Table 4 Comparison of the malposition of screws using CT photographs according to Hojo’s method.

From: Three-Dimensional Printed Model-Assisted Screw Installation in Treating Posterior Atlantoaxial Internal Fixation

Group

Grade 0

Grade 1

Grade 2

Total

P value

Group A

206

96

2

304

0.003£

Group B

219

29

0

248

Total

425

125

2

552

  1. £P < 0.05 compared to the data of Group A.
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