Estimated third metatarsal bending stresses are highly susceptible to variations in bone geometry
Estimated third metatarsal bending stresses are highly susceptible to variations in bone geometry
复制标题
估计的第三跖骨弯曲应力非常容易受到骨骼几何形状变化的影响
DOI：
10.1080/19424280.2017.1344326
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发表时间：
2017
期刊：
影响因子：
3
通讯作者：
S. Dixon
中科院分区：
文献类型：
--
作者：
Michael Nunns;V. Stiles;J. Fulford;S. Dixon
背景资料：第三跖骨应力性骨折在皇家海军陆战队新兵训练中相对常见，然而，其病因却知之甚少。第三跖骨的数学模型可能有助于理解应力性骨折的风险因素，特别是如果可以确定鞋类对峰值弯曲应力的影响。这项研究建立在以前的跖骨弯曲应力模型，整合个人跖骨几何形状和步态数据。方法：数据从5名男性与尺寸11（英国）的脚。将MRI图像数字化以确定横截面骨参数。步态变量包括垂直地面反作用力，足底压力和脚的方向。在比较标准的战斗靴和训练鞋之前，计算赤脚跑步的峰值弯曲应力的大小和位置。调查结果：战斗突击靴的压缩、拉伸和扭转应力峰值估计值大于训练靴（p < 0.05），效应量中等，但置信区间较宽。然而，个体间骨几何形状的差异对估计的峰值应力有更大的影响。解释：结果表明，骨骼几何形状对第三跖骨应力性骨折风险的影响大于鞋类。未来的骨应力模拟应考虑骨几何结构。模型在不同参与者中的进一步发展应继续验证这些建议。
Background: Third metatarsal stress fractures are relatively common during Royal Marines recruit training; however, their aetiology is poorly understood. Mathematical modelling of the third metatarsal may aid in understanding risk factors for stress fracture, particularly if the influence of footwear on peak bending stresses can be determined. This study built on previous models of metatarsal bending stress by integrating individual metatarsal geometry and gait data. Methods: Data from five males with size 11 (UK) feet were acquired. MRI images were digitised to determine cross-sectional bone parameters. Gait variables included vertical ground reaction forces, plantar pressure and foot orientation. The magnitude and location of peak bending stresses were calculated for barefoot running, before standard issue combat boots and trainers were compared. Findings: Estimated peak compressive, tensile and torsional stresses were greater in combat assault boots than in trainers (p < 0.05) with medium effect sizes but wide confidence intervals. However, differences in bone geometry between individuals had a much greater influence on estimated peak stresses. Interpretation: Results suggest that bone geometry has a greater influence on third metatarsal stress fracture risk than footwear. Future bone stress simulations should account for bone geometry. Further development of the model in a variety of participants should proceed to verify these suggestions.
影响因子：
1.8
作者：
Bus, SA;Ulbrecht, JS;Cavanagh, PR
通讯作者：
Cavanagh, PR