From: Decompressive cervical laminectomy and lateral mass screw-rod arthrodesis. Surgical analysis and outcome
Screw position assessed by CT scan
(number: 785 )
number%
appropriate obtain
765
97.5
Violation of foramen transversarium by less than 1 mm.
7
0.8
Breaching of neural foramen
5
0.6
Entering the spinal canal
0
Violation facet joint
8
1.1