J Endod:残余物质是否会影响根管封闭剂的流变性?

2019-12-13 lishiting MedSci原创

这篇研究的目的是为了评估来源于冲洗液和根管内封药的残余物质是否会影响含硅酮、牙胶和生物活性玻璃类根管封闭剂的流变性,并与树脂类封闭剂相比较。

这篇研究的目的是为了评估来源于冲洗液和根管内封药的残余物质是否会影响含硅酮、牙胶和生物活性玻璃类根管封闭剂的流变性,并与树脂类封闭剂相比较。

研究将含有残余污染物的薄片(0.5 μL) (3%次氯酸钠[NaOCl], 氯己定[CHX], 17% EDTA, 氢氧化钙, 40%柠檬酸或去离子水[DW])与GuttaFlow Bioseal (GFB; Coltene/Whaledent, Langenau, Germany)或AH Plus Jet (Dentsply DeTrey, Konstanz, Germany)相混合至于动态流变仪的下层托盘内。流变性的检测在应变幅、角频率和恒温分别为0.01%, 10 rad/s和37°C的参数下在摆动模式下完成。未含残余物的样本为对照组。所有测试重复5次。采用Kolmogorov-Smirnov检验和1-way analysis of variance以及Student-Newman-Keuls检验对结果进行统计学分析(P < .05)。

结果显示,与对照组相比,残余污染物并未改变GFB的固化时间;但是,CHX与氢氧化钙明显减弱了材料的复形粘性(ƞ*) (P < .05)。DW, CHX, citric acid和EDTA显著增加了AH Plus Jet的固化时间(P < .05)。所有残余物在固化点均明显减弱材料的ƞ* (P < .05)。NaOCl对于材料流变性参数的影响最为显著。

结论:除了DW和3% NaOCl,冲洗液和根管内封药呈相反的趋势影响着至少1种所测试的2种封闭剂的流变性。DW和3% NaOCl并未改变GFB的任何流变性。

原始出处:

de Freitas JV, Ebert J, et al. Do Contaminating Substances Influence the Rheological Properties of Root Canal Sealers? J Endod. 2019 Dec 5. pii: S0099-2399(19)30839-8. doi: 10.1016/j.joen.2019.10.030.

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    2019-12-15 huangdf
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