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Table 1 Results of screw placement in various lumbar spine segments

From: Double-trajectory lumbar screw placement guided by a set of 3D-printed surgical guide templates: a cadaver study

Lumbar vertebral body Screw placement results Grade 0 (%)
Grade 0 Grade 1 Grade 2 Grade 3
L1 17 4 3 0 70.8%
L2 19 4 1 0 79.2%
L3 20 4 0 0 83.3%
L4 22 1 1 0 91.7%
L5 21 2 1 0 87.5%
Total 99 15 6 0 82.5%