axialif手术路径的影像解剖学测量及轴向融合器的生物力学分析word格式论文.docxVIP

第二军医大学博士学位论文 第二军医大学博士学位论文 AxiaLIF AxiaLIF 手术路径的影像解剖学测量及轴向融合器的生物力学研究 - - PAGE 4 - - - PAGE 5 - Abstract Backgroud: The presacral axial L5 / S1 interbody fusion (AxiaLIF) is a new surgical method. It has already been in clinical use in recent years.Preliminary results showed good clinical efficacy.The relevant anatomy about presacral AxiaLIF approach has been studied abroad, Chinese people have made study of the anatomy and imaging measurements about presacral anatomy and the safety of surgical approaches. However, anatomical studies on AxiaLIF involves only L5 / S1 segments fusion. And these anatomical studies did not consider the actual size of the cage and the cage’s position of the lumbosacral segment, which leaves a certain gap in the practical application of clinical. While some patients in clinical practice are associated with L 4 / 5 and L5 / S1 lesions, it needs to fuse from L4 to S1. There are still no research reports about the integration surgical approach of axial lumbar fusion from L4 to S1with axial rod at home and abroad. Today basic research about axial rod is not perfect and the clinical application time of axial rod is short, so long-term outcome is not clear. Therefore, a comprehensive biomechanical evaluation, in particular, to clarify its biomechanical advantages have significant meaning to the clinical prognosis and minimally invasive lumbar fusion technology. Through imaging anatomy measurement about surgical approach of axial rod on AxiaLIF fusion and biomechanics of the comprehensive axial rod, this dissertation analyses Axial rod of AxiaLIF the feasibility of clinical application. Objective:1.To optimize the surgical approach for transsacral axial L5/S1 interbody fusion (AxiaLIF). 2. This study aimed to explore whether transsacral axial interbody fusion is a candidate for the fusion of both L4/5 and L5/S1. 3. Establish normal finite element model of lumbosacral vertebrae through software of three-dimensional finite element and model valid