J Endod:Micro-CT评估中国人恒牙副根管的流行性、分布和形态特征

2019-07-01 lishiting MedSci原创

这篇研究的目的是通过高分辨率micro-CT影像分析评估中国人群副根管(ACs)的流行性、分布和形态特征。

这篇研究的目的是通过高分辨率micro-CT影像分析评估中国人群副根管(ACs)的流行性、分布和形态特征。

研究以15-μm分辨率为条件扫描1400颗离体恒牙。分析这些牙齿ACs的流行性和分布情况。ACs数量的统计基于以下形态特征:明显的ACs并且没有分支、堵塞的ACs并且没有分支以及有分支的ACs。明显的ACs通过虚拟分段以检测它们的长度和弯曲度。

结果显示,735颗牙齿存在ACs (401 upper and 334 lower teeth)。上颌和下颌磨牙的近颊及近中根ACs发生率更高。检测到的1611个ACs中,1182个为明显ACs并且没有分支,291个为堵塞的ACs并且没有分支,138个为有分支的ACs。在这些ACs中,114个为1-2型,20个为2-1型,4个为1-2-1型。大多数ACs位于根管尖端1/3 (86.5%),平均长度为880.9 μm。在根尖1/3的ACs 长度明显短于根中和根冠1/3 (P < .05)。

结论:就中国人群而言,大多数ACs位于根尖1/3,而其长度明显短于根管的根中和根冠1/3。由于ACs更多的出现于前磨牙和磨牙中,为此在根管治疗过程中需要更加注意它们的解剖形态特征。

原始出处

Xu T, Fan W, et al. Micro-computed Tomographic Evaluation of the Prevalence, Distribution, and Morphologic Features of Accessory Canals in Chinese Permanent Teeth. J Endod. 2019 Jun 12. pii: S0099-2399(19)30290-0. doi: 10.1016/j.joen.2019.04.001.

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    2020-02-15 仁者大医
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    2020-03-15 xjy02
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    2020-02-19 tulenzi
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    2019-07-03 zhaozuguo

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