Percutaneous anterior C1/2 transarticular screw fixation: salvage of failed percutaneous odontoid screw fixation for odontoid fracture

Table 1 The details of the included patients

	Salvage patients N = 15	Non-salvage patients N = 93	P
Operative time (min)	53 ± 15	41 ± 19	< 0.001
Gender
Male	12	68	0.805
Female	3	25
Cause of injury
Vehicle accidents	9	64	0.704
Falls	6	29
Anderson and D’Alonzo classification
Type II	11	72	0.985
Type III	4	21
Grauer classification
Type II A	0	7	< 0.001
Type II B	3	64
Type II C	8	1

ISSN: 1749-799X