EFFECT OF LOADING DIRECTION AND BONE DENSITY DISTRIBUTION IN ASSESSING HIP FRACTURE VIA FINITE ELEMENT ANALYSIS

摘要

An accurate assessment of hip fracture risk requires a proper consideration of parameters affecting the fracture. In general, hip fracture is affected by bone morphology, bone mineral Density (BMD), and load amount. Hip fracture is an outcome of the interaction of all those parameters including loading directions. Assessing the effect of the parameters individually may not correctly reflect the root cause of the hip fracture. Hence, this research aims at analyzing the significance of parameters and their interaction. A multivariate regression model was used considering bone density (p_(ash)), different loading directions during sideways fall, represented by load angle (a) on the coronal plane and angle (β) on the transverse plane as independent parameters and Fracture Risk Index (FRI) as a dependent parameter. The statistical results showing the significant value of 0.7321 for a, and 0.0001 for β and p_(ash) indicates that the effect of loading direction about femoral shaft on the coronal plane (a) does not have impact on fracture risk while loading direction about femoral neck axis on the transverse plane (β) and p_(ash) have the significant impact. Furthermore, the analysis of the interaction of parameters shows that the impact of β on fracture risk may depends more on bone density as the significance of interaction of β and p_(ash) is 0.0001.