Abstract：
The mechanism of scaphoid waist fracture is not completely understood. We used finite element analysis to study the formation of scaphoid waist fractures. Clinical computed tomography scans of 12 wrists were used to create models for finite element analysis. The points of application of load were at different sites along the scaphotrapeziotrapezoid joint distally, and the scaphoid fossa plus the area underlying the radioscaphocapitate ligament was regarded as the fixed proximal support. A fracture was produced at the scaphoid waist in all cases. The location of failure of bone at its anterior or dorsal cortex, either in tension or in compression, was determined by the site of application of the load. The anterior cortex failed in compression when the point of impact was located along the trapezium facet or the entire distal pole, whereas it failed in tension when the point of impact was along the trapezoid facet.
摘要：
舟骨腰部骨折的机制尚不完全清楚。我们使用有限元分析来研究舟骨腰部骨折的形成。12个手腕的临床计算机断层扫描扫描用于创建有限元分析的模型。载荷的施加点位于沿肩峰梯形关节远端的不同位置，舟骨窝和放射性Caphocapitate韧带下方的区域被视为固定的近端支撑。在所有情况下，舟骨腰部均发生骨折。骨的前皮质或背皮质衰竭的位置，无论是在拉伸还是在压缩中，是由负载的应用地点决定的。当撞击点位于梯形小平面或整个远端极时，前皮质受压失败。而当冲击点沿着梯形刻面时，它在张力中失败了。
