USS Variable Axis Screw, additional lengths and diameters
The Variable Axis Screw (VAS) is a polyaxial side-opening pedicle screw used in conjunction with the Universal Spine System (USS). The screw/rod assembly adapts to the anatomy before being locked at a vien angle. The polyaxial flexible screw heads enable easy insertion of the pre-bent rods. The double thread with high thread pitch makes screw insertion quicker.
The existing Variable Axis Screws fort the Universal Spine System (USS) are now available in additional diameters and lengths for varying body types and larger sizes: the 4.2 mm diameter VAS in lengths from 2540 mm, the 5.2 and 6.2 mm VAS in 25 mm length, the 7.0 and 8.0 mm VAS in lengths from 25100 mm, and the 9.0 mm VAS from 70100 mm lengths.
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