Introduction: Unilateral biportal endoscopic unilateral laminotomy for bilateral decompression (UBE-ULBD) is a minimally invasive yet technically demanding procedure for lumbar spinal stenosis. This ...
Introduction: The unilateral biportal endoscopic (UBE) technique has been widely adopted for treatment of lumbar disc herniation and lumbar spinal stenosis. Understanding its learning curve, as well ...