Table 3: The bilateral differences (dv,dθ,dφ) of facial lines before and after orthognathic surgery in the spherical coordinates.
v : length of the facial lines(mm); θ : midsagittal angle inclination(°); φ : coronal angle inclination(°)
dv = vdeviated - vopposite ; dθ =θdeviated - θopposite ; dϕ =ϕdeviated - ϕopposite
* Statistically significant in comparing between before surgery and after surgery by Wilcoxon’s signed-rank test (p<.05)
| | Presurgical | Postsurgical |
| | Mean±SD | Mean±SD |
| Ramal height | dv(mm) | -1.26±2.08 | -1.38±2.72 |
| (Cdsup-Goinf) | dθ(°) | -5.77±5.40 | -3.62±4.05 |
| dφ(°) | -3.39±2.51 | -2.52±3.72 |
| Ramal Lateral | dv(mm) | -0.24±2.44 | -5.46±9.80 |
| (Cdlat –Golat) | dθ(°) | -4.31±2.99 | -3.60±5.54 |
| dφ(°) | -2.59±3.29 | -9.20±7.50 |
| Ramal Posterior | dv(mm) | -2.49±4.53 | -2.96±6.09 |
| (CdPost-GoPost) | dθ(°) | -3.80±6.23 | -5.23±10.08 |
| dφ(°) | -1.89±7.85 | -2.33±5.50 |
| Mandibular Body | dv(mm) | -3.62±5.11 | 1.64±5.56 |
| (GoPost - Me) | dθ(°) | -7.65±5.67* | -1.19±4.64* |
| dφ(°) | 0.30±2.48 | 0.45±2.91 |