Early Imaging Study On Effect Of Minimally Invasive Transforaminal On Lumbar Interbody Fusion On Lumbar Sagittal Alignment

Objective: The main purpose of this Subject is to study the effect of minimal invasive TLIF operation on the change of Sagittal parameters of lumbar vertebrae and investigate its clinical significance.Methods: By studying the Single segment minimally invasive TLIF on 156 patients with lumbar degenerative conditions collected from June 2009 to June 2013.Divided them into three groups: lumbar disc herniation(60 cases),lumbar spinal stenosis(40 cases),and lumbar spondylolisthesis(56 cases),all of them were aged43-65 years and single segment operation.In X-ray lateral radiographs,separately measured their height of intervertebral space(DH),lumbar lordosis(LL),pelvic incidence(PI),pelvic tilt(PT),sacral slope(SS),L1 axis and S1 distance(LASD).Then arranged the data and analyzed.Results: Sagittal parameters of lumbar vertebrae has no significant statistical difference between genders(P>0.05);2.Lumbar lordosis angle and intervertebral height increased significantly after Postoperative lumbar spondylolisthesis(P<0.05),Lumbar lordosis angle and intervertebral height increased compared with preoperative after Lumbar disc herniation and lumbar spinal stenosis(P<0.05);3.There is no obvious difference among PI、SS、LASD after three group operation(P>0.05).Conclusion: Minimally invasive TLIF in the early helps to improve and maintain the lumbar sagittal sequence analysis of P and T statistics and contrast angle LL after preoperative and postoperative X-ray 5 parameters,LL found that the most obvious improvement,PT,PI,SS,LASD is relatively obvious,surgical treatment of three diseases can sagittal balance.Minimally invasive TLIF has further clinical significance.