全膝關節(jié)置換術膝關節(jié)有限元模型的構建及其力學分析
[Abstract]:Objective to construct a complex finite element model of knee joint based on multimodal CT and MRI images. The purpose of this paper is to construct the finite element model of (TKA) knee joint for total knee arthroplasty by CT and MRI image registration fusion, and to provide a model for the biomechanical simulation of TKA knee joint. Methods CT and MRI images of left knee joint were collected from a 26-year-old adult male in June 2016 in the first people's Hospital of Lianyungang City. The data were imported into Mimics software to construct a three-dimensional model of bone and non-bone structure of knee joint. The model was registered with external reference point and fused into a three-dimensional global model of knee joint. The three-dimensional model of TKA knee joint was constructed by imitating the TKA prosthesis component, and then the three-dimensional finite element model of TKA knee joint was constructed by further mesh division. After defining the properties of materials, determining the boundary conditions and loads, the finite element analysis is carried out. Results the finite element model of TKA knee joint including bone, ligament, prosthesis, polyethylene pad and bone cement layer was constructed by CT and MRI image registration fusion. The model maintained the spatial relationship of different structures in TKA knee joint. The results of finite element analysis showed that the stress distribution in TKA knee joint. The total contact area was 230mm ~ 2, 124mm ~ 2 for medial room and 106mm ~ 2 for lateral room. The contact area of medial interroom was 1.17 times of that of lateral room. The peak value of compressive stress on the upper surface of the inner chamber was 15.72 MPA, and on the upper surface of the outer chamber was 14.45 MPA. The peak value of the compressive stress of the inner chamber was 1.09 times that of the outer chamber. Conclusion the finite element model of TKA knee joint based on CT and MRI image data registration fusion provides a reliable tool for studying the biomechanical behavior of TKA knee joint.
【作者單位】: 連云港市第一人民醫(yī)院關節(jié)外科;連云港市第一人民醫(yī)院重癥醫(yī)學科;連云港市第一人民醫(yī)院疼痛科;
【基金】:國家自然科學基金(31670956) 連云港市科技局科技發(fā)展計劃項目(ZD1501) 連云港市衛(wèi)生科技項目(201506;QN1402)
【分類號】:R318.01;R687.4
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