Department of Mechanical Engineering, University of Sheffield, UK; Insigneo Institute for in silico Medicine, University of Sheffield, UK.
Department of Mechanical Engineering, University of Sheffield, UK; Insigneo Institute for in silico Medicine, University of Sheffield, UK.
Clin Radiol. 2020 Jan;75(1):78.e9-78.e16. doi: 10.1016/j.crad.2019.08.026. Epub 2019 Oct 4.
To use personalised computed tomography (CT)-based finite element models to quantitatively investigate the likelihood of self-inflicted humeral fracture in non-ambulant infants secondary to rolling.
Three whole-body post-mortem CT examinations of children at the age of rolling (two 4-month-old and one 6-month-old) were used. The mechanical moment needed by each infant to perform a rolling manoeuvre was calculated and applied to the finite element model in order to simulate spontaneous rolling from the prone to the supine position.
The maximum predicted strains were found to be substantially lower (with a difference of >80%) than the elastic limit of the bone.
Results of this study challenge the plausibility of self-inflicted humeral fracture caused by rolling in non-ambulant infants and indicate that it is unlikely for a humeral fracture to result from this mechanism without the assistance of an external force.
利用基于个体化计算机断层扫描（CT）的有限元模型，定量研究非自主活动婴儿因翻滚导致自我造成肱骨骨折的可能性。
使用了 3 例滚动期（2 例 4 月龄和 1 例 6 月龄）儿童的全身死后 CT 检查。计算了每个婴儿进行翻滚动作所需的机械力矩，并将其应用于有限元模型，以模拟从俯卧位到仰卧位的自发性滚动。
预测的最大应变明显低于（差异>80%）骨骼的弹性极限。
本研究结果对非自主活动婴儿因翻滚导致自我造成肱骨骨折的可能性提出了质疑，并表明如果没有外力的帮助，这种机制不太可能导致肱骨骨折。
