J Endod：MTA根尖充填厚度对未发育完成牙齿抗断裂性的影响

2017-07-29 MedSci MedSci原创

这篇研究的目的是在模拟未发育完成的牙齿内根尖充填不同厚度的MTA，比较其抗断裂性差异。

这篇研究的目的是在模拟未发育完成的牙齿内根尖充填不同厚度的MTA，比较其抗断裂性差异。

研究选取52颗上颌前牙作为实验对象。5颗牙齿作为阳性对照组；使用P钻进行预备来模拟未发育完成牙齿，但不进行开髓处理。47颗牙齿实施开髓处理，P钻预备根管。其中的5颗牙齿作为阴性对照；氢氧化钙充填根管。另42颗牙齿分为3组：组1、组2和组3使用MTA分别根尖充填3-mm、6-mm和根管全长。组1和组2根管的剩余部分以牙胶和AH Plus (Dentsply DeTrey， Konstanz， Germany)进行充填。待根充材料彻底固化后，用聚醚橡胶印模材料包裹牙根，并埋植入自凝树脂块中。随后，使用通用测试机对每个样本进行抗断裂性测试。数据通过1-way方差分析和Tukey post hoc检验进行多重比较。

结果显示，在所有组中，阴性对照组表现出最差的抗断裂性能力。根尖充填3-mm组抗断裂性能力最佳 (P < .05)。而根尖充填3-mm和6-mm组之间未见明显差异(P > .05)。

结论：根尖的充填应使用MTA代替根管充填材料，以此增加未发育完成牙齿的抗断裂性能力。

原始出处：

Çiçek E， Yılmaz N， et al. Effect of Mineral Trioxide Aggregate Apical Plug Thickness on Fracture Resistance of Immature Teeth. J Endod. 2017 Jul 20. pii： S0099-2399(17)30583-6. doi： 10.1016/j.joen.2017.05.007.

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#插入话题

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2017-07-31 neurowu

#发育#

26 0
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2017-07-31 liuxiaona

#MTA#

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2017-07-31 zhouqu_8

#牙齿#

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2017-07-31 方舒

学习

70 0
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2017-07-30 184****9840

学习了受益匪浅

59 0
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2017-07-29 1e1a50a1m36(暂无匿称)

谢谢分享

57 0

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