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Table 2 Print deviation, plate and screw alignment and bone fragment positioning errors

From: Fixation of pelvic acetabular fractures using 3D-printed fracture plates: a cadaver study

 

Print deviation

Plate and screw alignment

Bone fragments

RMSplate_all (mm)

RMSplate_bone (mm)

Tplate (mm)

Rplate (°)

θscrew mean, range (°)

Nfrag

Tbone mean, range (mm)

Rbone mean, range (°)

RMSacet (mm)

Case 1 medial

0.28

0.29

3.54

1.58

5.78, 1.75–8.74

2

1.54, 0.81–2.27

3.68, 1.13–6.22

1.74

Case 1 lateral

0.47

0.37

1.74

4.90

6.20, 0.73–12.95

Case 2

0.46

0.49

5.66

8.51

6.96, 2.21–14.28

8

3.81, 2.84–5.05

5.76, 3.36–12.08

2.67

Case 3

0.13

0.10

7.49

5.73

2.77, 1.05–6.34

8

4.26, 1.68–6.33

7.95, 4.05–14.25

2.36

Case 4

0.17

0.13

13.00

7.69

6.34, 1.01–20.26

14

4.76, 3.43–5.8

10.95, 2.12–19.39

3.01

Case 5

0.26

0.26

5.12

8.51

7.28, 1.11–13.28

5

3.62, 0.4–7.23

8.59, 1.81–17.66

1.38

  1. RMSplate_all root-mean-squared printing error of all plate surfaces; RMSplate_bone root-mean-squared printing error of plate surface contacting bone; Tplate translation resultant for plate misalignment; Rplate rotation resultant angle for plate misalignment; θscrew screw angulation error; Nfrag total number of bone fragments; Tbone translation resultant for bone fragment misalignment; Rbone rotation resultant angle for bone fragment misalignment; RMSacet root-mean-squared deviation between pre- and post-operative acetabular surfaces