Comparative Study of Sham Versus Mild® Procedure in Patients Diagnosed With Symptomatic Lumbar Central Canal Stenosis

Inclusion Criteria: * Symptomatic and lumbar spine stenosis (LSS) primarily caused by dorsal element hypertrophy. * Prior failure of conservative therapy and Oswestry Disability Index (ODI) Score of \>20%. * Radiologic evidence of LSS, ligamentum flavum hypertrophy (typically \> 2.5mm)confirmed by pre op MRI and/or CT. * Central canal cross sectional area clearly reduced per MRI/CT report. * If present, anterior listhesis ≤ 5.0mm (preferred) and stable. * Able to walk at least 10 feet unaided before being limited by pain. * Available to complete 26 weeks of follow-up. * A signed Informed consent Form is obtained from the subject. * Adults at least 18 years of age. Exclusion Criteria: * Prior surgery at intended treatment level. * History of recent spinal fractures with concurrent pain symptoms as determined by the Investigator. * Disabling back or leg pain from causes other than LSS (e.g. acute compression fracture, metabolic neuropathy, or vascular claudication symptoms, etc.). * Disk protrusion or osteophyte formation severe enough to confound study outcome. * Facet hypertrophy severe enough to confound study outcome. * Bleeding disorders and/or current use of anti-coagulants. * Use of acetylsalicylic acid (ASA) and/or non-steroidal anti-inflammatory (NSAID) within five days of treatment. * Epidural steroid administration within prior 3 weeks(of procedure or sham) * Inability of the subject to lie prone for any reason with anesthesia support (e.g. chronic obstructive pul…