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首页> 外文期刊>Journal of Lasers in Medical Sciences >In Vitro Effect of Bleaching With 810 nm and 980 nm Diode Laser on Microhardness of Self-cure and Light-Cure Glass Ionomer Cements
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In Vitro Effect of Bleaching With 810 nm and 980 nm Diode Laser on Microhardness of Self-cure and Light-Cure Glass Ionomer Cements

机译：810 nm和980 nm二极管激光器漂白对自固化和光固化玻璃离聚物水泥的显微硬度的体外影响

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Introduction : This study sought to assess the effect of bleaching combined with irradiation of 810 nm and 980 nm diode laser on microhardness of 2 commonly used self-cure and light-cure glass ionomer cements (GICs) in comparison with conventional bleaching (without laser). Methods : In this in vitro, experimental study, 60 samples were fabricated of A2 shade of Fuji IX and Fuji II LC GICs (n = 30) and each group was divided into 3 subgroups (n = 10). The first subgroups were subjected to bleaching with Opalescence Xtra Boost plus 980 nm diode laser irradiation. The second subgroups were subjected to bleaching with Opalescence Boost plus 810 nm diode laser irradiation and the third subgroups were subjected to bleaching with Opalescence Xtra Boost without laser. Microhardness was measured at baseline and after the intervention using Vickers hardness tester. The data were analyzed using two-way analysis of variance (ANOVA) (P & 0.05). Results : Microhardness decreased in all subgroups after the intervention (P & 0.001) irrespective of the type of GIC (P = 0.201) or surface treatment (P = 0.570). The baseline microhardness of the three subgroups within each group of GIC was not significantly different (P = 0.456), but the baseline microhardness of conventional GIC was significantly higher than that of resin modified GIC (P = 0.004). Conclusion : Bleaching with/without laser irradiation decreases the microhardness of GICs. The baseline microhardness of conventional GIC is higher than that of resin modified GIC.
机译：简介：本研究旨在评估与传统漂白法（不使用激光）相比，漂白法与810 nm和980 nm二极管激光照射相结合对2种常用的自固化和光固化玻璃离聚物水泥（GIC）的显微硬度的影响。 。方法：在这项体外实验研究中，从Fuji IX和Fuji II LC GIC的A2阴影（n = 30）制作了60个样品，并将每组分为3个亚组（n = 10）。使用Opalescence Xtra Boost加980 nm二极管激光辐照对第一亚组进行漂白。第二小组使用Opalescence Boost加810 nm二极管激光辐照进行漂白，第三小组使用Opalescence Xtra Boost进行无激光漂白。在基线和干预后使用维氏硬度计测量显微硬度。使用双向方差分析（ANOVA）分析数据（P ＜0.05）。结果：干预后所有亚组的显微硬度均降低（P ＜0.001），而与GIC的类型（P ＝ 0.201）或表面处理（P ＝ 0.570）无关。每组GIC中的三个亚组的基线显微硬度没有显着差异（P = 0.456），但是常规GIC的基线显微硬度显着高于树脂改性的GIC（P = 0.004）。结论：有/无激光照射漂白会降低GIC的显微硬度。常规GIC的基线显微硬度高于树脂改性的GIC。

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