Serafino Cinzia, Gallina Giuseppe, Cumbo Enzo, Monticelli Francesca, Goracci Cecilia, Ferrari Marco
Department of Oral Sciences, University of Palermo, Via del Vespro, Palermo, Italy.
J Endod. 2006 Jun;32(6):549-52. doi: 10.1016/j.joen.2005.07.003. Epub 2006 Apr 4.
The aim of this study was to evaluate the effect of ultrasonic treatment on occlusion of dentine tubules in root canal walls after post space preparation in endodontically treated teeth. Twenty-four premolars were instrumented and filled using warm vertical condensation; after post space preparation, they were divided into two groups. The control group was treated using the etching procedure. The experiment samples were treated with EDTA irrigation and ultrasound activation for 30 s before the etching procedure. The roots were divided and the canal walls were examined under SEM at 1000x magnification. The debris and open tubule marks were observed at 2, 6, and 10 mm levels using a three-step scale and the differences in marks among the groups were tested for statistical significance. The following were observed: (a) A decrease in debris and open tubule marks in the samples treated with ultrasounds and the control group (p < 0.05), (b) no significant differences between the three levels of post space in debris and open tubule marks in the experiment samples, and (c) significant differences between the apical and coronal levels in debris and open tubule marks in the control group.
本研究的目的是评估超声处理对根管治疗后牙齿进行桩道预备后根管壁牙本质小管封闭的影响。选取24颗前磨牙，采用热垂直加压法进行根管预备和充填；桩道预备后，将其分为两组。对照组采用酸蚀处理。实验组在酸蚀处理前先用乙二胺四乙酸（EDTA）冲洗并超声激活30秒。将牙根进行分割，在扫描电子显微镜（SEM）下以1000倍放大率观察根管壁。使用三步量表在2、6和10毫米水平观察碎屑和开放小管痕迹，并对各组痕迹差异进行统计学显著性检验。观察结果如下：（a）超声处理组和对照组样本中的碎屑和开放小管痕迹减少（p < 0.05），（b）实验组桩道三个水平的碎屑和开放小管痕迹之间无显著差异，（c）对照组根尖和冠方水平的碎屑和开放小管痕迹之间存在显著差异。
