J Endod:3维分析和文献回顾根管结构以及生理性根尖孔的几何形态

2020-01-20 lishiting MedSci原创

这篇研究的目的是通过micro-CT影像分析下颌切牙的根管系统形态变化。

这篇研究的目的是通过micro-CT影像分析下颌切牙的根管系统形态变化。

研究通过micro-CT影像和3维分析软件对125颗下颌切牙的根管结构、生理性根尖孔、副管和连通根管发生率以及生理性根尖孔的大小和形态进行观察和分析。通过4位数字系统描述根冠/中/尖1/3的根管结构和生理性根尖孔数量。

结果显示,最常见的根管结构为1-1-1/1 (56%), 1-2-1/1 (17.6%)和1-1-1/2 (10.4%)型;还发现了9个额外的不同根管结构。单根切牙分别有80%为1个根尖孔, 16%为2个以及4%为3个。在所检测牙齿中仅有13.6%存在副管。36%的样本具有连通根管,最常见于1-2-1/1 (12.8%)和2-2-1/1 (7.2%)型根管结构中。共检测了146个生理性根尖孔的3维形态。当仅存一个生理性根尖孔时,它们的平均宽窄直径为0.24 mm (standard deviation = 0.1 mm)和0.23 mm (standard deviation = 0.08 mm)。生理性根尖孔的形态为椭圆(56%), 圆(28.8%)和不规则(15.2%)。

结论:这篇研究提供了德国人群关于前牙根管形态的详细信息。在文章的研究范围内,作者基于调查结果建议生理性根尖孔终预备至ISO 30-35号;但是,此项决策在个别案例中还需谨慎运用。

原始出处:


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    2020-01-21 qingfengqishi5

    学习了,学习了

    0

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    2020-01-21 Dr Z

    学习了

    0