Anatomical Study On The Interspinous Region And Three-dimensional Finite Element Analysis Of Interspinous Internal Fixation Of Lumbar Spine

With the improvement of recognition for lumbar diseases and lumbar intervertebral disc herniation, and the development of surgical technology, the application of lumbar spinal fusion surgery becomes more and more popular. All sorts of potential complications, including all kinds of pathologic changes of the adjacent segments of the fused vertebral bodies, namely the degeneration of the adjacent segments, are making people attach more and more importance to. The fusion fixation makes the relevant spinal segments lose motor function. Interpyramidal activity increases vicariously because of the overload of adjacent segments, which leads to stress concentrating on adjacent intervertebral disc and zygapophysis, and then the transition syndrome takes place, secondary spinal stenosis and degeneration or slippage of zygapophysial joints follow up.The non-fusion system deriving from the shortcomings of fusion fixation, is called dynamic fixation system(dynamic stabilization device,sofa stabilization) as well. The so-called dynamic fixation system is the internal fixation system which maintains the motion of the mobile segment of spine and change the load transmission without bone graft fusion. The purpose is to change the way of mobile segment bearing load, to control the intersegmental abnormal movement, this means that dynamic fixation could anises pain and prevent degeneration of adjacent segments by means of controlling abnormal movement and letting more physiological load transmission. Nowadays, no-fusion fixation includes transpedicular fixation(such as Grach ligament of assisting pedicle of vertebral arch),interspinous fixation (such as Wallis system) and fixation between vertebral bodies(such as intervertebral disc arthroplasty).However, there is no systematic and further study for all these no-fusion fixations, as for whether they are suitable for Chinese men and the influence on the spinal biomechanics post-implanting.In this study, according to the anatomical features of interspinous region of lumbar...