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用于量化骨骼关节形状和一致性的曲率极坐标直方图。

Polar histograms of curvature for quantifying skeletal joint shape and congruence.

作者信息

Halilaj Eni, Laidlaw David H, Moore Douglas C, Crisco Joseph J

出版信息

J Biomech Eng. 2014 Sep;136(9):094503. doi: 10.1115/1.4027938.

Abstract

The effect of articular joint shape and congruence on kinematics, contact stress, and the natural progression of joint disease continue to be a topic of interest in the orthopedic biomechanics literature. Currently, the most widely used metrics of assessing skeletal joint shape and congruence are based on average principal curvatures across the articular surfaces. Here we propose a method for comparing articular joint shape and quantifying joint congruence based on three-dimensional (3D) histograms of curvature--shape descriptors that preserve spatial information. Illustrated by experimental results from the trapeziometacarpal joint, this method could help unveil the interrelations between joint shape and function and provide much needed insight for the high incidence of osteoarthritis (OA)--a mechanically mediated disease whose onset has been hypothesized to be precipitated by joint incongruity.

摘要

关节形状和匹配度对运动学、接触应力以及关节疾病自然进展的影响,一直是骨科生物力学文献中备受关注的话题。目前,评估骨骼关节形状和匹配度最广泛使用的指标是基于关节表面的平均主曲率。在此,我们提出一种基于曲率的三维(3D)直方图——保留空间信息的形状描述符,来比较关节形状并量化关节匹配度的方法。通过大多角骨掌指关节的实验结果表明,该方法有助于揭示关节形状与功能之间的相互关系,并为骨关节炎(OA)的高发病率提供急需的见解——OA是一种机械介导的疾病,其发病被认为是由关节不匹配引发的。

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