[Comparative biomechanical studies following automated percutaneous nucleotomy and diskotomy].

APLD is considered as the last step of conservative treatment for lumbar disc herniation assuming that a negative biomechanical effect of APLD is not expected. Biomechanical effects of APLD were investigated in comparison to open discectomy. APLD decreased disc height less than open discectomy and increased instability and flexibility less. The position of the center of rotation was not significantly altered.