髌骨的三维有限元重建及初步力学分析  

The Reconstruction of 3D Finite-element Model of Patella and Preliminary Force Analysis

作　　者：吴宇峰[1] 苏培基[1] 伍中庆[1] 李军朋[2] 张美超[2] 李义凯[2] 

机构地区：[1]广东省中山市中医院,广东中山510120 [2]广州第一军医大学

出　　处：《中国中医骨伤科杂志》2004年第2期1-3,共3页Chinese Journal of Traditional Medical Traumatology & Orthopedics

摘　　要：目的 :建立髌骨三维有限元模型 ,并对所建模型做出初步的力学分析。方法 :根据螺旋 CT扫描图像 ,利用 Ansys有限元软件的由下向上的点、线、面、体的建模原则 ,对髌骨三维有限元模型进行重建 ,并在重建的基础上模拟髌骨的受力机制 ,分析其应力大小和应力分布情况。结果 :建立了髌骨的三维有限元模型 ,对髌骨的有限元分析结果显示应力集中区分布在髌骨的上极和下极。结论 :建立了髌骨的有限元模型 ,该模型能逼真地反应髌骨的真实几何结构。对髌骨的有限元分析结果显示应力集中区分布在髌骨的上极和下极 ,说明骨折的好发部位即在髌骨的上下极 。Objective:To build a patella three-dimension finite-element model and to make a preliminary force analysis on the founded model.Methods:According to the model-building principle from point to line to area to volume of Ansys software, a patella three-dimension finite-element model was reconstructed on the basis of the images of spiral CT. Furthermore, the stress values and distribution of the patella model, part of the above reconstructed knee joint, were analyzed by simulating force mechanism of the patella in human body.Results:A patella three-dimension finite-element model was reconstructed. The result of finite-element analysis of patella model indicated the stress mainly concentrated and distributed in the superior pole and inferior pole of patella.Conclusion:A patella three-dimension finite-element model, which can reflect the real geometry structure of the patella vividly, was reconstructed. The result of finite-element analysis of patella model indicated the stress mainly concentrated and distributed in the superior pole and inferior pole of patella. It suggested the superior pole and inferior pole of patella be the sites where fractures are usually taken place. The result was consistent with the known facts in clinic.

关 键 词：髌骨 有限元 三维重建 

分 类 号：R683.42[医药卫生—骨科学]