School of Dentistry, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea.
Department of Aerospace Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, Republic of Korea.
Sci Rep. 2023 Nov 9;13(1):19447. doi: 10.1038/s41598-023-46683-y.
This study aimed to evaluate the efficacy of a novel jet dispenser (JD) for filling simulated straight and curved canals with calcium hydroxide (Ca(OH)) paste by comparing the level of intracanal medicament with traditional direct syringe delivery. The Ca(OH) paste was delivered into the canals using either a direct syringe with binding tip and unbinding tip or a JD. The analysis of the ratio of the canal filled area (RCFA) in the coronal, middle, and apical thirds was conducted using the Kruskal-Wallis and Mann-Whitney U tests (α = 0.05). The JD resulted in a significantly higher RCFA of 1.00 in the middle and apical thirds in both the straight and curved canals than the direct syringe method (p < 0.001). Voids were frequently observed in the direct syringe group, whereas JD showed no voids within the filled area. In the direct syringe groups, the apical area was more readily filled in both canal types when the tip was bound (p < 0.001). The JD was found to be more effective in filling the entire canal space than the binding and unbinding conditions of the direct injection method, particularly in the apical area.
本研究旨在通过比较传统直接注射器输送和新型喷射式分配器（JD）在模拟直弯根管中输送氢氧化钙（Ca(OH))糊剂的根管内药物水平，评估新型喷射式分配器在填充中的效果。使用带有绑定尖端和非绑定尖端的直接注射器或 JD 将 Ca(OH)糊剂输送到根管中。使用 Kruskal-Wallis 和 Mann-Whitney U 检验（α=0.05）分析根管填充面积（RCFA）在冠、中、根尖三分之一处的比例。结果表明，在直弯根管的中、根尖三分之一处，JD 组的 RCFA 均显著高于直接注射器组（p<0.001），达到 1.00。直接注射器组中经常观察到空隙，而 JD 组在填充区域内没有空隙。在直接注射器组中，当尖端绑定时，两种根管类型的根尖区域更容易填充（p<0.001）。与直接注射方法的绑定和非绑定条件相比，JD 更有效地填充整个根管空间，尤其是在根尖区域。
