The Axon System is designed for posterior stabilization of the upper spine taking into account the variations of patient anatomy. A posterior fusion and stabilization procedure is often used to treat instabilities secondary to traumatic injury, rheumatoid arthritis, ankylosing spondylitis, neoplastic disease, infections and previous laminectomy. The Axon System is based on the CerviFix/StarLock System. This allows an extension of a construct from the occiput to the lower spine using the Universal Spine System (USS).
The top-loading screws have a poly-axial head allowing an angulation of 30 based on the locking system of the Variable Axis Screw System. The self-tapping screws are available as 3.5 and 4.0 mm cancellous screws from 826 mm thread lengths and as 3.5 mm cortex screws from 2850 mm lengths. They can be used as lateral mass and transpedicular screw.
3.5 mm and 4.0 mm screws (2850 mm thread lengths)
Additional lengths of the 3.5 and 4.0 mm Axon screws in cancellous thread profile are available. The system now provides screws from 8 to 50 mm lengths in 2 mm increments to accommodate varying patient anatomy and different surgical techniques.
The Transverse Bar eases construct assembly if the screws are not inserted in line due to anatomical requirements. It provides a lateral offset of up to 9 mm from the 3.5 mm rod to the screw. It eliminates the need for severe rod contouring.The preassembled Transconnector to lock the assembly is placed after the Axon construct is in position. Bushings allow the clamps to be placed offset to each other.
The improved hooks for sublaminar insertion offer a wider hook opening. The offset between rod and hooks has been reduced. The instruments of the CerviFix set has been redesigned featuring an Adjustable Drill Guide, Pedicle Preparation Set, Bone-Screwdriver with Holding Sleeve, Alignment Tool, Torque Limiting Handle for Locking Screw, Rod Pusher/Countertorque, and Distraction and Compression Forceps.
2.4 mm K-wire with stop
The 2.4 mm K-wire with stop is for surgeons who prefer a K-wire approach instead of the standard drill bit procedure.
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