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Table 3 Measurement data

From: 3D printing–assisted preoperative plan of pedicle screw placement for middle-upper thoracic trauma: a cohort study

Segment T1 T2 T3 T4 T5
Case α β ɸ L α β ɸ L α β ɸ L α β ɸ L α β ɸ L
1          19.5 10 3.5 30 16.5 10 3.5 30     
2          23.5 18 3.5 30 21 16 3.5 30 17.5 13 4 30
3 33 14 3.5 30 30.5 13 3.5 30 24.5 11 3.5 30 19 11 3.5 30     
4      28 13 3.5 30 22.5 13 3.5 30 17.5 11 4 30 15 11 4.5 30
5          20.5 16 3.5 30 16 15 3.5 30     
6                  11.5 15 4.5 30
7                  15.5 16 4 30
Segment T6 T7 T8 T9 T10
Case α β ɸ L α β ɸ L α β ɸ L α β ɸ L α β ɸ L
1 13 6 4.5 35 11 4 4.5 35             
2 15 11 4.5 35                 
3                     
4                     
5 11 6 4.5 35 10 5 4.5 35             
6 10 13 4.5 35          6.5 10 5 40 5 7 5.5 40
7 15 15 4.5 35      11 12 5 40 10.5 11 5 40     
  1. α, the measured inclined angle of the pedicle screw (in degree); β, the measured head-tilting angle of the pedicle screw (in degree); ɸ, the optimal diameter of the pedicle screw based on the 3D printing model (in mm); L, the optimal length of the pedicle screw based on the 3D printing model (in mm)