Spontaneous correction of the sagittal balance of the spine after decompressive surgery for degenerative lumbar stenosis

ACKGROUND: Correction of sagittal imbalance in patients with degenerative spine conditions is typically achieved through corrective decompressing- stabilizing procedures that restore angular relationships in the spine. In some cases, however, surgeons have observed an improvement in both regional and overall balance after isolated decompressions. The question that remains is what mechanisms and factors contribute to the spontaneous correction of sagittal alignment after lumbar decompression surgery.AIMS: to determine changes in the sagittal profile of the spine after decompression surgery in patients who have undergone decompression surgery for degenerative lumbar stenosis.MATERIALS AND METHODS: prospective observational study of 96 patients who underwent microsurgical decompression for degenerative lumbar stenosis at all clinically signifi ant levels. Clinical and radiological outcomes were assessed by measuring various parameters of the sagittal profile, such as Pi, Pt, SS, low LL, LL, SVA, and Barrey index, both before and 6 months after surgery.RESULTS: In the postoperative period, a signifi ant increase in lower lumbar lordosis LowLL (L4-S1) (p=0.03), an increase in segmental angles L2-L3, L3-L4, L4-L5, L5-S1 (p