(PLIF ) is also called Posterior Lumbar Inter body fusion. The PLIF procedure involves placing two small bone graft spacers, with gentle retraction of the spinal nerves and neurologic structures, one graft on each side of the interbody space. In this treatment the intervertibral disc is removed and replaced with a bone spacer. The procedure favors posterior technique when one or two spinal levels are being fused in conjunction with a posterior decompression and use of metal screws/rods.