From: Intraarticular bone grafting in atlantoaxial facet joints via a posterior approach: nonstructural or structural—a minimum 24-month follow-up
BI
Grafting
n
Successful maintenance
Unsuccessful maintenance
p value
No
NS
15
11 (73.33%)
4 (26.67%)
0.530
S
4
4 (100%)
0 (0)
Yes
9
1 (11.11%)
8 (88.89%)
0.023
5
4 (80%)
1 (20%)