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J Endod：光固化复合树脂套管技术取出根管内折断器械的影响因素分析

2020-02-16 lishiting MedSci原创

套管技术断针
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这篇研究的目的是为了评估聚合循环次数与折断器械表面预备过程对应用光固化复合树脂改良型套管技术的根管内折断器械粘附作用的影响。

这篇研究的目的是为了评估聚合循环次数与折断器械表面预备过程对应用光固化复合树脂改良型套管技术的根管内折断器械粘附作用的影响。研究将80颗Mtwo器械(size 15.05； VDW， Munich， Germany)在直径为35/100 mm处截断，并使用夹钳夹持断端2 mm。采用SDR composite (Dentsply， York， PA)充填相匹配的套管并置于断针上。采用Prime & Bond Active (Dentsply Sirona， Bensheim， Germany)作为粘接材料。将玻璃纤维从套管另一端插入套管内，聚合循环数量分别为1， 2， 4或6次，每次30秒(800 mW/mm2) (n = 20/group)。另外60根器械分为以下各组(n = 20/group)：组1，在10 mm处截断并且刃端未进行表面预备(taper = 5%)；组2，采用金刚砂车针平行预备断针刃端(taper = 0%)；组3，断针刃端进行反向锥形预备(taper = 2%)。采用拉伸测试仪检测负载失败和失败模式。采用Kruskal-Wallis或chi-square检验

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    2020-02-18 chenzhuanggui

    #影响因素#

    0

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    2020-02-18 guozhenyu

    #复合树脂#

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    2020-02-18 zhaozhouchifen

    #根管#

    0

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    2020-02-18 chenshujs

    #树脂#

    0