Postgraduate Program for Specialized Endodontics, Faculty of Medical Sciences, School of Odontology, University of El Salvador/Argentine Dental Association, Buenos Aires, República Argentina.
J Endod. 2011 Sep;37(9):1279-82. doi: 10.1016/j.joen.2011.05.036. Epub 2011 Jul 20.
This ex vivo study evaluated the cleanliness of curved root canal walls after chemomechanical instrumentation using two automated systems versus manual instrumentation while using a standardized irrigation protocol.
Thirty mesial root canals of extracted human first and second mandibular molars were prepared with the TiLOS hybrid engine-driven instrumentation system (Ultradent Products Inc, South Jordan, UT) (n = 10), ProTaper engine-driven file series (n = 10), and manual instrumentation (n = 10). Irrigation was performed using alternately 5.25% sodium hypochlorite and 17% EDTA followed by rinsing with distilled water. After the roots were split longitudinally, the presence of debris and/or smear layer was visualized using serial scanning electron microscopic digital photomicrographs taken at 1, 5, and 10 mm from the working length. Mean scores for debris and the smear layer were calculated and statistically analyzed for significance (P < .05) between groups using the Kruskal-Wallis nonparametric analysis of variance and Dunn tests. The data obtained at each evaluation level for each group were analyzed using the Friedman and Tukey multiple comparison tests.
No significant differences (P > .05) were found between TiLOS and ProTaper (Dentsply/Tulsa Dental, Tulsa, OK) groups, whereas both performed significantly better than the manual instrumentation group.
Engine-driven TiLOS and ProTaper instrumentation systems combined with a standardized irrigation protocol produced cleaner root canal walls than the manual instrumentation technique although complete cleanliness was not achieved.
本离体研究评估了使用两种自动化系统（TiLOS 混合引擎驱动器械系统[Ultradent Products Inc，南约旦，犹他州]和 ProTaper 引擎驱动锉系列）与手动器械相比，在使用标准化冲洗方案时，对弯曲根管壁进行化学机械预备后的清洁度。
用 TiLOS 混合引擎驱动器械系统（Ultradent Products Inc，南约旦，犹他州）（n = 10）、ProTaper 引擎驱动锉系列（n = 10）和手动器械（n = 10）对 30 个来自下颌第一和第二磨牙的近中根管进行预备。冲洗采用 5.25%次氯酸钠和 17% EDTA 交替进行，然后用蒸馏水冲洗。在根部分为纵向两半后，使用连续扫描电子显微镜数字照片，从工作长度开始 1、5 和 10mm 处观察碎屑和/或玷污层的存在。计算碎屑和玷污层的平均得分，并使用 Kruskal-Wallis 非参数方差分析和 Dunn 检验对各组之间的差异进行统计分析（P <.05）。使用 Friedman 和 Tukey 多重比较检验对每组在每个评估水平获得的数据进行分析。
TiLOS 和 ProTaper（Dentsply/Tulsa Dental，塔尔萨，俄克拉荷马州）组之间未发现显著差异（P >.05），而这两组的表现均明显优于手动器械组。
与手动器械技术相比，引擎驱动的 TiLOS 和 ProTaper 器械系统联合标准化冲洗方案可产生更清洁的根管壁，但未达到完全清洁。
