Yazdi Kazem Ashofteh, Aminsobhani Mohsen, Alemi Parvin
Department of Endodontic, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.
Department of Endodontic, School of Dentistry, AJA University of Medical Sciences, Tehran, Iran.
Eur Endod J. 2018 Dec 13;4(1):21-27. doi: 10.14744/eej.2018.13008. eCollection 2019.
This ex vivo study aims to investigate the root filling quality of warm vertical technique, single-cone technique with GuttaFlow2, Endoseal MTA and EndoSequence BC sealer as a sealer in artificial internal resorption cavity.
For this study, 40 human single-root teeth were selected. After root preparation, the roots were horizontally sectioned 7 mm from the apex. The hemisphere cavities were created on both sides, and then they were re-approximated. According to filling methods and materials, the samples were randomly as-signed to four experimental groups: I: warm vertical compaction technique (WVC), II: single-cone technique with GuttaFlow2 (GF), III: single-cone technique with Endoseal MTA sealer (EM), IV: single-cone technique with EndoSequence BC sealer (ES). Filled roots were radiographed in buccolingual and mesiodistal views to check the obturation, and stored in humid environment at the room temperature for 7 days. Each tooth was sectioned 7 mm from the root apex at the level of the previous cut, and it was then photographed un-der stereomicroscope. The photographs and radiographs of all samples were imported to an image-analysis software to calculate the percentage of sealer, gutta-percha, and voids. The results were statistically analyzed using one-way ANOVA and Kruskal-Wallis Dunn's tests.
In buccolingual view of radiographs, the WVC and EM groups showed significantly lower percent-age of voids (P value<0.05) compared to that in the GF group. In mesiodistal view, the WVC and EM groups showed significantly lower percentage of voids (P value<0.05) compared to that in the GF and ES groups. In stereomicroscope evaluation, the WVC and EM groups showed significantly lower percentage of voids (P value<0.05) compared to that in the GF and ES groups. The differences observed between the WVC and EM groups (P value>0.05) or between the GF and ES groups (P value>0.05) were not significant.
WVC technique and single-cone technique with EM sealer are the optimum methods to fill ar-tificial resorption cavities.
本体外研究旨在调查热垂直加压技术、使用GuttaFlow2的单尖法、Endoseal MTA和EndoSequence BC封闭剂作为封闭剂在人工内吸收腔中的根充质量。
本研究选取40颗人单根牙。根管预备后，在距根尖7mm处水平切断牙根。在两侧制备半球形腔，然后将它们重新对接。根据充填方法和材料，将样本随机分为四个实验组：I：热垂直加压技术（WVC），II：使用GuttaFlow2的单尖法（GF），III：使用Endoseal MTA封闭剂的单尖法（EM），IV：使用EndoSequence BC封闭剂的单尖法（ES）。对充填后的牙根进行颊舌向和近远中向X线片拍摄以检查充填情况，并在室温潮湿环境中保存7天。在先前切割的水平，从根尖7mm处将每颗牙齿切断，然后在体视显微镜下拍照。将所有样本的照片和X线片导入图像分析软件，以计算封闭剂、牙胶和空隙的百分比。使用单因素方差分析和Kruskal-Wallis Dunn检验对结果进行统计学分析。
在X线片的颊舌向视图中，与GF组相比，WVC组和EM组的空隙百分比显著更低（P值<0.05）。在近远中向视图中，与GF组和ES组相比，WVC组和EM组的空隙百分比显著更低（P值<0.05）。在体视显微镜评估中，与GF组和ES组相比，WVC组和EM组的空隙百分比显著更低（P值<0.05）。WVC组和EM组之间（P值>0.05）或GF组和ES组之间（P值>0.05）观察到的差异不显著。
WVC技术和使用EM封闭剂的单尖法是充填人工吸收腔的最佳方法。
