From: Repair of symptomatic bilateral L5 spondylolysis with autogenous iliac crest graft and temporary intersegmental pedicle screw fixation in youth
Time (postop)
Type I
Type II
Type III
6 months
86.1% (31/36)
7.1% (9/126)
3.1% (1/32)
9 months
100.0% (36/36)
43.7% (55/126)
9.4% (3/32)
12 months
84.1% (106/126)
53.1% (17/32)
24 months
96.8% (122/126)
78.1% (25/32)