Ligamentoplasty in Lumbosacral Vertebrae using BOP

BOP is made of N-Vinyl pyrrolidone-Methylmethacrylate monomer, polyamide fibres, and calcium glusconate. BOP is biocompatible, biodegradable, and osteoconductive matrix, easy to use and quite safe. Authors have operated 14 patients who has bilateral hernaiated nucleus pulposus, multiple herniated nucleus pulposus, or herniated nucleus pulposus accompanied with spinal stenosis, spondylolysis or spondylolisthesis in lumbosacral portion from September, 1989 till August, 1990. The results were satisfactory. We analysed this patients and report the method of ligamentoplasty with the discussions about spinal fusion and spinal instability.