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首页> 外文期刊>Clinical biomechanics >Roll-over shapes of the ankle-foot and knee-ankle-foot systems of able-bodied children.
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Roll-over shapes of the ankle-foot and knee-ankle-foot systems of able-bodied children.

机译：身体健壮的孩子的脚踝和膝盖-脚踝系统的翻转形状。

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BACKGROUND: The roll-over shape is the effective rocker shape that a lower limb system conforms to during a step. The roll-over shape concept has been explored in detail in adults and has been successfully used in the design, evaluation, and alignment of lower limb prostheses and orthoses. No such analysis exists for the pediatric population. Therefore, the purpose of this study was to investigate the ankle-foot and knee-ankle-foot roll-over shapes in able-bodied children, values that could serve as tools for design and evaluation of lower limb pediatric prostheses and orthoses. METHODS: This study describes a multi-center retrospective review of existing motion analysis data (n=153 from three centers). Roll-over shapes were calculated by transforming center of pressure data from a laboratory-based coordinate system into two body-based coordinate systems. Roll-over shapes were then characterized using a circular arc model. Best-fit radii of roll-over shapes for children in three age groups (3-7 years, 8-11 years, and 12-17 years) were compared using the Kruskal-Wallis test. FINDINGS: No significant changes were found in roll-over shape radii between the three age groups (P=0.54 for ankle-foot roll-over shape radii; P=0.12 for knee-ankle-foot roll-over shape radii). The weighted mean of median radii for ankle-foot and knee-ankle-foot roll-over shapes from the three centers were approximately 22% and 17% of body stature, values similar to those seen in adults. INTERPRETATION: Children produce nearly circular knee-ankle-foot roll-over shapes at a young age that are similar to those seen in adults when scaled by body stature.
机译：背景：翻转形状是下肢系统在踩踏过程中所遵循的有效摇杆形状。翻转形状的概念已在成人中进行了详细研究，并已成功用于下肢假体和矫形器的设计，评估和对齐。对于儿科人群不存在此类分析。因此，本研究的目的是研究健全儿童的踝足和膝踝足翻转形状，这些值可作为设计和评估下肢儿科假肢和矫形器的工具。方法：本研究描述了现有运动分析数据（来自三个中心的n = 153）的多中心回顾性研究。通过将压力中心的数据从基于实验室的坐标系转换为两个基于身体的坐标系来计算翻转形状。然后使用圆弧模型对翻转形状进行表征。使用Kruskal-Wallis检验比较了三个年龄段（3-7岁，8-11岁和12-17岁）儿童的最佳翻身形状半径。结果发现，三个年龄组之间的翻身半径没有显着变化（踝足翻身半径为P = 0.54;膝盖-踝足翻身半径为P = 0.12）。来自三个中心的踝足和膝踝足翻转形状的中值半径的加权平均值约为身高的22％和17％，该值与成人所见相似。解释：儿童在年幼时会产生几乎圆形的膝盖，踝，脚翻转形状，与成年人按身高进行缩放时所见的形状相似。

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