Table 5.
Fusion outcomes based on the presence of bone fibers and carrier material
| No fibers (n=54), n (%) | Fibers present (n=169), n (%) | P a | |
|---|---|---|---|
| Bone bridging fusion | |||
| Yes | 45 (83.3) | 152 (89.9) | 0.283 |
| No | 9 (16.7) | 17 (10.1) | |
| Screw fusion | |||
| Yes | 50 (92.6) | 152 (89.9) | 0.754 |
| No | 4 (7.41) | 17 (10.1) | |
| Cobb fusion | |||
| Yes | 51 (94.4) | 147 (87.0) | 0.206 |
| No | 3 (5.56) | 22 (13.0) | |
| Combined fusion | |||
| Yes | 41 (75.9) | 126 (74.6) | 0.983 |
| No | 13 (24.1) | 43 (25.4) | |
|
| |||
| No carrier (n=94), n (%) | Carrier present (n=129), n (%) | P a | |
|
| |||
| Bone bridging fusion | |||
| Yes | 85 (90.4) | 112 (86.8) | 0.537 |
| No | 9 (9.57) | 17 (13.2) | |
| Screw fusion | |||
| Yes | 82 (87.2) | 120 (93.0) | 0.219 |
| No | 12 (12.8) | 9 (6.98) | |
| Cobb fusion | |||
| Yes | 80 (85.1) | 118 (91.5) | 0.203 |
| No | 14 (14.9) | 11 (8.53) | |
| Combined fusion | |||
| Yes | 67 (71.3) | 100 (77.5) | 0.365 |
| No | 27 (28.7) | 29 (22.5) | |
aBone fusion - radiopacity uniting the transverse processes on AP radiograph; screw fusion - lack of >2 mm of osteolysis surrounding at least two screws or visible instrumentation failure; cobb fusion - segmental lordosis difference of <5° between flexion and extension; combined fusion - if any of bone bridging, screw fusion, cobb fusion criteria were not met