Machado Ricardo, Comparin Daniel, Back Eduardo Donato Eing Engelke, Garcia Lucas da Fonseca Roberti, Alberton Luiz Rômulo
Clinical Practice Limited to Endodontics, Navegantes, Santa Catarina, Brazil.
Clinical Practice Limited to Endodontics, Cunha Porã, Santa Catarina, Brazil.
Eur J Dent. 2018 Jul-Sep;12(3):403-409. doi: 10.4103/ejd.ejd_259_17.
The purpose of this study was to compare the amount of residual smear layer after root canal instrumentation by using Ni-Ti, M-Wire, and CM-Wire instruments.
Seventy-two mandibular incisors were randomly divided into six groups according to the system used: WaveOne (WO), Reciproc (RP), Unicone (UC), ProTaper Next (PN), Mtwo (MT), and HyFlex (HF). Afterward, the specimens were cleaved in the mesiodistal and buccolingual direction for analysis by scanning electron microscopy.
Considering both directions and root canal thirds, there was no difference between HF, MT, and PN. RP, UC, and WO presented a significant difference between the directions, and the cervical third showed a significantly smaller quantity of residual smear layer compared with the apical third. When the systems were compared among them, there was a significant difference only between RP and WO.
Residual smear layer observed after instrumentation with the different systems was similar, except for quantities between the reciprocating systems.
本研究旨在比较使用镍钛器械、M-Wire器械和CM-Wire器械进行根管预备后残留玷污层的量。
72颗下颌切牙根据所使用的系统随机分为六组：WaveOne（WO）、Reciproc（RP）、Unicone（UC）、ProTaper Next（PN）、Mtwo（MT）和HyFlex（HF）。然后，将标本沿近远中方向和颊舌方向劈开，通过扫描电子显微镜进行分析。
综合考虑两个方向和根管的三个部分，HF、MT和PN之间没有差异。RP、UC和WO在不同方向之间存在显著差异，与根尖三分之一相比，颈三分之一的残留玷污层量显著更少。当对各系统进行相互比较时，仅RP和WO之间存在显著差异。
除往复式系统之间的量有所不同外，使用不同系统进行根管预备后观察到的残留玷污层相似。
