Effectiveness of Different Irrigant Agitation Techniques on Debris and Smear Layer Removal in Curved Root Canals: A Scanning Electron Microscopy Study
Effectiveness of Different Irrigant Agitation Techniques on Debris and Smear Layer Removal in Curved Root Canals: A Scanning Electron Microscopy Study
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DOI：
10.1016/j.joen.2010.08.056
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发表时间：
2010-12-01
影响因子：
4.2
通讯作者：
Huelsmann, Michael
中科院分区：
文献类型：
--
作者：
Roedig, Tina;Doellmann, Stefan;Huelsmann, Michael
简介：本研究的目的是评价不同冲洗液搅拌技术对弯曲根管中碎屑和玷污层去除的清洁效果。研究方法：用镍钛器械对108颗下颌磨牙近中颊根管进行根管成形，最后用NaOCl和乙二胺四乙酸进行冲洗。将样本分为4组（n = 20），并采用以下冲洗搅拌技术：无搅拌（对照）、超声波、Endo Activator和CanalBrush。根管纵向分裂，并进行扫描电子显微镜。分别使用200倍和1000倍放大率的5级评分系统评价冠状面和根尖水平是否存在碎屑和玷污层。结果：关于碎片清除，未检测到组间差异。在冠状面区域，冲洗液的搅拌导致比对照组显著更多的玷污层去除。EndoActivator的有效性显著高于超声搅拌和CanalBrush。结论：在弯曲的根管，活化的NaOCl和乙二胺四乙酸没有提高碎片清除，但导致显着更有效的玷污层去除冠水平。（J Endod 2010;36：1983-1987）
Introduction: The aim of this study was to evaluate the cleaning efficacy of different irrigant agitation techniques on debris and smear layer removal in curved root canals. Methods: Mesiobuccal root canals of 108 mandibular molars were shaped with nickel-titanium instruments, and a final rinse of NaOCl and ethylenediaminetetraacetic acid was performed. Specimens were assigned to 4 groups (n = 20) and submitted to the following irrigation agitation techniques: no agitation (control), ultrasonic, Endo Activator, and CanalBrush. Root canals were split longitudinally and subjected to scanning electron microscopy. The presence of debris and smear layer at coronal and apical levels was evaluated by using a 5-grade scoring system with 200x and 1000 x magnification, respectively. Results: Concerning debris removal, no significant differences among groups were detected. In the coronal region, agitation of the irrigants resulted in significantly more smear layer removal than the control. EndoActivator was significantly more effective than ultrasonic agitation and CanalBrush. Conclusions: In curved root canals, activation of NaOCl and ethylenediaminetetraacetic acid did not enhance debris removal but resulted in significantly more effective smear layer removal at coronal levels. (J Endod 2010;36:1983-1987)