基于有限元模型的脊柱侧弯矫形器设计与验证
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1.广西科技大学 机械与汽车工程学院;2.四川川润股份有限公司;3.柳州市残疾人辅助器具中心

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Design and validation of scoliosis orthotics based on finite element model
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1.School of Mechanical and Automotive Engineering,Guangxi University of Science and Technology;2.Sichuan Chuanrun Ltd.;3.Liuzhou Disabled Auxiliary Equipment Center

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    摘要:

    摘要:目的 基于患者躯干-脊柱模型有限元仿真分析,并结合理论计算数据,对脊柱侧弯矫形器进行设计,通过3D打印验证矫形器效果。方法 以一例特发性脊柱侧弯患者为研究对象,采用逆向工程技术与计算机辅助技术建立患者躯干-脊柱模型,利用有限元方法分析该模型,结合文献理论计算确定最佳矫形力的施加位置与大小,依此设计出矫形器,为了验证矫形效果,对患者穿戴该矫形器前后进行了 X 光片的对比评估并在六个月后进行随访。结果 通过理论计算与有限元仿真确定了保证初次矫形效果最好的矫形力施加位置和大小,即对患者侧弯段脊柱L3椎体以及上下椎间盘所对应到躯干上的左后方区域位置施加62.95N的矫形力可以达到最佳的矫形效果。在此基础上,对矫形器进行结构设计,随后对设计好的矫形器进行穿戴前后的相关实验测试,通过对比患者穿戴矫形器前后的 X 光片并结合六个月后的随访数据,可以得出优化设计后的矫形器满足临床上对于矫正效果的预期要求。结论 矫形器设计应根据患者脊柱侧弯的具体情况。在整个设计过程中,利用有限元方法分析患者躯干—脊柱有限元模型,结合理论计算确定初次矫形效果最佳的矫形力施加位置与大小,并通过患者穿戴矫形器前后的 X 光片的对比以及六个月后的随访数据验证这种设计的有效性,这将为今后脊柱侧弯患者的治疗提供有力的支持。

    Abstract:

    Abstract: Objective Based on the finite element simulation analysis of the patient's torso spine model and combined with theoretical calculation data, a scoliosis orthotic device is designed, and the effectiveness of the orthotic device is verified through 3D printing. Method Taking a patient with idiopathic scoliosis as the research object, reverse engineering technology and computer-aided technology were used to establish a patient torso spine model. The finite element method was used to analyze the model, and the optimal position and size of the corrective force were determined by combining literature theory calculation. Based on this, an orthosis device was designed. To verify the corrective effect, compared and evaluated the patient's X-ray before and after the patient wore the orthotic device, and followed up for six months. Results The optimal position and magnitude of the initial corrective force were determined through theoretical calculations and finite element simulations. Specifically, a corrective force of 62.95N was applied to the L3 vertebral body and the left posterior region corresponding to the upper and lower intervertebral discs in the patient's lateral curvature segment of the spine to achieve the best corrective effect. On this basis, the structure of the orthosis was designed, followed by relevant experimental tests before and after wearing the designed orthosis. By comparing the X-ray images of patients before and after wearing the orthosis device and combining them with follow-up data six months later,, it can be concluded that the optimized design of the orthosis meets the expected clinical requirements for corrective effects. Conclusions Orthopedic design should be based on the specific situation of the patient's scoliosis. Throughout the design process, the finite element method was used to analyze the patient's torso spine finite element model, and theoretical calculations were used to determine the optimal position and size of the initial corrective force. The effectiveness of this design was verified through the comparison of X-ray images before and after the patient wore the orthotic device, as well as follow-up data six months later. This will provide strong support for the treatment of scoliosis patients in the future.

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  • 收稿日期:2024-11-15
  • 最后修改日期:2025-01-06
  • 录用日期:2025-01-08
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