Marciano Marina Angélica, Bramante Clovis Monteiro, Duarte Marco Antonio Hungaro, Delgado Ronan Jacques Rezende, Ordinola-Zapata Ronald, Garcia Roberto Brandão
Department of Operative Dentistry, Endodontics and Dental Materials, Bauru Dental School, University of São Paulo, Bauru, SP, Brazil.
Braz Dent J. 2010;21(5):411-5. doi: 10.1590/s0103-64402010000500006.
The aim of this study was to determine the percentage of voids, gutta-percha and root canal sealer using 4 different filling techniques. Fifty-two extracted maxillary lateral incisors were prepared using the crown-down pressureless technique. The teeth were randomly divided in 4 groups (n=13): Lateral compaction (LC), Tagger's hybrid (TH), MicroSeal (MS) and GuttaFlow (GF) techniques. Horizontal cross-sections were made at the 2, 10 and 15 mm levels from the apex. Digital images of the root canal areas were acquired using a stereomicroscope and examined using the Image Tool 3.0 software. Statistical analysis was performed using the Kruskal-Wallis test (α=0.05). In general, a significant decrease in the gutta-percha filled area and increase of sealer area were observed at the apical level for all the evaluated techniques (p<0.05). With regard to the presence of voids, no significant difference was found. MS and TH techniques showed a larger gutta-percha filled area than LC and GF techniques at the coronal and middle third level (p<0.05). From the results of the present study, it may be concluded that the gutta-percha filled area of fillings decrease at the apical level, regardless of the filling technique used.
本研究的目的是使用4种不同的充填技术来确定根管内空隙、牙胶和根管封闭剂的百分比。采用冠向下无压力技术对52颗拔除的上颌侧切牙进行预备。将牙齿随机分为4组（n = 13）：侧向加压（LC）、Tagger混合（TH）、MicroSeal（MS）和GuttaFlow（GF）技术组。在距根尖2、10和15 mm水平制作横切面。使用体视显微镜获取根管区域的数字图像，并使用Image Tool 3.0软件进行检查。采用Kruskal-Wallis检验进行统计分析（α = 0.05）。总体而言，对于所有评估技术，在根尖水平观察到牙胶充填面积显著减少，封闭剂面积增加（p < 0.05）。关于空隙的存在，未发现显著差异。在冠部和中三分之一水平，MS和TH技术显示出比LC和GF技术更大的牙胶充填面积（p < 0.05）。从本研究结果可以得出结论，无论使用何种充填技术，充填物的牙胶充填面积在根尖水平都会减少。
