Cephalometric analysis of postsurgical relapse (T2-T1) of the MR group and LR group
| Measurements | MR group | LR group | Sig. | ||
|---|---|---|---|---|---|
| Mean | SD | Mean | SD | ||
| Mandibular anterior and posterior measurements | |||||
| S-perp to Pog (mm) | 4.45 | 1.26 | 1.34 | 1.07 | <0.001 |
| S-perp to Me (mm) | 5.15 | 1.76 | 1.05 | 1.34 | <0.001 |
| Mn body length (mm) | 1.62 | 3.72 | 2.21 | 2.47 | NS |
| SNB (°) | 1.93 | 0.79 | 0.75 | 0.68 | 0.001 |
| AB to Mn plane angle (°) | –4.15 | 2.28 | –2.37 | 2.19 | NS |
| Angular measurements | |||||
| Articular angle (°) | –3.08 | 2.81 | –0.54 | 1.25 | 0.012 |
| Gonial angle (°) | 2.79 | 3.08 | 1.38 | 2.53 | NS |
| FMA (°) | –0.79 | 2.48 | 1.14 | 2.33 | NS |
| Vertical measurements | |||||
| FH to Pog (mm) | –3.14 | 2.44 | –1.50 | 0.88 | 0.046 |
| FH to Me (mm) | –2.64 | 1.66 | –1.55 | 0.90 | 0.050 |
| Post. facial height (mm) | –2.46 | 2.62 | –3.84 | 2.83 | NS |
| Ant. facial height (mm) | –2.58 | 1.52 | –1.56 | 1.17 | NS |
| Dental measurements | |||||
| U1 to FH (°) | 3.34 | 4.07 | –0.31 | 4.21 | 0.038 |
| IMPA (°) | 0.34 | 6.33 | 1.09 | 3.51 | NS |
| FH to U occlusal plane (°) | –1.46 | 3.28 | 1.58 | 2.52 | 0.016 |
| FH to L occlusal plane (°) | –3.85 | 4.32 | –1.18 | 3.49 | NS |
| FH to U1 (mm) | –0.86 | 1.70 | 0.28 | 1.10 | NS |
| FH to U6 (mm) | –0.14 | 0.85 | –0.67 | 1.11 | NS |
(T2: immediately after orthodontic treatment, T1: 1 month after surgery, MR: more relapsed, LR: less relapsed, SD: standard deviation, Sig.: significant in the independent t -test, NS: not significant, S-perp: a line perpendiculat to FH plane through Sella, FMA: Frankfort-mandibular plane angle, FH: Frankfort horizontal, Post.: posterior, Ant.: anterior, IMPA: incisor mandibular plane angle)