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Table 3 Dynamic axial compression bending testing

From: A new lumbar posterior fixation system, the memory metal spinal system: an in-vitro mechanical evaluation

Memory Metal Spinal System
Specimen Load (N) Cycles to failure (n) Failure mode
1 198 5000000 No observed failure
2 237 5000000 No observed failure
3 237 5000000 No observed failure
4 269 771901 Superior screws rotate inferiorly about superior transverse bridge
5 296 500 Superior screws rotate inferiorly about superior transverse bridge
6 355 250 Superior screws rotate inferiorly about superior transverse bridge
MOSS Miami
Specimen Load (N) Cycles to failure (n) Failure mode
1 160 5000000 No observed failure
2 170 5000000 No observed failure
3 172 80000 Screw head/shank interface
4 175 134537 Screw head/shank interface
5 180 90811 Screw head/shank interface
6 220 44251 Screw head/shank interface