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Influence of silver nanoparticle solution on the mechanical properties of resin cements and intrarradicular dentin

机译：纳米银溶液对树脂胶粘剂和根管内牙本质的力学性能的影响

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This study evaluated the influence of silver nanoparticle on mechanical properties of the components of underlying dentin and resin cement in different regions of intraradicular dentin. Ninety extracted single-rooted human teeth were used in this study. After endodontic preparation, the teeth were divided into five groups, according to the irrigating agents: distilled water, 5.25% sodium hypochlorite, 25% polyacrylic acid, 2% chlorhexidine and 23 ppm silver nanoparticles dispersion. Then, the groups were divided in 3 subgroups (n = 6) according to the technique adopted for adhesive cementation: SUA group: Scotchbond Universal Adhesive + RelyX ARC; U200 group: RelyX U200; and MCE group: MaxCem Elite. The mechanical properties of hardness and elastic modulus were measured in resin cement and underlying dentin in ultra-micro hardness tester in different thirds of radicular dentin surface. Data were subjected to ANOVA and Fisher’s test (p = 0.05). In the underlying dentin, in general, there was no statistically significant difference in different thirds of intraradicular dentin according to the different solutions used. In the resin cements, higher hardness values were found, in general, for the cervical third. When silver nanoparticle solution was used, higher mechanical properties were generally obtained for resin cement for the SBU and U200 groups, with little or no changes in mechanical properties for the dentin. Silver nanoparticle application is a viable option for irrigation the intraradicular dentin previously through the cementation process of glass fiber posts. The mechanical properties are influenced by irrigant solutions used and the depth intraradical analyzed area.
机译：这项研究评估了银纳米颗粒对牙本质内牙本质不同区域中基础牙本质和树脂粘固剂的机械性能的影响。在这项研究中使用了九十颗拔出的单根人牙。根管治疗后，根据冲洗剂将牙齿分为五组：蒸馏水，5.25％的次氯酸钠，25％的聚丙烯酸，2％的洗必太和23 ppm的纳米银分散液。然后，根据粘合剂胶凝技术将这些组分为3个子组（n = 6）：SUA组：Scotchbond Universal Adhesive + RelyX ARC； U200组：RelyX U200；和MCE组：MaxCem Elite。在放射状牙本质表面的三分之二处，在超微硬度测试仪中测量树脂水泥和底层牙本质中的硬度和弹性模量的机械性能。数据经过ANOVA和Fisher检验（p = 0.05）。通常，根据所使用的不同溶液，在基础牙本质中，放射状内牙本质的三分之二没有统计学上的显着差异。通常，在树脂胶粘剂中，对于宫颈第三种，硬度值较高。当使用银纳米颗粒溶液时，对于SBU和U200基团的树脂水泥，通常获得较高的机械性能，而牙本质的机械性能几乎没有变化。银纳米颗粒的应用是事先通过玻璃纤维桩的胶结过程冲洗放射内牙本质的可行选择。力学性能受所用灌溉溶液和深度自由基分析区域的影响。

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