The Poly Sacral Screw XL Single Lock-Dual Thread is a specialized orthopedic screw used in spinal fixation systems. It is primarily used for securing the sacrum or lumbar vertebrae where maximum stability and pull-out resistance are required. This screw features a Polyaxial (multi-axial) head, allowing the screw head to swivel relative to the shaft, which greatly simplifies the alignment and connection of the spinal rod. The differentiating feature is the Dual Thread design, which provides superior anchorage in the cancellous bone of the vertebral body. The “XL” suggests a robust design suitable for high-load applications.

Key features include:

• Dual Thread Design: Offers improved pull-out resistance and purchase, especially beneficial in compromised bone quality.

• Polyaxial (Swiveling Head): Simplifies rod placement and connection by allowing the head to angle relative to the shaft.

• XL Size: Indicates robust design for high-load spinal fixation areas.

• Primary Use: Used for fusion procedures, particularly in the lumbosacral region (e.g., S1 fixation).

• Code Structure: Available in 4.5mm, 5.5mm, and 6.5mm diameters.