Radiographic Assessment Of Lumbosacral Angle Changes Undergoing Computer Navigated MIS-TLIF In Patients With Degenerative Spondylol Isthesis

PURPOSE:To evaluate the role of computer navigation MIS-TLIF in lumbosacral degenerative spondylolisthesis patients in correcting and restoring sagittal balance.METHODS:Lumbosacral angle in 40 degenerative spondylolisthes is patients who underwent L5/S1 or L4/5 computer navigated MIS-TLIF were studied by Ferguson’s method on lateral x-ray.Oswestry Disability Index(ODI)and VAS(visual analog score)were evaluated pre-operatively and post-operatively follow-up time.RESULTS:Lumbosacral angle of 40 patients who underwent computer navigated MIS-TLIF.Lumbosacral angle was reduced to 34.8±3.8 post-operatively as compare to pre-operative angle changes 47.9±4.2.VAS pain severity reduced from 7.8±1.7 at baseline to 3.2±0.7.Mean ODI scores also reduced from 60±15.1%at baseline to 23.2±9.3%(p<0.001).CONCLUSION:Computer navigated MIS-TLIF results in a significant restoration of lumbosacral angle thus maintain lumbar sagittal balance.The pat ients treated with this technique had improved in pain and disability.