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

doi:10.3969/j.issn.2095-4344.2015.53.012

Abstract

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.

中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程

CLC Number:

R318

Xin Da-qi, Huo Hong-jun, Hu Zhen-ming, Yang Xue-jun, Xing Wen-hua, Zhao Yan, Han Di. Construction of Lenke3 type adult idiopathic scoliosis finite element model and thoracic screw guide target 3D model[J]. Chinese Journal of Tissue Engineering Research, 2015, 19(53): 8597-8602.

Figures/Tables 1

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