The Mechanisms of Medial Pedicle Wall Violation: Insertion Method Is as Important as Correct Cannulation of the Pedicle

Table 2

Distribution of results in the “free drive” and the “push drive” groups.

Complications	Push drive; (%)	Free drive; (%)	Total; ( = %)
Pedicle fissure or wall defect	28 (%56)	1(%2)	29
Screw leaning	0 (%0)	8 (%16)	8
Intact pedicle	22 (%44)	41 (%82)	63
Total	50	50	100