Aili Tong

Shanghai University, Shanghai, Shanghai Shi, China

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Publications (4)0 Total impact

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    ABSTRACT: A novel method of creating models for finite element analysis (FEA) from medical images was proposed in this paper. The CT scanning images of human right hand were imported into a medical image processing software Mimics and the 3D STL model of the bone framework was reconstructed by selecting proper threshold value. A piece of the radius was cut from the bone framework model and remeshed in Magics to obtain triangles with higher quality and optimized quantity. The remeshed radius model was exported into FEA software ANSYS to create the volume mesh, and the unidirectional loading simulation was analyzed. This method eliminates the need for extensive and long time experiments and provides a helpful tool for biomedicine and tissue engineering.
    Advanced Intelligent Computing Theories and Applications. With Aspects of Contemporary Intelligent Computing Techniques, 4th International Conference on Intelligent Computing, ICIC 2008, Shanghai, China, September 15-18, 2008, Proceedings; 01/2008
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    ABSTRACT: Porous β-tricalcium phosphate (β-TCP) ceramic scaffolds with axially oriented macropore and random micropore were produced by selective laser sintering (SLS) process. Microstructure parameters including pore size, pore size distribution and interconnectivity were quantified by microcomputed tomography. Compressive mechanical properties were tested. The porosity of sintered scaffolds was over 60%. The range of average compressive modulus and ultimate strength was 24.38∼30.64MPa and 1.64∼2.35MPa, respectively. Dog bone marrow stromal cells (BMSCs) were seeded in the prepared scaffolds. Cell proliferation and osteogenic differentiation on the scaffolds were evaluated with the alkaline phosphatase (ALP) activity and osteocalcin (OCN) content.
    12/2007: pages 84-87;
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    ABSTRACT: Design optimizing is the key step in obtaining bionic scaffolds with proper shape and inner microstructure, which are two critical parameters for bionic scaffolds in Tissue Engineering. In this paper, the application of image processing and finite element analysis in the design optimizing of bionic scaffold’s shape and inner microstructure were studied respectively. The bionic scaffold’s shape was obtained through Mimics’ image processing and D reconstruction technologies. Finite element analysis (FEA) was used in evaluating the mechanical properties of scaffold’s structure models with different macro-pores shape and distribution to obtain the optimized parameters. Three groups of bioceramic scaffolds samples were fabricated through an indirect method combining stereolithography (SLA) and slurry casting, and then mechanical experiments were tested. The change trendy of the compressive strength obtained through mechanical experiments was consistent with the FEA results basically so the significance of FEA in bionic scaffolds’ design optimizing was proved.
    Life System Modeling and Simulation, International Conference, LSMS 2007, Shanghai, China, September 14-17, 2007, Proceedings; 01/2007
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    ABSTRACT: Performance of bone tissue depends on porous scaffold microstructures with specific porosity characteristics that influence the behavior of the ingrown cells. The mechanical properties of porous tissue scaffolds are important for their biomechanical tissue engineering application. In this study, the composite materials powder was developed for the selective laser sintering process, and the parameters of selective laser sintering were optimized. With the aim of evaluating the influence of porosity on mechanical properties, we have studied the load limits for three specimens of scaffolds which have different porosity. Young's modulus was computed by determining the slope of the stress - strain curve along the elastic portion of the deformation. In addition, the final element analysis (FEA) module of UG NX4 was used to analyze these scaffolds. The results showed that the bone tissue engineering scaffolds were fabricated by SLS technology have good mechanical properties, which have good potential for tissue engineering applications.
    Life System Modeling and Simulation, International Conference, LSMS 2007, Shanghai, China, September 14-17, 2007, Proceedings; 01/2007