Specifications and Testing for Spine Screws, Plates, and Rods
This standard describes the specifications and the static and fatigue bending test methods for spine screws, rods, and plates. Test set-up follows a four-point bend assembly for rods and plates. Spine screws follow a cantilever set-up. The fatigue strength of each spinal fixation component is determined by cycling to a run-out of 2.5 million cycles.
It is recommended that spine screws also be tested for torque strength, driving torque, and pullout resistance as described in ASTM F543.
