Suk Mateja, Bago Ivona, Katić Marko, Šnjarić Damir, Munitić Marija Šimundić, Anić Ivica
School of Dental Medicine University of Zagreb, Zagreb, Croatia.
Department of Endodontics and Restorative Dentistry, School of Dental Medicine University of Zagreb, Gunduliceva 5, 10000, Zagreb, Croatia.
Lasers Med Sci. 2017 Dec;32(9):2055-2062. doi: 10.1007/s10103-017-2325-4. Epub 2017 Sep 19.
The aim of the study was to evaluate the efficacy of photon-initiated photoacoustic streaming (PIPS) in the removal of filling remnants from root canals after rotary phase of retreatment and to examine the difference in the amount of residual material considering the type of sealer. Thirty-six extracted single-rooted human teeth were instrumented and randomly divided into three groups according to the filling material used: group 1: EndoSequence BC Sealer (Brassler, USA), group 2: MTA Fillapex (Angelus Solucoes Odontologicas, Londrina, Brasil), and group 3: AH Plus sealer (Dentsply DeTrey, Konstanz, Germany). Cold lateral condensation technique was used. After 2 weeks, the root canals were retreated with a rotary phase retreatment system (ProTaper Universal Retreatment, Maillefer, Ballaigues, Switzerland), followed by Er:YAG laser-activated irrigation (photon-initiated photoacoustic streaming, PIPS). The specimens were scanned in a micro-computed tomographic (micro-CT) device after root canal filling, after the rotary retreatment, and after the PIPS. There was significant reduction in the amount of filling material after the rotary phase of retreatment in all groups (p < 0.05), the highest in the MTA Fillapex group (p < 0.001) and no difference between the EndoSequence BC and the AH Plus (p = 0.608). There was significant reduction of the filling remnants after the PIPS in all groups (p < 0.05). The MTA Fillapex was the most easily removed during rotary phase of the retreatment, and there were no differences in the amount of the remaining filling material between EndoSequence BC and the AH Plus groups after rotary phase of the retreatment. The PIPS improved the removal of filling remnants in all groups.
本研究的目的是评估光子引发的光声流（PIPS）在根管再治疗旋转阶段后去除根管内充填物残渣的效果，并考虑封闭剂类型，研究残余材料量的差异。选取36颗拔除的单根人牙进行预备，并根据所使用的充填材料随机分为三组：第1组：EndoSequence BC封闭剂（美国Brassler公司），第2组：MTA Fillapex封闭剂（巴西隆德里纳市Angelus Solucoes Odontologicas公司），第3组：AH Plus封闭剂（德国康斯坦茨市登士柏德瑞公司）。采用冷侧方加压充填技术。2周后，使用旋转再治疗系统（瑞士拜尔莱格市迈耶费尔公司的ProTaper Universal Retreatment）对根管进行再治疗，随后进行铒激光激活冲洗（光子引发的光声流，PIPS）。在根管充填后、旋转再治疗后以及PIPS治疗后，使用微型计算机断层扫描（micro-CT）设备对标本进行扫描。所有组在再治疗旋转阶段后充填材料量均显著减少（p < 0.05），MTA Fillapex组减少量最高（p < 0.001），EndoSequence BC组和AH Plus组之间无差异（p = 0.608）。所有组在PIPS治疗后充填残渣均显著减少（p < 0.05）。在再治疗旋转阶段，MTA Fillapex最容易被去除，再治疗旋转阶段后，EndoSequence BC组和AH Plus组剩余充填材料量无差异。PIPS改善了所有组中充填残渣的去除情况。
