Lin Ping-Hung, Lin Dan-Jae, Huang Heng-Li, Hsu Jui-Ting, Tu Ming-Gene
School of Dentistry, China Medical University, Taichung, Taiwan.
Department of Biomedical Engineering, China Medical University, Taichung, Taiwan.
J Dent Sci. 2023 Jul;18(3):1258-1263. doi: 10.1016/j.jds.2023.02.016. Epub 2023 Mar 1.
BACKGROUND/PURPOSE: Sealing ability in root canal obturation has always been a key concern for endodontic success. The purpose of this study was to analyze the percentage of voids in root canal space obturated by using single cone hydraulic condensation with different root canal sealers and to compare those with AH Plus sealer.
Experiments were conducted using twenty 3D-printed upper first premolars. After the buccal root canals were prepared using Ni-Ti rotary instruments, the teeth were divided into four groups: the AH Plus, BC sealer, BC sealer HiFlow, and Endoseal MTA groups. All buccal canals were obturated by single-cone hydraulic condensation. All specimens were scanned using micro-computed tomography and the percentage volume of the voids inside and outside the filled materials (V and V) at three different canal depth intervals were calculated by a Bruker micro-CT software. Differences according to root canal sealers were evaluated statistically using the Kruskal-Wallis test and the Wilcoxon Rank Sum test at a significance level of 0.05.
The results indicated that most of the voids were presented near the interface (V), the V is very small and not significant different between groups. The V decreased in the following order: AH Plus(1.837% ± 1.226%)≅BC sealer (1.225% ± 0.836%)>BC sealer Hiflow(0.349% ± 0.071%)>Endoseal MTA(0.203% ± 0.049%).
For the percentage volume of voids between the root canal filling material and root canal surface, though the BC sealer Hiflow is slightly larger than Endoseal MTA, which is still much less than BC sealer and AH Plus.
背景/目的：根管充填的封闭能力一直是牙髓治疗成功的关键因素。本研究的目的是分析使用不同根管封闭剂进行单锥液压加压充填后根管空间内的空隙百分比，并与AH Plus封闭剂进行比较。
使用20颗3D打印的上颌第一前磨牙进行实验。使用镍钛旋转器械预备颊侧根管后，将牙齿分为四组：AH Plus组、BC封闭剂组、BC封闭剂HiFlow组和Endoseal MTA组。所有颊侧根管均采用单锥液压加压充填。所有标本均使用微型计算机断层扫描进行扫描，并通过布鲁克微型CT软件计算在三个不同根管深度区间内充填材料内外空隙的体积百分比（V和V）。使用Kruskal-Wallis检验和Wilcoxon秩和检验对不同根管封闭剂的差异进行统计学评估，显著性水平为0.05。
结果表明，大多数空隙出现在界面附近（V），V非常小，组间差异不显著。V按以下顺序降低：AH Plus（1.837% ± 1.226%）≅BC封闭剂（1.225% ± 0.836%）>BC封闭剂HiFlow（0.349% ± 0.071%）>Endoseal MTA（0.203% ± 0.049%）。
对于根管充填材料与根管壁之间空隙的体积百分比，尽管BC封闭剂HiFlow略大于Endoseal MTA，但仍远小于BC封闭剂和AH Plus。
