics, Dental Research Center, São Leopoldo Mandic University, Campinas, São Paulo, Brazil.
Department of Endodontics, Sete Lagoas Dental Research Center, Salvador, Bahia, Brazil.
J Endod. 2014 Apr;40(4):543-6. doi: 10.1016/j.joen.2013.11.013. Epub 2013 Dec 31.
The maximum removal of root canal filling material is essential for successful endodontic retreatment. The purpose of this study was to assess the efficacy of 2 reciprocating systems (Reciproc [VDW, Munich, Germany] and WaveOne [Dentsply Maillefer, Ballaigues, Switzerland]) compared with a nickel-titanium (NiTi) rotary system (ProTaper Universal Retreatment [Dentsply Maillefer]) in the removal of root canal filling material.
Sixty root canals of extracted human maxillary incisors were prepared using the NiTi ProTaper rotary system with the complementary use of a #40 K-type file and then obturated. The specimens were divided into 3 groups (n = 20) according to the system used for filling removal: group 1: instrument R25 of the Reciproc system, group 2: primary instrument of the WaveOne system, and group 3: NiTi rotary instruments of the ProTaper Universal Retreatment system. The teeth were cleaved longitudinally and photographed under a dental operating microscope with 5 × magnification. Images were transferred to a computer, and residual filling material was quantified using Image Tool software (University of Texas Health Science Center, San Antonio, TX). Results were compared using 1-way analysis of variance (P < .05).
All teeth examined had filling remnants within the canal. No statistically significant difference (P > .05) in residual filling material was observed among the groups, with 4.30% in group 1, 2.98% in group 2, and 3.14% in group 3.
The Reciproc and WaveOne reciprocating systems were as effective as the ProTaper Universal retreatment system for gutta-percha and sealer removal.
彻底清除根管充填材料对于成功进行根管再治疗至关重要。本研究旨在评估两种往复式系统（Reciproc[德国慕尼黑VDW公司]和WaveOne[瑞士巴拉格Dentsply Maillefer公司]）与镍钛（NiTi）旋转系统（ProTaper Universal Retreatment[Dentsply Maillefer公司]）在去除根管充填材料方面的效果。
使用NiTi ProTaper旋转系统并辅以#40 K型锉对60颗拔除的人上颌切牙的根管进行预备，然后进行充填。根据用于去除充填物的系统将标本分为3组（每组n = 20）：第1组：Reciproc系统的R25器械；第2组：WaveOne系统的初级器械；第3组：ProTaper Universal Retreatment系统的NiTi旋转器械。将牙齿纵向劈开，在牙科手术显微镜下以5倍放大率拍照。图像传输至计算机，使用Image Tool软件（德克萨斯大学健康科学中心，圣安东尼奥，德克萨斯州）对剩余充填材料进行定量分析。使用单因素方差分析比较结果（P <.05）。
所有检查的牙齿根管内均有充填物残留。各组之间在残留充填材料方面未观察到统计学上的显著差异（P >.05），第1组为4.30%，第2组为2.98%，第3组为3.14%。
在去除牙胶和封闭剂方面，Reciproc和WaveOne往复式系统与ProTaper Universal再治疗系统效果相同。
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