Combinations of trabecular and cortical bone properties distinguish various loading modalities between athletes and controls
Combinations of trabecular and cortical bone properties distinguish various loading modalities between athletes and controls
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DOI：
10.1002/ajpa.24176
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发表时间：
2020-11-27
影响因子：
2.8
通讯作者：
Stock, Jay T.
中科院分区：
文献类型：
--
作者：
Saers, Jaap P. P.;DeMars, Lily J.;Stock, Jay T.
目的骨小梁和皮质骨特性的变化常被用来推断过去的习惯性行为。然而，这两种类型的骨结构很少被一起考虑，甚至在功能解释中可能相互矛盾。我们研究了各种运动员和久坐不动的对照组的骨小梁和皮质骨特性，以澄清皮质骨和骨小梁特性的组合与各种负荷models.Materials和方法之间的关联。我们比较了83名男性运动员的胫骨外周定量计算机断层扫描的骨小梁和皮质骨特性（跑步，曲棍球，游泳，板球）和久坐不动的控制使用贝叶斯多层次模型。我们量化的中段骨干皮质骨刚度和面积（J，CA），中段形状指数（Imax/Imin），和平均骨小梁密度（BMD）在胫骨远端。皮质骨硬度在涉及冲击负荷的运动（板球，跑步，曲棍球）中较高，而在非冲击负荷的游泳运动员和对照组中较低。与其他组相比，跑步者有更多的前后椭圆形中段。有趣的是，所有的运动员都有更大的骨小梁骨密度相比，控制，但不difficully之间each other.Discussion结果表明，皮质中层肥大与冲击负荷，而骨小梁骨密度是正相关的影响和非冲击负荷。中轴形状与载荷方向相关。来自不同类别的个体基本上重叠，但组平均值明显不同，这表明当分析骨小梁和皮质骨的组合时，对习惯性行为进行细致入微的组水平推断是可能的。
Objectives Variation in trabecular and cortical bone properties is often used to infer habitual behavior in the past. However, the structures of both types of bone are rarely considered together and may even contradict each other in functional interpretations. We examine trabecular and cortical bone properties in various athletes and sedentary controls to clarify the associations between combinations of cortical and trabecular bone properties and various loading modalities.Materials and methods We compare trabecular and cortical bone properties using peripheral quantitative computed tomography scans of the tibia between groups of 83 male athletes (running, hockey, swimming, cricket) and sedentary controls using Bayesian multilevel models. We quantify midshaft cortical bone rigidity and area (J, CA), midshaft shape index (Imax/Imin), and mean trabecular bone mineral density (BMD) in the distal tibia.Results All groups show unique combinations of biomechanical properties. Cortical bone rigidity is high in sports that involve impact loading (cricket, running, hockey) and low in nonimpact loaded swimmers and controls. Runners have more anteroposteriorly elliptical midshafts compared to other groups. Interestingly, all athletes have greater trabecular BMD compared to controls, but do not differ credibly among each other.Discussion Results suggest that cortical midshaft hypertrophy is associated with impact loading while trabecular BMD is positively associated with both impact and nonimpact loading. Midshaft shape is associated with directionality of loading. Individuals from the different categories overlap substantially, but group means differ credibly, suggesting that nuanced group-level inferences of habitual behavior are possible when combinations of trabecular and cortical bone are analyzed.