| Summary: | 碩士 === 國立成功大學 === 土木工程學系碩博士班 === 100 === The elderly generally have symptoms of osteoporosis, compression fractures caused by osteoporosis is a growing trend with Taiwan to become an aging society.
In the present study, less attention to the study of osteoporosis patients received surgical treatment for thoracolumbar fractures for osteoporosis patients receiving surgery, including Vertebroplasty or Posterior Spinal Fixation, various operation would have the spine have different mechanical performance. In order to understand the Biomechanics for Osteoporotic Thoracolumbar Vertebral Fracture after surgery, we use finite element software Patran, ABAQUS to analyze and consider different control variables such as different materials for bone cement(PMMA ,CPC), the location where bone cement inject, the effect of implanting pedicle screws or not. Use these to analyze the effects in Biomechanics.
CT scans used in this study to establish the spine module, in the lumbar part of Section 1 (L1), take the position of the middle half, weakening the material parameters of cancellous bone and cortical bone for the tenth to simulate the case of fracture of the lumbar section I. Also, we established pedicle screw system with screw thread, and we use FEM software Patran to insert pedicle screw into T12 and L2 segments.
Finally, stress in the pedicle screws , stress in the segments near L1 fracture, spinal stabilities and ROM under four motions(Flexion, Extension, Lateral Bending and Rotation) were compared.
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