Efficacy of Smear Layer Removal at the Root Tip by Using Ethylenediaminetetraacetic Acid and Erbium, Chromium: Yttrium, Scandium, Gallium Garnet Laser
Efficacy of Smear Layer Removal at the Root Tip by Using Ethylenediaminetetraacetic Acid and Erbium, Chromium: Yttrium, Scandium, Gallium Garnet Laser
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DOI：
10.1016/j.joen.2011.08.022
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发表时间：
2011-11-01
影响因子：
4.2
通讯作者：
Suardita, Ketut
中科院分区：
文献类型：
--
作者：
Peeters, Harry Huiz;Suardita, Ketut
简介：本研究的目的是比较激光冲洗和超声冲洗在去除根管玷污层和清除根尖区（根尖）的效果。方法：将40颗离体直形单根牙随机分为4组（n = 10）。通过使用手动工具将样本塑形，最大尺寸为30/.02锉（对照组、激光1组和激光2组）或20/.02锉（激光3组）。在器械操作过程中，每个根管在使用连续锉之间交替用3% NaOCl和17%乙二胺四乙酸冲洗。如下处理4组10颗牙齿。在对照组中，用17%乙二胺四乙酸冲洗牙齿，并用超声装置激活冲洗液60秒。在激光1和激光3组中，用激光激活冲洗液60秒。在激光2组中，用激光激活冲洗液30秒。结果如下：激光1组与对照组（P <0.001）、激光2组（P = 0.002）和激光3组（分别为P = 0.012和P = 0.013）的玷污层和碎屑评分之间存在显著差异。激光1组根管完全清洁。结论：使用具有普通纤维尖端的激光，其在冲洗液中产生空化，具有作为用于从直根管的根尖区域去除玷污层的改进的替代方法的潜力。（J Endod 2011;37：1585-1589）
Introduction: The purpose of this study was to compare the efficacy of laser-driven irrigation in removing the smear layer and debriding the apical region of the root canal (the root tip) with that of ultrasonic irrigation. Methods: Forty extracted human teeth with straight single roots were randomized into 4 groups (n = 10). The specimens were shaped by using hand instruments up to a size 30/.02 file (Control, Laser 1, and Laser 2 groups) or a size 20/.02 file (Laser 3 group). During instrumentation, each canal was irrigated with 3% NaOCl and 17% ethylenediaminetetraacetic acid alternately between the use of successive files. The 4 groups of 10 teeth were processed as follows. In the Control group, teeth were irrigated with 17% ethylenediaminetetraacetic acid, and the irrigant was activated with an ultrasonic device for 60 seconds. In the Laser 1 and Laser 3 groups, the irrigant was activated with the laser for 60 seconds. In the Laser 2 group, the irrigant was activated with the laser for 30 seconds. Results: There were significant differences between the smear layer and debris scores for the Laser 1 group and those for the Control (P < .001), Laser 2 (P = .002), and Laser 3 groups (P = .012 and P = .013, respectively). Completely clean root canals were found in the Laser 1 group. Conclusions: Use of a laser with a plain fiber tip, which produces cavitation in the irrigant, has potential as an improved alternative method for removing of the smear layer from the apical region of a straight root canal. (J Endod 2011;37:1585-1589)