Dotto Maria Eduarda Paz, Savaris Julia Menezes, de Lima Carolina Oliveira, da Silva Emmanuel João Nogueira Leal, da Fonseca Roberti Garcia Lucas, Bortoluzzi Eduardo Antunes, da Silveira Teixeira Cleonice
Department of Dentistry, Endodontics Division, Health Sciences Center, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Florianópolis , Santa Catarina, Brazil.
Department of Dentistry, Federal University of Juiz de Fora, Minas Gerais, Brazil.
Odontology. 2025 Apr;113(2):675-684. doi: 10.1007/s10266-024-01005-0. Epub 2024 Sep 16.
This study evaluated the influence of the apical limit and the diameter of the instrumentation on the extrusion of the irrigating solution. Sixty human lower premolars were distributed into 5 groups according to the apical limit and diameter of the root canal instrumentation (n = 12): (G-1) R40 instrument 1 mm above the tooth length (TL) (Control); (G-1) R50 instrument 1 mm above the TL; (GF) R25 instrument at the TL; (GF) R40 instrument at the root canal length and (GF) R50 instrument at the TL. A space of 33.5 ± 1 mm was created for storage of the extruded solution. Omnipaque contrast was added to the NaOCl solution in a 1:2 ratio, totaling 15 mL of solution to allow its visualization when extruded in microcomputed tomography. Final irrigation was performed with a syringe and needle and activated with a passive ultrasonic irrigation (PUI). Three activation cycles were performed. Data were tabulated and statistically analyzed (one-way ANOVA) with a significance level set at 5%. It was observed irrigating solution extrusion after final irrigation in all groups. However, there were no statistically significant differences among experimental groups, regardless of the diameter or apical limit of root canal instrumentation (p > 0.05). The different apical limits and diameters of root canal instrumentation did not influence the volume of extruded irrigating solution using passive ultrasonic irrigation.
本研究评估了根尖界限和根管预备直径对冲洗液挤出的影响。根据根管预备的根尖界限和直径，将60颗人下颌前磨牙分为5组（每组n = 12）：（G-1）R40器械超出牙长（TL）1 mm（对照组）；（G-2）R50器械超出TL 1 mm；（GF）R25器械于TL处；（GF）R40器械于根管长度处以及（GF）R50器械于TL处。创建了一个33.5 ± 1 mm的空间用于储存挤出的溶液。将欧乃派克造影剂按1:2的比例添加到次氯酸钠溶液中，溶液总量为15 mL，以便在微计算机断层扫描中挤出时能够观察到。最后用注射器和针头进行冲洗，并用被动超声冲洗（PUI）激活。进行三个激活周期。将数据制成表格并进行统计分析（单因素方差分析），显著性水平设定为5%。在所有组的最终冲洗后均观察到冲洗液挤出。然而，无论根管预备的直径或根尖界限如何，各实验组之间均无统计学显著差异（p > 0.05）。根管预备不同的根尖界限和直径并未影响使用被动超声冲洗时挤出的冲洗液体积。
