Department of Dentistry, Catholic University of the Sacred Heart, Rome, Italy.
Int Endod J. 2011 Apr;44(4):362-9. doi: 10.1111/j.1365-2591.2010.01840.x. Epub 2011 Jan 24.
To evaluate ex vivo the quality of root fillings completed by two thermoplasticized gutta-percha techniques (Thermafil and System B) and a cold gutta-percha technique (single point) by μCT analysis.
A total of 30 freshly extracted human single-rooted permanent teeth were selected. Root canals were prepared with ProTaper Universal instruments and then randomly divided into three groups (n = 10) depending on the filling technique. In group 1, canals were filled with a single-point technique; group 2 was filled with Thermafil; in group 3 System B was used. In group 1 and group 3, the root filling was performed using ProTaper Universal gutta-percha points, in group 2 Thermafil obturators were used; AH-Plus sealer was used in all groups. Assessment of the root filling was carried out by μCT, using a desktop X-ray micro focus CT scanner. Percentage of root canal filling materials and voids was calculated for each specimen. Data were statistically analysed using Kruskal-Wallis test (P < 0.05).
Mean percentages of filling materials were 98.379 ± 1.204 in the single-point group, 99.023 ± 1.457 in Thermafil group, and 98.167 ± 3.432 in System B group. No statistically significant difference was found amongst the groups.
All techniques produced comparable results in terms of percentage of filling and void distribution.
通过 μCT 分析评价两种热塑牙胶（Thermafil 和 System B）和一种冷牙胶（单点）技术的根管充填质量。
共选择 30 颗新鲜拔出的人单根恒牙。根管使用 ProTaper Universal 器械预备，然后根据充填技术随机分为三组（每组 10 颗牙）。在第 1 组中，使用单点技术进行根管充填；第 2 组使用 Thermafil；第 3 组使用 System B。在第 1 组和第 3 组中，使用 ProTaper Universal 牙胶尖进行根管充填，在第 2 组中使用 Thermafil 牙胶充填器；所有组均使用 AH-Plus 密封剂。使用台式 X 射线微焦点 CT 扫描仪对根管充填进行 μCT 评估。计算每个样本的根管充填材料和空隙的百分比。使用 Kruskal-Wallis 检验对数据进行统计学分析（P<0.05）。
单点组的充填材料平均百分比为 98.379 ± 1.204，Thermafil 组为 99.023 ± 1.457，System B 组为 98.167 ± 3.432。组间无统计学差异。
在充填百分比和空隙分布方面，所有技术的结果均相似。
