Fig. 1
From: A novel Z-shaped anti-rotation rod for atlantoaxial dislocation reduction: finite element analysis
Appearance of novel Z-shaped rod and schematic of lever reduction principle. 1 A. Comparison of common rod and new Z-shaped anti-rotation rods of different specifications with height intervals of 2 mm from 0 to 8 mm in sequence (black A represents the end with a “D”-shaped cross-section, black C represents the end with an “O”-shaped cross-section, and black B represents the connecting part). 1B. The Z-shaped rod increases the height difference between the atlas and axis, leveraging the lever principle to lift the atlas and achieve reduction