[b]hi Everyone I'm New Here. I Was Wondering If Someone Can Help Me. I Have Had Spondylolisthesis For 25 Years Had Plif L5 S1 Surgery 5 Years Ago. Now Pain Is Back Had A Xray And It Says One Of My Lower Screws Appears To Be Beyond The Ventral Cortex. Post Operative Changes Seen. My Nuerologist Putting Me Off. Any Input Appreciated