Inclusion Criteria:  Age between 18 and 75 years Patients affiliated to a social security system. Informed, dated and signed consent ASA 1 or 2 Patient compliant and adhering to protocol visits Indication for a 1-level mini-invasive lumbar arthrodesis performed by anterior or posterior approach Failure of conservative treatment for more than 3 months  Exclusion Criteria:  History of lumbar arthrodesis Active neoplasia History of osteoporotic fractures of the spine Arthrodesis superior to 1 level Intolerance or contraindication to morphine treatments Respiratory insufficiency Preoperative anticoagulant treatment Contraindication to the ambulatory care: patient living alone at home, or at a distance from the establishment, and thus requiring a follow-up care and rehabilitation hospitalization Patient with a body mass index of greater than 40 kg/m². Patient with a fever (>38°C) Suspected or known allergy or intolerance to the materials used and requiring a combination of different metals. Patient with a contraindication to the material used or for whom the use of the implant could interfere with their anatomical structures or expected physiological function. Pregnant or breastfeeding women Patient participating to an ongoing study that may interfere with the present study Patient under legal protection