Creation of a simple distal femur morphology classification system
Creation of a simple distal femur morphology classification system
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DOI：
10.1002/jor.23102
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发表时间：
2016-06-01
影响因子：
2.8
通讯作者：
Flanigan, David C.
中科院分区：
文献类型：
--
作者：
Everhart, Joshua S.;Chaudhari, Ajit M. W.;Flanigan, David C.
本研究的目的是提出一个基于简单测量的二元分类系统，总结股骨远端形状的个体、种族和性别特异性差异。使用三维激光扫描仪创建了165个股骨远端（79名女性，86名男性; 85名非洲裔美国人，80名高加索人，28.8 +/- 7.6岁）的表面模型。测量表面积、宽度、长度、曲率和成角。将膝关节分为A型或B型，分为五个不同类别：（i）纵横比，（ii）滑车-髁间宽度比，（iii）滑车倾斜，（iv）内外侧滑车宽度比，和（v）滑车沟形状。计算这些测量值与表面积之间的相关性，并使用受试者-操作者曲线选择A型和B型膝关节之间的临界值，以改善性别或种族对股骨形状的区分。A型和B型膝关节之间的五个类别的截止值如下：I类：0.90度，II类：0.51度，III类：1.02度，IV类：0.67度，V类：128.7度。除IV类（内外侧转子宽度比）（p=0.004，R=0.22）外，没有类别与表面积相关（p>0.25）。I类（长宽比，临界值=0.90）性别最佳分化股骨（p
The purpose of this study is to propose a binary classification system based on simple measurements that summarizes individual, race, and sex-specific differences in distal femur shape. Surface models of 165 distal femurs (79 female, 86 male; 85 African-American, 80 Caucasian, 28.8 +/- 7.6 years) were created with a 3-dimensional laser scanner. Surface area, width, length, curvature, and angulation were measured. Knees were classified as either type A or B within five distinct categories: (i) aspect ratio, (ii) trochlear-intercondylar width ratio, (iii) trochlear tilt, (iv) medial-lateral trochlear width ratio, and (v) trochlear sulcus shape. Correlations between these measures and surface area were calculated, and receiver-operator curves were used to select cutoff values between type A and B knees to improve differentiation of femur shapes by sex or race. The cutoff values between type A and B knees for the five categories are as follows: Category I: 0.90, Category II: 0.51, Category III: 1.02, Category IV: 0.67, and Category V: 128.7 degrees. Other than category IV (medial-lateral trochlear width ratio) (p=0.004, R=0.22), no categories were correlated with surface area (p>0.25). Category I (aspect ratio, cutoff=0.90) best differentiated femurs by sex (p