A Finite Element Study to Evaluate the Biomechanical Effect of Dynesys Spinal System on the Adjacent Segment in Lumbar Spine

• Main Authors: Ke-ChuanChen, 陳科銓
• Other Authors: Hsuan-Teh Hu
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/20166510995890258099

碩士 === 國立成功大學 === 土木工程學系碩博士班 === 98 === There are many tapes of surgery for different etiology of lumbar vertebra, in this study; we will focus on the evaluation of effect that Dynesys spinal system compares with PLIF surgery implemented with pedicle screw system. In the recent years, some clinical researches reported that the adjacent parts of fused vertebra segment would degenerate faster due to the much more stiffening of the fusion segment oPLIF surgery. So the purpose of this study is to compare the Dynesys Spinal System compares with PLIF surgery to dentify the mean factor affecting the adjacent parts of the fusion segment. In the construction of the finite element model, this study use Computer Tomography to export the DICOM file, use 3DDoctor medical software to create the boundary of the vertebral CT slice, and output the surface only file called STL file to MSC.PATRAN, setup the pre-processing step of the finite element analyses in MSC.PATRAN, finally export the input file for ABAQUS to solve the model. It indicates that the Dynesys Spinal System on the adjacent segment in lumbar spine would raise the rotational displacement and reduce the strain energye, but it shows that the effect of reducing stress for the Dynesys Spinal System is not regular.