Abbaszadegan Abbas, Ghahramani Yasamin, Farshad Melika, Sedigh-Shams Mehdi, Gholami Ahmad, Jamshidzadeh Akram
Department of Endodontics, Dental School, Shiraz University of Medical Sciences, Shiraz, Iran.
Iran Endod J. 2019 Winter;14(1):23-27. doi: 10.22037/iej.v14i1.21758.
The aim of this study was to evaluate dynamic viscosity, surface tension and dentin wettability of a newly introduced imidazolium-based silver nanoparticle solution (Im AgNP) in comparison with three common root canal irrigants.
The irrigants were Im AgNPs at 5.7×10 mol/L, 5.25% Sodium hypochlorite (NaOCl), 2% Chlorhexidine (CHX) and 17% Ethylenediaminetetraacetic acid (EDTA) and distilled water (control group). Dynamic viscosity was measured using rotational digital viscometer at 25, 37, 45 and 60C. Surface tension was evaluated using dynamic contact angle analyzer at room temperature (25C). Wettability was assessed by contact angle measurement for five groups of 10 dentin samples after each group was treated in each irrigant for 10 min. One-way ANOVA, and post hoc Tukey's test were used for statistical analysis. Significance was set at <0.05.
Dynamic viscosity of all irrigants decreased as the temperature increased. 17% EDTA was the most viscous solution in all examined temperatures (<0.05). Viscosity of Im AgNP solution at 25, 37 and 45C was significantly lower than that of 17% EDTA and 5.25% NaOCl (<0.05). Im AgNPs exhibited a higher surface tension than other irrigants except distilled water. The wettability of dentin increased when it was in contact with 2% CHX and 5.25% NaOCl while Im AgNPs decreased the wettability of dentin surfaces (<0.05).
Im AgNP irrigant has the potential to reach apical portions of root canals due to its lower viscosity compared to the other tested irrigants. However, it may not bring better penetration inside dentinal tubules because of its higher surface tension. Furthermore, Im AgNPs can influence physiochemical properties of dentin by decreasing its surface wettability.
本研究旨在评估一种新引入的基于咪唑鎓的银纳米颗粒溶液（Im AgNP）与三种常用根管冲洗剂相比的动态粘度、表面张力和牙本质润湿性。
冲洗剂包括5.7×10摩尔/升的Im AgNP、5.25%次氯酸钠（NaOCl）、2%氯己定（CHX）、17%乙二胺四乙酸（EDTA）和蒸馏水（对照组）。使用旋转数字粘度计在25、37、45和60℃下测量动态粘度。使用动态接触角分析仪在室温（25℃）下评估表面张力。对五组每组10个牙本质样本在每种冲洗剂中处理10分钟后，通过测量接触角来评估润湿性。采用单因素方差分析和事后Tukey检验进行统计分析。显著性设定为<0.05。
所有冲洗剂的动态粘度均随温度升高而降低。在所有检测温度下，17% EDTA是粘度最高的溶液（<0.05）。Im AgNP溶液在25、37和45℃时的粘度显著低于17% EDTA和5.25% NaOCl（<0.05）。除蒸馏水外，Im AgNP的表面张力高于其他冲洗剂。当牙本质与2% CHX和5.25% NaOCl接触时，其润湿性增加，而Im AgNP降低了牙本质表面的润湿性（<0.05）。
与其他测试冲洗剂相比，Im AgNP冲洗剂因其较低的粘度而有可能到达根管根尖部分。然而，由于其较高的表面张力，它可能无法在牙本质小管内实现更好的渗透。此外，Im AgNP可通过降低牙本质表面润湿性来影响其物理化学性质。
