军事医学2016，Vol.40Issue(12)：988-993,6.DOI:10.7644/j.issn.1674-9960.2016.12.011
胫骨骨折有限元模型建立及生物力学分析
Finite element modeling of tibial fracture and its biomechanical analysis
摘要
Abstract
Objective To establish CT image-based, three-dimensional finite element models of healthy tibiae and plateau-fracture tibiae, and to calculate the displacement and stress distribution of the tibial models .Methods Continuous-time tomographic images of knee joints of a healthy adult and a patient with tibial plateau fractures were obtained using multi-slice spiral CT scan , and inputed to Mimics to establish three-dimensional surface mesh models of tibiae .The models underwent global meshing procedures and material properties assignment to construct finite element models of normal and plateau-fracture tibiae in ANSYS , and the newly established models were analyzed and calculated .Results In case of applied load on the tibial plateau , the peak strains of the load-contact sites in the healthy subject and the patient presented divergent directions , with peak strains on the medial tibia in the healthy subject and lateral tibia in the patient , respectively . Equivalent stress decreased gradually down the tibiae and concentrated in the one -third of the upper and middle regions in both types of tibiae .Moreover, concentration of stress was also present in the locus of the fractured tibia .The deformation displacement gradients were more evident in the healthy tibia than in the fractured tibiae .There was significant difference in overall stress distribution between the two types of tibiae .Conclusion Three-dimensional finite element models of tibiae have been established that can demonstrate the differences in biomechanical properties between healthy and plateau -fracture tibiae, which might provide reference and guidance for orthopedic regimens .关键词
胫骨骨折/胫骨平台/有限元/应力分布/生物力学Key words
tibial fractures/tibial plateau/finite element/stress distribution/biomechanics分类
医药卫生引用本文复制引用
赵英红,平杰,吴仁愿,马乐艳,余先超,孙存杰,徐航..胫骨骨折有限元模型建立及生物力学分析[J].军事医学,2016,40(12):988-993,6.基金项目
国家自然科学基金资助项目（81601635）；江苏省科技计划资助项目 （）
