Reported occurrence of bone posterior to interbody cages.
| Joseph & Rampersaud22 | Haid, et al26 | Lauweryns & Raskin | |||
|---|---|---|---|---|---|
| rhBMP-2 | Autograft | rhBMP-2 | Autograft | ABM/P-15 | Autograft |
| n = 23 | n = 10 | n = 32 | n = 31 | n = 45 | n = 45 |
| 21% | 8% | 75% | 13% | 48% | 14% |
| Minimal | 23% | 8% | |||
| Mild | 22% | 6% | |||
| Moderate | 3% | 0% | |||