基于有限元法的跟骨生物力学分析

目的 基于有限元方法分析跟骨的生物力学特性。方法 通过CT扫描，利用Mimics、Geomagic等软件，建立跟骨有限元模型，并分析在正常站立和外力冲击下跟骨的应力分布和位移趋势。结果 在正常站立情况下，跟骨应力、应变整体分布均匀，应力、应变均较小；在受到外力冲击作用下，跟骨的整体应力、应变有明显的上升，其跟骰关节面的应力、应变明显增大。结论 通过有限元方法分析跟骨中立位时在不同加载情况下跟骨的应力、应变情况，进一步探讨跟骨的生物力学特性以及跟骨骨折发生机制，为临床跟骨骨折治疗提供一定的理论依据。
Objective To investigate the biomechanical properties of human calcaneus by finite element method. Methods Through CT scanning, Mimics, Geomagic and other software, the finite element model of calcaneus was established. The stress distribution and displacement tendency of calcaneus under normal standing and external force were analyzed. Results Under normal standing, the calcaneal stress was uniformly distributed and small. Under external force, the entire calcaneus stress increased significantly, and the stress on calcaneocuboid articular surface also obviously increased. Conclusions The analysis of the stress and strain distribution on calcaneus in neutral position under different loading, and the investigation on biomechanical properties of calcaneus and mechanism of calcaneal fracture will provide theoretical basis for clinical treatment of calcaneal fractures.