Study of a Bone Assessment Technique, Bone Mineral Analyser, Concerning the Prediction of Improvement in Bone Status After an Infusion of Zoledronic Acid in Osteoporotic Women

Inclusion Criteria: * Women \< 85 years old * Postmenopausal women (amenorrhea for more than 12 months), a confirmation diagnosis should be obtained (amenorrhea for at least 12 months before the inclusion visit). * Post-menopausal osteoporosis with one or more severe fractures (upper end of the humerus, femur, or tibia; 3 adjacent ribs; lower end of the femur; thoracic or lumbar spine; pelvis), or T score \<-3 which justifies setting up a bisphosphonate treatment * Affiliated to social security Exclusion Criteria: * Contraindication to zoledronic acid (allergy to the product, creatinine clearance \<35 ml / min, hypocalcemia, open and unhealed lesions of the soft tissues of the mouth) * Hormone replacement therapy taken in the last 12 months * Osteoprotective treatment (bisphosphonates, teriparatide, raloxifene, strontium ralenate or denosumab) taken in the last 12 months * Secondary osteoporosis: hyperthyroidism, hyperparathyroidism, long-term corticosteroid therapy, hypercorticism, hypogonadism, treatment with anti aromatases / LHRH analogues, neoplastic pathology (solid or hemopathy) * History of bilateral wrist or femur fracture * Person deprived of liberty by an administrative or judicial decision or person placed under the protection of justice / guardianship or curatorship * Patient participating in another trial / having participated in another trial within 6 months