Clinical Study to Evaluate the Anti-adhesion Efficacy and Safety of MegaShield®-SP in Comparison With Guardix-SP Plus After Spine Surgery

Inclusion Criteria: * Patients aged 20 to 70 years. * Patient diagnosed with single-level lumbar disc herniation and scheduled to perform Lumbar discectomy, or patients diagnosed with single-level spinal stenosis and scheduled to perform laminectomy. * Patients who voluntarily decide to participate in the study and voluntarily agree in writing to the informed consent form. Exclusion Criteria: * Patients diagnosed with multi-level lumbar disc herniation or lumbar disectomy ,far lateral lumbar disc herniation(FLLDH). * Patient diagnosed with spinal cord disease * Patient who needs spinal fusion * Patient who has previous experience in spinal surgery * Patient diagnosed with a serious liver or kidney disease * Patients with lymph fluid or blood clotting disorder or taking antithrombotic or antiplatelet agents * Patients with uncontrolled diabetes that may affect surgery or postoperative progress according to the investigator's judgment, * Patients with immunocompromised or autoimmune diseases such as rheumatoid arthritis or systemic erythematosus lupus, and severe systemic immune disease * Patients with infectious diseases or healing disorders that can interfere with the normal healing process after surgery * Patients who received steroid epidural injections within 2 weeks from the date of screening or who took oral steroids within 24 hours * Patients who participated in other clinical trials within 30 days from the date of screening * Patients who are unable to take MRI scan…