Table 2 Fusion measured on computed-tomography scans using the Bridwell grade
Bioactive glass | Autologous bone | ||||||||
|---|---|---|---|---|---|---|---|---|---|
Initial cohort | No posterior instrumentation | Posterior instrumentation | Initial cohort | No posterior instrumentation | Posterior instrumentation | ||||
n (%) | n (%) | n (%) | p-value* | n (%) | n (%) | n (%) | p-value* | p-value** | |
Bridwell grade at any level (n = 58) | 0.120 | 0.060 | 0.416 | ||||||
I | 30 (52%) | 11 (19%) | 19 (33%) | 23 (40%) | 11 (19%) | 12 (21%) | |||
II | 26 (45%) | 8 (14%) | 18 (31%) | 33 (57%) | 8 (14%) | 25 (43%) | |||
III | 2 (3%) | 2 (3%) | 2 (3%) | 2 (3%) | |||||
IV | |||||||||
Bridwell grade at L5-S1 (n = 40) | 0.755 | 0.339 | 0.262 | ||||||
I | 21 (53%) | 9 (23%) | 12 (30%) | 16 (40%) | 8 (20%) | 8 (20%) | |||
II | 19 (48%) | 7 (18%) | 12 (30%) | 24 (60%) | 8 (20%) | 16 (40%) | |||
III | |||||||||
IV | |||||||||
Bridwell grade at L4-L5 (n = 18) | 0.120 | 0.007 | 0.779 | ||||||
I | 9 (50%) | 2 (11%) | 7 (39%) | 7 (39%) | 3 (17%) | 4 (22%) | |||
II | 7 (39%) | 1 (6%) | 6 (33%) | 9 (50%) | 9 (50%) | ||||
III | 2 (11%) | 2 (11%) | 2 (11%) | 2 (11%) | |||||
IV | |||||||||