Help, 2006 failed L5-L4 fusion, non instrumented, autologus bone. 2008 MISS L5-L4 with PEEK dynamic stabilization L4-L3 and cadaver bone. Extreme pain began 2 -3 mo. post op. Characterized by pain initiated when rising from a supine or fetal position, or when exiting a hot tub or pool. CAT/MRI/X-rays show no overt abnormalities. Pain radiating over left hip maybe unrelated to this extreme central pain. Facet blocks relieved some pain, but not central pain. Help! :''( Has anyone else experienced this?