Table 5.

The anatomical pedicle angles and the screw trajectory angles in all vertebrae

	Mean (°)	Range (°)
C2
APA	29.8	27–33
STA	16.9	12–22
C3
APA	41.8	34–56
STA	27.4	15–45
C4
APA	46.0	33–58
STA	28.9	16–45
C5
APA	45.6	39–64
STA	28.7	14–44
C6
APA	41.7	30–54
STA	28.9	9–41
C7
APA	27.0	21–34
STA	24.3	15–49

APA anatomical pedicle angle, STA screw trajectory angle