Intervertebral spacer: indicated for posterior fixation surgery and intervertebral arthrodesis, for the treatment of lumbar and lumbosacral pathologies of the vertebral column where the intervertebral arthrodesis procedure is indicated, whether degenerative, traumatic, congenital or other. . Indicated for cases of need for fixation, such as cervical intersomatic arthrodesis, mainly in acute disc disorders (hernias) and in degenerative pathologies with chronic and limited instability.