Table 4.
Comparison of changes during the long-term overall interval (T1–T3)—independent t-test (P < 0.05). SD, standard deviation.
| Variables | FR-2 (N = 17) | Control group (N = 17) | Difference | P value | ||
|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | |||
| Cranial base | ||||||
| Ba-S-N (°) | 1.5 | 1.7 | −0.4 | 3.1 | 1.9 | * |
| Maxillary A-P skeletal | ||||||
| SNA (°) | 0.2 | 1.4 | 0.9 | 1.7 | −0.7 | NS |
| A-Nperp (mm) | 1.6 | 1.4 | 0.9 | 1.8 | 0.7 | NS |
| Co-A (mm) | 6.2 | 2.6 | 5.7 | 2.9 | 0.5 | NS |
| Mandibular A-P skeletal | ||||||
| SNB (°) | 2.3 | 1.9 | 1.7 | 1.8 | 0.6 | NS |
| Pg-Nperp (mm) | 6.6 | 4.0 | 3.6 | 2.8 | 3.0 | * |
| Co-Gn (mm) | 15.2 | 4.3 | 11.5 | 4.3 | 3.7 | * |
| Intermaxillary | ||||||
| ANB (°) | −2.1 | 1.3 | −0.8 | 1.9 | −1.3 | * |
| Wits (mm) | −2.2 | 2.2 | 0.4 | 2.2 | −2.6 | ** |
| Mx/Md difference (mm) | 8.9 | 3.1 | 5.6 | 3.1 | 3.3 | ** |
| Vertical skeletal | ||||||
| FH-Palatal Pl. (°) | −0.9 | 1.8 | 0.8 | 2.0 | −1.7 | * |
| FH-Mand. Pl. (°) | −3.8 | 3.1 | −2.4 | 2.4 | −1.4 | NS |
| ANS-Me (mm) | 7.1 | 3.2 | 5.7 | 2.1 | 1.4 | NS |
| Interdental | ||||||
| Overjet (mm) | −3.7 | 2.0 | −0.3 | 1.3 | −3.4 | *** |
| Overbite (mm) | −2.0 | 1.4 | 0.2 | 1.6 | −2.2 | ** |
| I/I (°) | 1.7 | 7.2 | 2.4 | 7.3 | −0.7 | NS |
| 6/6 (mm) | 4.1 | 2.1 | 0.1 | 1.3 | 4.0 | *** |
| Maxillary dentoalveolar | ||||||
| U1-SN (°) | −0.7 | 5.7 | −0.1 | 4.0 | −0.6 | NS |
| U1-Avert (mm) | 0.5 | 1.9 | 0.5 | 1.6 | 0.0 | NS |
| U1H (mm) | 0.7 | 1.8 | 1.4 | 1.0 | −0.7 | NS |
| U1V (mm) | 2.3 | 1.3 | 1.2 | 1.2 | 1.1 | * |
| U6H (mm) | 3.2 | 1.9 | 3.8 | 1.5 | −0.6 | NS |
| U6V (mm) | 4.5 | 1.8 | 2.9 | 1.4 | 1.6 | ** |
| Mandibular dentoalveolar | ||||||
| IMPA (°) | 1.5 | 3.8 | 0.2 | 3.8 | 1.3 | NS |
| L1H (mm) | 1.2 | 1.3 | 0.2 | 1.1 | 1.0 | * |
| L1V (mm) | 3.2 | 1.9 | 3.2 | 1.8 | 0.0 | NS |
| L6H (mm) | 4.1 | 1.0 | 2.4 | 1.1 | 1.7 | ** |
| L6V (mm) | 4.1 | 1.5 | 3.3 | 1.4 | 0.8 | NS |
NS, not significant.
*P < 0.05; **P < 0.01; ***P < 0.001.