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J Endod:没有明显口内X线阴影的牙齿在CBCT影像下尖周透射区的发生率及大小

2018-02-07 lishiting MedSci原创

这篇研究的目的是为了检测口内没有明显X线损伤征兆的牙齿在锥束CT(CBCT)影像下根尖周可透射区的发生率以及大小。

这篇研究的目的是为了检测口内没有明显X线损伤征兆的牙齿在锥束CT(CBCT)影像下根尖周可透射区的发生率以及大小。研究纳入了53名患者的120颗口内没有明显X线损伤征兆的牙齿。限定容量CBCT扫描的体素大小设定为0.125-mm3。检测牙齿每个治疗过的根管根尖周X线透射区的最宽面积,并依据CBCT-牙髓X线可透射性指数(ERI)得出一项数字性评分。CBCT数据由2名放射线学者按照组间相关系数设定为0.96的水平进行评估。结果显示,大多数牙根(53.3%)的牙周膜宽度≤0.5 mm;26.7%存在X线可透射性宽度为0.5 < x ≤ 1 mm,15.0%为1.0 < x ≤ 1.5 mm,0.8%为1.5 < x ≤ 2.0 mm,1.7%为2.0 < x ≤ 2.5 mm以及2.5%为>2.5 mm。患者的年龄、复诊间隔、牙齿类型和牙弓类型对ERI的分布没有明显影响。结论:有20%经过根管治疗的牙齿通过常规尖周影像显示为治疗成功,但在CBCT影像下显示存在面积大约1 mm的尖周可透射区。因为这些可透射区可能不是病理性改变,临床工作者需要谨慎小心,在确定这些

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    2018-02-09 piaojinhua
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    2018-02-09 zhouqu_8

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