Effects of Cycle Therapy vs Sequential Therapy With Romosozumab and Denosumab in Postmenopausal Osteoporosis Patients

Inclusion Criteria: * 1\. Postmenopausal women aged 50-90 years * 2\. BMD T-score ≤ -3.0 at any lumbar vertebra * 3\. Physically and mentally capable of understanding and complying with the study protocol and follow-up * 4\. Signed informed consent Exclusion Criteria: * 1\. Previous osteoporosis treatment within the past two years, including Romosozumab, Teriparatide, Denosumab, Alendronate, Ibandronate, Zoledronic Acid, Risedronate, Raloxifene, or Bazedoxifene * 2\. Allergy to Romosozumab or Denosumab * 3\. Secondary osteoporosis * 4\. Autoimmune disease * 5\. Chronic steroid use (e.g., Chronic Obstruction Pulmonary Disease patients) * 6\. Hypercalcemia or hypocalcemia * 7\. Metabolic bone diseases * 8\. Primary or metastatic bone tumors * 9\. Cancer patients (except for in situ carcinoma and non-melanoma skin cancer, unless fully treated and in remission for five years) * 10\. Planned dental procedures (e.g., extractions, implants) within the next year * 11\. History of stent placement, myocardial infarction, stroke, or coronary artery disease * 12\. Renal disease (Creatinine \> 1.5 mg/dL) or dialysis patients * 13\. Smoking more than one pack per day (except for those who have quit for over ten years)