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首页> 外文期刊>Journal of shoulder and elbow surgery >An anthropometric study of the distal humerus
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An anthropometric study of the distal humerus

机译：肱骨远端的人体测量研究

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Background: The optimal articular shape for distal humeral hemiarthroplasty has not been defined because of a paucity of data quantifying the morphology of the normal distal humerus. This study defines the osseous anatomy and anatomic variability of the distal humerus using 3-dimensional imaging techniques. Methods: Three-dimensional surface models were created from computed tomography scans obtained from 50 unpaired human cadaveric elbows. Geometric centers of the capitellum and the trochlear groove defined the anatomic flexion-extension axis. A coordinate system was created, and the distal humerus was sectioned into 100 slices along this axis. The C line was defined as the line of best fit connecting the geometric centers of each of the slices. Results: The anatomic flexion-extension axis of the distal humerus was found to be an average of 1° ± 1° from the C line (range, 0°-3°) in the coronal plane and 2° ± 1° (range, 0°-7°) in the transverse plane. The average trochlear width was 22 ± 3 mm, and the average trochlear height was 18 ± 2 mm. The mean width of the capitellum was 17 ± 2 mm; the height was 23 ± 2 mm (P < .001). Conclusions: The difference in the capitellum width and height demonstrates that the capitellum is ellipsoid, not spherical. A data bank of humeral dimensions may be used for the development of future distal humeral hemiarthroplasty implants. A more anatomic implant may optimize kinematics and maximize contact area, thus minimizing contact stresses on the native ulna and radius.
机译：背景：由于缺乏量化正常肱骨远端形态的数据，因此尚未确定肱骨远端半髋成形术的最佳关节形状。这项研究使用3维成像技术定义了肱骨远端的骨解剖结构和解剖变异性。方法：从50个不成对的人体尸体肘部获得的计算机断层扫描中创建三维表面模型。前庭和滑车槽的几何中心定义了解剖学上的屈伸轴。创建了一个坐标系，并将肱骨远端沿该轴切成100个切片。 C线定义为连接每个切片的几何中心的最佳拟合线。结果：发现肱骨远端的弯曲屈伸轴与冠状平面的C线（范围：0°-3°）之间平均为1°±1°，范围为2°±1°（范围内，在横向平面中为0°-7°）。滑车的平均宽度为22±3毫米，滑车的平均高度为18±2毫米。头皮的平均宽度为17±2毫米;高度为23±2毫米（P <.001）。结论：小脑袋宽度和高度的差异表明小脑袋是椭圆形，而不是球形。肱骨尺寸数据库可用于将来的肱骨远端半髋置换植入物的开发。更具解剖学的植入物可以优化运动学并最大化接触面积，从而最大程度地减小对天然尺骨和radius骨的接触应力。

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