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在 3D CBCT 图像中定位 Ricketts' Xi 点的一种技术:一个横截面研究

Nithin Vaishag Rajesh¹, Rahul Damodaran Prabha¹, Sapna Varma Nilambur Kovilakam¹

¹Department of Orthodontics and Dentofacial Orthopedics, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India.

Journal of orthodontics

|August 12, 2025

概括

这项研究开发了一种使用3D圆束计算断层扫描 (CBCT) 来定位Xi点的协议. 这就是西点 (Xi point).

科学领域:

牙科和口腔外科牙科和口腔外科
放射学和成像学放射学和成像学

背景情况:

准确的解剖学地标识别在牙科和正手术中至关重要.
从里克特的分析中得出的Xi点在外科手术规划中具有潜在的应用.
三维圆束计算断层扫描 (CBCT) 提供了对面结构的详细可视化.

研究的目的:

建立一个使用3D CBCT定位Xi点的协议.
在CBCT图像上测量Xi点和下孔之间的线性距离.
评估西点作为解剖结构参考的可靠性.

主要方法:

对35个成年CBCT扫描进行了回顾性横截面研究.
在下大腿骨的横向视图上,使用里克特的分析点 (R1-R4) 构建了Xi点.
在CBCT上确定了下孔,并测量了它与Xi点的距离.

主要成果:

3D Xi点始终位于下大腿骨的侧面,上部和远部的下孔.
习点和下孔之间的平均距离在右侧和左侧为2.3毫米 (右侧±1.46毫米,左侧±1.53毫米).

结论:

该研究成功验证了使用3D CBCT构建Xi点及其与下孔的空间关系.
习点与下孔的距离可以作为识别下膜神经的指南.
这些发现对精确的骨螺丝放置和正牙生长预测有影响.

关键词:

一个点,一个点,一个点.圆束计算机断层扫描技术底孔 (Mandibular Foramen) 是一个底孔.

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