Table 1 Age distribution for the control, tooth-borne, and bone-anchored protraction facemask groups
Control | Tooth-borne protraction facemask | Bone-anchored protraction facemask | |||||||
|---|---|---|---|---|---|---|---|---|---|
t0 | t1 | Diff | t1 | t2 | Diff | T1 | T2 | Diff | |
Mean | 9.0 | 9.8 | 0.8 | 9.7 | 10.5 | 0.8 | 9.8 | 10.4 | 0.6 |
SD | 1.8 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.2 | 1.2 | 1.2 |
Min | 6.1 | 6.9 | 6.90 | 7.11 | 8.0 | 9.0 | |||
Max | 12.7 | 13.2 | 13.2 | 14.1 | 12.0 | 13.0 | |||