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首页> 外文期刊>Journal of dentistry >Non-thermal atmospheric plasmas in dental restoration: Improved resin adhesive penetration
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Non-thermal atmospheric plasmas in dental restoration: Improved resin adhesive penetration

机译：牙齿修复中的非热大气等离子体：改进的树脂粘合剂渗透性

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Objective To investigate the influence of non-thermal plasma treatment on the penetration of a model dental adhesive into the demineralized dentine. Methods Prepared dentine surfaces were conditioned with Scotchbond Universal etchant for 15 s and sectioned equally perpendicular to the etched surfaces. The separated halves were randomly selected for treatment with an argon plasma brush (input current 6 mA, treatment time 30 s) or gentle argon air blowing (treatment time 30 s, as control). The plasma-treated specimens and control specimens were applied with a model adhesive containing 2,2-bis[4-(2-hydroxy-3- methacryloxypropoxy) phenyl]-propane (BisGMA) and 2-hydroxyethyl methacrylate (HEMA) (mass ratio of 30/70), gently air-dried for 5 s, and light-cured for 20 s. Cross-sectional specimens were characterized using micro-Raman spectral mapping across the dentine, adhesive/dentine interface, and adhesive layer at 1-μm spatial resolution. SEM was also employed to examine the adhesive/dentine interfacial morphology. Results The micro-Raman result disclosed that plasma treatment significantly improved the penetration of the adhesive, evidenced by the apparently higher content of the adhesive at the adhesive/dentine interface as compared to the control. Specifically, the improvement of the adhesive penetration using plasma technique was achieved by dramatically enhancing the penetration of hydrophilic monomer (HEMA), while maintaining the penetration of hydrophobic monomer (BisGMA). Morphological observation at the adhesive/dentine interface using SEM also confirmed the improved adhesive penetration. The results further suggested that plasma treatment could benefit polymerization of the adhesive, especially in the interface region. Conclusion The significant role of the non-thermal plasma brush in improving the adhesive penetration into demineralized dentine has been demonstrated. The results obtained may offer a better prospect of using plasma in dental restoration to optimize adhesion between tooth substrate and restorative materials.
机译：目的研究非热等离子体处理对模型牙科胶粘剂渗入脱矿质牙本质的影响。方法用Scotchbond Universal蚀刻剂将准备好的牙质表面修整15 s，并垂直于被蚀刻的表面等分。随机选择分开的两半，用氩气等离子刷（输入电流6 mA，处理时间30 s）或轻柔的吹氩气（处理时间30 s，作为对照）进行处理。等离子体处理过的样品和对照样品上涂有包含2,2-双[4-（2-羟基-3-甲基丙烯酰氧基丙氧基）苯基]丙烷（BisGMA）和甲基丙烯酸2-羟乙酯（HEMA）的模型粘合剂30/70），轻轻风干5秒钟，然后光固化20秒钟。使用微拉曼光谱图在牙本质，粘合剂/牙本质界面和粘合剂层上以1μm的空间分辨率对横截面样品进行表征。 SEM还用于检查粘合剂/牙本质界面形态。结果显微拉曼结果显示，等离子体处理显着改善了粘合剂的渗透性，这是由与对照相比在粘合剂/牙本质界面上的粘合剂含量明显更高所证明的。具体而言，通过显着提高亲水性单体（HEMA）的渗透性，同时保持疏水性单体（BisGMA）的渗透性，可以提高使用等离子体技术的粘合剂渗透性。使用SEM在粘合剂/牙本质界面的形态学观察也证实了改进的粘合剂渗透性。结果进一步表明，等离子体处理可以有益于粘合剂的聚合，特别是在界面区域。结论已经证明了非热等离子体刷在提高粘合剂渗透到软化牙本质中的重要作用。获得的结果可能为在牙科修复中使用血浆以优化牙基质与修复材料之间的附着力提供更好的前景。

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