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J Endod:氧化锌抑制white MTA Angelus引起的牙齿变色研究

2017-04-26 lishiting MedSci原创

这篇研究是为了评估添加不同含量的氧化锌对MTA Angelus引起的牙齿变色的抑制作用。

这篇研究是为了评估添加不同含量的氧化锌对MTA Angelus引起的牙齿变色的抑制作用。

MTA按照不同比重添加氧化锌(ZnO):5%、15%和45%,并与MTA Angelus相比较测试。所构成的凝结物通过扫描电镜、能量色散光谱和X射线衍射进行联合观察。阻射性和固化时间按照美国国家标准学会/美国牙医协会(57/2012)和美国测试和材料学会(C266-08)的标准进行检测。使用micro-CT检测材料的体积变化。pH值和钙离子释放分别在3 h、24 h和28天后进行检测。由材料所导致的牙齿变色分别在24 h、28天和90天后进行检测。大鼠皮下埋植实验检测材料的生物相容性,分别在术后30天和60天取材、观察。

结果显示,与MTA Angelus相比,添加ZnO的MTA其阻射性、凝固时间、体积、pH值和生物相容性均未受到影响(P > .05)。而添加ZnO后的MTA钙离子释放明显增加(P < .05)。另外,按照15%和45%比例添加ZnO的MTA其水合作用受到明显干扰。因此,添加5%的ZnO足够预防MTA造成的牙齿变色。

结论:向MTA Angelus添加5%、15%和45%的ZnO均可以避免MTA引起的牙齿变色。同时,并不影响材料的阻射性、凝固时间、体积、pH值和生物相容性。

原始出处:

Marciano MA, Camilleri J, et al. Zinc Oxide Inhibits Dental Discoloration Caused by White Mineral Trioxide Aggregate Angelus. J Endod. 2017 Apr 14. pii: S0099-2399(17)30112-7. doi: 10.1016/j.joen.2017.01.029.

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    2018-02-26 yuandd
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    2017-04-27 liuxiaona
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    2017-04-27 zhouqu_8

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