Vertos Mild - Post Market Patient Outcomes

Inclusion Criteria: * Symptomatic and lumbar spinal stenosis caused by dorsal element hypertrophy * Prior failure of conservative therapy and Oswestry Disability Index (ODI) \>20% * Radiologic evidence of lumbar spinal stenosis, ligamentum flavum hypertrophy (typically \>2.5mm),confirmed by pre-op MRI/CT report * Central canal cross sectional area clearly reduced per MRI/CT report * If present, anterior listhesis \< or = to 5.0mm (preferred) and deemed stable by the Investigator * Able to walk at least 10 feet unaided before being limited by pain * Available to complete 26 weeks of follow up * A signed Consent Form is obtained from the patient * Adults 18 years of age or older Exclusion Criteria: * Prior surgery at the intended treatment level * Compound fracture with intraspinal retropulsion contributing to spinal stenosis * Disabling back or leg pain from causes other than lumbar spinal stenosis * Disc 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 drug (NSAID) within 5 days of treatment * Epidural steroids with 3 weeks prior to procedure * Inability of patient to lie prone for any reason with anesthesia support * Metabolic wound healing pathologies that may be deemed by the Investigator to compromise the study outcomes * Dementia and/or inability to gi…