COMPARING POSTERIOR LUMBAR INTERBODY FUSION AND TRANSFORAMINAL LUMBAR INTERBODY FUSION IN MANAGING LUMBAR SPONDYLOLISTHESIS: A RETROSPECTIVE ANALYSIS

Unstable lumbar spondylolisthesis (ULS) is a leading cause for spinal surgery, requiring methods that both decompress neural structures and restore stability through fusion. Since lumbar spinal stenosis (LSS) was first categorized by Arnoldi et al. in 1976, multiple studies have evaluated ULS and other spinal conditions, showing that LSS remains a primary reason for spinal surgeries in adults over 65, despite a lack of standardized diagnostic criteria. The occurrence of such surgeries has increased significantly, with statistics indicating a rise from 10-15 per 100,000 to 30-35 per 100,000 over the past decade in some countries.