Classification | At the end of distraction phase | At the time of ex-fix removal | ||||
---|---|---|---|---|---|---|
LIPUS group (N = 30) | Control group (N = 30) | P-value* | LIPUS group (N = 30) | Control group (N = 30) | P-value* | |
Callus shape | Â | Â | 0.005 | Â | Â | 0.055 |
 Fusiform | 0 | 0 |  | 4 | 3 |  |
 Cylindrical | 19 | 13 |  | 23 | 15 |  |
 Concave | 11 | 8 |  | 3 | 10 |  |
 Lateral | 0 | 9 |  | 0 | 2 |  |
 Central | 0 | 0 |  | 0 | 0 |  |
Callus type |  |  | <  0.001 |  |  | 0.313 |
 Normal-density | 0 | 0 |  | 30 | 29 |  |
 Intermediate-density | 24 | 4 |  | 0 | 1 |  |
 Low-density | 6 | 26 |  | 0 | 0 |  |