J Endod:现行根管器械与下颌磨牙近中根管根尖直径尺寸的匹配情况分析

2019-05-21 lishiting MedSci原创

这篇micor-CT影像研究的目的是为了调查下颌磨牙近中根管根尖部分的原始解剖直径,并与现行以及常用的根管预备器械的尺寸进行匹配。

这篇micor-CT影像研究的目的是为了调查下颌磨牙近中根管根尖部分的原始解剖直径,并与现行以及常用的根管预备器械的尺寸进行匹配。研究对108颗Vertucci type IV结构的下颌磨牙近中根进行micro-CT扫描,并检测到双近颊根管解剖最大直径位于根尖孔冠方的1, 2, 3和4 mm处。将根管直径与10种牙髓器械尺寸相比较以模拟预备距根尖孔1 mm处的位置。相应的,在特定或大于根尖4-mm部分的位置,将器械直径大于最大根管直径认定为潜在需要100%预备根管壁。结果显示,在距离根尖孔1和2 mm处,45/.02号器械直径显著大于近颊根管直径的比例分别为73%和55%。近舌根管也出现一致的结果,分别为65%和55%。当考虑整个根尖4-mm的部分时,40/.06号器械结果更好,大于样本尖端根管的20%。总的来说,78%的尖端根管不会被任何器械完全预备。基于平均解剖直径,适合于近颊根管的器械尺寸为40/.10 (40/.08),近舌根管为45/.08 (40/.09)。结论:现行根管预备器械的尺寸不能满足大多数病例中根尖部分的完全预备。理想的可完全预备尖端根管壁的器械型号/锥度过大,对

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    2019-11-05 xlysu
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    2019-05-23 kksonne
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    2019-05-22 深海的鱼

    学习学习学习

    0

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