The XC Medico Monoaxial Pedicle Screw is used in posterior thoracolumbar and lumbar spinal fixation. Its fixed-angle head gives a rigid, single-axis screw-rod connection once the construct is locked. This suits spinal trauma cases, such as fractures needing firm fixation. It also suits spinal deformity correction, such as scoliosis and kyphosis. Strong corrective forces can be applied through the construct in these cases. Degenerative spine conditions and revision surgery can also call for the added rigidity of a monoaxial screw over a polyaxial design. Surgeons choose diameter and length based on pedicle width and vertebral body depth on preoperative imaging. They then pick a monoaxial or polyaxial head design based on the case's need for angulation versus rigidity.
