Finite element analysis of elderly femoral neck fracture based on LS-DYNA

doi:10.3969/j.issn.2095-4344.2016.44.010

Abstract

Abstract:

BACKGROUND: With the increasing of aging, the incidence and mortality of osteoporotic hip fracture will rise. It is of great significance to study the pathogenesis and preventing method. At present, finite element analysis can be used to judge fracture, only for the distribution trend of fracture failure in the starting point or section view, but it cannot completely reflect actual situation of fracture.

OBJECTIVE: To build the fracture model of the femoral neck fracture caused by falling-induced external force based on the finite element analysis LS-DYNA software, and to evaluate the effect of rupture.

METHODS: CT image data of one case of elderly femoral neck fracture were collected. Using Mimics software, region growth of the contralateral area, cavity filling, editing, rebuilding the contralateral proximal femur model were conducted. Data were imported in Hypermesh and LS-DYNA software for meshing, and defining material properties. The failure parameters and interfacial properties were set. The load and force boundary constraints simulating the falling were simulated. The model of femoral neck fracture was calculated. Rupture effect was evaluated.

RESULTS AND CONCLUSION: (1) The validity of contralateral proximal femur three-dimensional model was verified. Based on the finite element analysis software LS-DYNA, the femoral neck fracture model matched the actual fracture line to a degree of close to 83%. (2) Above results confirmed that based on the finite element analysis, LS-DYNA software can well simulate the femoral neck fracture, which provides experimental basis to the exploration of femoral neck fracture classification mechanism caused by different falling-induced external forces.

中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程

Key words: Femoral Neck Fractures, Aged, Finite Element Analysis, Tissue Engineering

CLC Number:

R318

Li Peng-fei, Du Gen-fa, Lin Zi-ling, Pang Zhi-hui, Fan Yue-guang, He Xiang-xin, Sun Wen-tao,Chen Jin-lun. Finite element analysis of elderly femoral neck fracture based on LS-DYNA[J]. Chinese Journal of Tissue Engineering Research, 2016, 20(44): 6606-6611.

Figures/Tables 2

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