一种三维牙颌网格模型的牙冠宽度测量方法及相关装置

By using mesh projection and principal component analysis feature dimensionality reduction methods, the crown width of a three-dimensional dental model is automatically measured, solving the problems of low efficiency and insufficient accuracy of manual measurement in existing technologies, and achieving efficient and accurate crown width measurement.

CN117392202BActive Publication Date: 2026-07-17XI AN JIAOTONG UNIV +1

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Filing Date
2023-10-12
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In current technology, measuring the crown width of a three-dimensional dental model relies on manual measurement by a professional dentist, which is inefficient, costly, and difficult to guarantee measurement accuracy, especially for malformed teeth.

Method used

By employing mesh projection and principal component analysis feature dimensionality reduction methods, the crown width is automatically measured by calculating the normal vector and scale line of the crown mesh. The use of normal vector features and principal component analysis eliminates the need for manual intervention.

Benefits of technology

It enables personalized crown width measurement without human intervention, improving measurement efficiency and accuracy, reducing measurement costs, and enhancing the universal applicability of the algorithm.

✦ Generated by Eureka AI based on patent content.

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Abstract

本发明公开了一种三维牙颌网格模型的牙冠宽度测量方法及相关装置,首先获得三维牙颌网格模型,并对每个牙冠所包含三角网格的中心点,分别做咬合面方向上的原始投影和法向量投影;获得二维投影后,使用基于动态标定点的主成分分析降维方法,以获取能表征每个牙冠宽度测量方向的标尺线;以扫掠的方式计算所得每个牙冠的标尺线与其二维投影区域的交点集合;计算每个牙冠每对交点的距离,得到交点距离集,从中选取最大点距即为对应牙冠的宽度。本发明通过基于法向量的网格投影和主成分分析方法能够从三维模型中全自动地准确获得牙冠宽度测量点,无需人工参与,提高牙冠宽度测量的精确度和效率。
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