The Poly Sacral Screw XL Single Lock is a specialized orthopedic screw used in spinal fixation systems, primarily for securing the sacrum or lumbar vertebrae. It is a polyaxial (or multi-axial) screw, meaning the screw head (which accepts the rod) can angulate relative to the screw shaft . This flexibility allows the surgeon to more easily connect the screw head to a spinal rod, especially in anatomically complex areas like the sacrum. The “XL” suggests a robust design, and the “Single Lock” refers to the mechanism used to secure the rod within the screw head.

Key features include:

• Polyaxial (Swiveling Head): Allows the head to angle relative to the shaft, simplifying rod placement and connection.

• XL Size: Indicates suitability for robust fixation in the sacrum or denser vertebral bodies.

• Primary Use: Used in fusion procedures for the lumbar spine and sacrum (L5-S1 fixation) where angular correction is beneficial.

• Cancellous Thread: Features deep, aggressive threads for excellent purchase in cancellous bone (as implied by the “Sacral Screw” use).

• Code Structure: Sizes are available in 4.5mm, 5.5mm, and 6.5mm diameters.