P value | Time interval after surgery (month) | Average changes in height of ridge height with allograft (mm) |
P < 0.05 | Immediately | 15.83 ± 1.89 |
P < 0.05 | 3 | 21.33 ± 1.53 |
P < 0.05 | 6 | 20.86 ± 0.76 |