中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (53): 8597-8602.doi: 10.3969/j.issn.2095-4344.2015.53.012

• 数字化骨科 digital orthopedics • 上一篇    下一篇

Lenke3型成人特发性脊柱侧凸有限元模型及胸椎钉道导靶3D模型的建立

辛大奇1,霍洪军1,胡侦明2,杨学军1,邢文华1,赵 岩1,汉 迪3,李剑锋1   

  1. 1内蒙古医科大学第二附属医院,内蒙古自治区呼和浩特市 010030; 2重庆医科大学附属第一医院骨科,重庆市 630014;3内蒙古医科大学第一附属医院,内蒙古自治区呼和浩特市 010030
  • 收稿日期:2015-11-23 出版日期:2015-12-24
  • 通讯作者: 胡侦明,博士,重庆医科大学附属第一医院骨科,重庆市 630014
  • 作者简介:辛大奇,男,1980年生,汉族,内蒙古自治区突泉县人,2011年内蒙古医科大学毕业,硕士,主治医师。
  • 基金资助:
    国家自然科学基金(81160216);内蒙古医科大学青年创新基金(YKDX2014QNCX021)

Construction of Lenke3 type adult idiopathic scoliosis finite element model and thoracic screw guide target 3D model

Xin Da-qi1, Huo Hong-jun1, Hu Zhen-ming2, Yang Xue-jun1, Xing Wen-hua1, Zhao Yan1, Han Di3,
Li Jian-feng1   

  1. 1the Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010030, Inner Mongelia Autonomous Region, China; 2Department of Orthopedics, the First Affiliated Hospital of Chongqing Medical University, Chongqing 630014, China; 3the First Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010030, Inner Mongelia Autonomous Region, China
  • Received:2015-11-23 Online:2015-12-24
  • Contact: Hu Zhen-ming, M.D., Department of Orthopedics, the First Affiliated Hospital of Chongqing Medical University, Chongqing 630014, China
  • About author:Xin Da-qi, Master, Attending physician, the Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010030, Inner Mongelia Autonomous Region, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81160216; Youth Innovation Fund from Inner Mongolia Medical University, No. YKDX2014QNCX021

摘要:

背景:有研究表明后路矫形内固定及前路矫形内固定对于治疗成人特发性脊柱侧凸均可获得良好的临床效果,但哪一种方法对于Lenke3型成人特发性脊柱侧凸临床效果更佳,椎弓根螺钉发生断裂的风险更小,同时远期疗效更可靠尚无报道。
目的:利用有限元分析软件建立Lenke3型成人特发性脊柱侧凸有限元模型,同时建立胸椎钉道导靶3D模型,为其生物力学分析及科学置钉提供科学依据。
方法:将1例28岁Lenke3型成人特发性脊柱侧凸志愿者从T1至骶骨的CT图像以Dicom格式导入Mimics 16.0软件中,通过几何清理建立完整的脊柱侧凸三维模型,于椎体模型上利用Mimics 16.0软件中设计模块建立胸椎钉道导靶。将三维模型点云格式导入Geomagic Studio 11.0软件中,对模型进行一系列图像处理,最后将三维模型导入ANSYS 14.0有限元分软件中建立具有生物性能的有限元模型。
结果与结论:成功建立了完整的Lenke3型成人特发性脊柱侧凸三维有限元模型,包括四面体单元440 975个和杆单元 580个,共计441 555个单元,1 077 318个节点。成功建立了12个胸椎的钉道导靶模型包括四面体单元4 682个,7 390个节点,试验建立了外形逼真的Lenke3型成人特发性脊柱侧凸三维有限元模型及其胸椎钉道导靶模型。结果证实,建立的Lenke3型成人特发性脊柱侧凸三维有限元模型,为进一步的生物力学实验提供科学依据,胸椎钉道导靶模型的建立为胸椎椎弓根螺钉置钉提供一种新的科学方法。 

关键词: 骨科植入物, 数字化骨科, 成人特发性脊柱侧凸, Lenke3型, 有限元, 网格划分, 实体单元, 节点, 椎弓根, 3D, 生物力学, 国家自然科学基金

Abstract:

BACKGROUND: Studies have shown that posterior orthopedic internal fixation and anterior orthopedic internal fixation all can get good clinical outcomes for treatment of adult idiopathic scoliosis, however, it has not been reported on what kind of methods could achieve a better clinical outcome for treatment of Lenke3 type adult idiopathic scoliosis, have less risk of pedicle screws breakage and more reliable long-term efficacy.

 

OBJECTIVE: To establish the Lenke 3 type adult idiopathic scoliosis finite element model and thoracic screw guide target 3D model using finite element analysis software, so as to provide scientific basis for biomechanical analysis and scientific pedicle screw implantation.
METHODS:The CT scan image from T1 to sacrum of one 28 years old volunteer with Lenke 3 type adult idiopathic scoliosis was imported into Mimics 16.0 software by Dicom form. Integral idiopathic scoliosis three dimensional model was established by geometry clear technology. Nail guide target of thoracic vertebra was established on vertebral model by design module in Mimics 16.0 software. The point cloud form of three dimensional model was imported into Geomagic Studio 11.0 software. Series of image processing of model were conducted. At last, three dimensional model was imported into ANSYS 14.0 finite element analysis software in order to build finite element model with biological properties.
RESULTS AND CONCLUSION: Complete Lenke 3 type adult idiopathic scoliosis three dimensional finite element model was established successfully. It concluded 440 975 tetrahedron units and 580 bar units, totally 441 555 units and 1 077 318 nodes. Totally 12 nail guide target models of thoracic vertebra were established, including 4 682 tetrahedron units and  7 390 nodes. Lenke 3 type adult idiopathic scoliosis three dimensional finite element model and nail guide target of thoracic vertebral model with a realistic appearance were established successfully in this experiment. These results confirm that Lenke 3 type adult idiopathic scoliosis three dimensional finite element model provides scientific basis for further biomechanical experiments. Meanwhile, the construction of nail guide target model of thoracic vertebra provide a new scientific method for thoracic pedicle screw placement.  

中图分类号: