Regular reduction polyaxial screw
A regular reduction polyaxial screw is a pedicle screw with a movable (polyaxial) head and an extended reduction tower, used in spinal fixation systems to facilitate easier rod alignment and gradual reduction of the spinal rod into the screw head during spine surgery.
A regular reduction polyaxial screw is a specialized orthopedic implant used in spinal instrumentation systems to stabilize and align the vertebral column. It combines two important features: a polyaxial (movable) screw head and an extended reduction head or tower. The polyaxial design allows the screw head to move in multiple directions through a ball-and-socket joint, making it easier to align the screw with spinal rods inserted at different angles.
The reduction feature includes a longer screw head or tower that helps surgeons gradually pull or guide the spinal rod into the screw head, especially when the rod is positioned above the screw due to spinal deformity or difficult alignment. Once the rod is correctly seated, a locking cap or set screw is tightened to secure the construct.
These screws are usually manufactured from biocompatible materials such as titanium alloy or stainless steel, providing high strength, corrosion resistance, and compatibility with the human body. The screw shaft is inserted into the vertebral pedicle, anchoring firmly in the bone while allowing flexibility during rod placement.
Regular reduction polyaxial screws are widely used in spinal fusion surgeries, deformity correction procedures, and trauma stabilization, where both ease of rod placement and strong spinal fixation are required.
3. Key Features
- Polyaxial (movable) head allowing multi-directional adjustment.
- Ball-and-socket joint between the head and screw shaft.
- Extended reduction tower/head to assist in rod reduction.
- Facilitates easier rod alignment and placement.
- Threaded shaft for secure fixation in the vertebral pedicle.
- Compatible with spinal rods and locking caps.
- Made from biocompatible materials such as titanium alloy or stainless steel.
- Available in multiple sizes and lengths for different spinal levels.
4. Applications
- Spinal fusion surgery for stabilizing vertebrae.
- Correction of spinal deformities such as scoliosis and kyphosis.
- Treatment of spinal fractures and trauma.
- Degenerative spine disease stabilization.
- Complex spinal instrumentation procedures requiring easier rod placement and reduction.
- Orthopedic and neurosurgical spinal stabilization procedures.
