Research Article
Comparisons of Jaw Line and Face Line after Mandibular Setback: Intraoral Vertical Ramus versus Sagittal Split Ramus Osteotomies
Table 2
Comparison of frontal distances after mandibular setback operations (SSROvs. IVRO).
| | | Postoperation changes | | | SSRO | IVRO | SSRO vs.IVRO | Bilateral sides | | Mean | SD | p value | | Mean | SD | p value | | p value | |
| Bone plane | 0 | 1.9 | 3.07 | 0.0030 | | 4.4 | 3.51 | < 0.0001 | | 0.0040 | †, IVRO > SSRO | | 1 | 1.9 | 2.91 | 0.0012 | | 4.7 | 4.14 | < 0.0001 | | 0.0044 | †, IVRO > SSRO | | 2 | 2.7 | 2.79 | < 0.0001 | | 3.3 | 4.91 | 0.0010 | | 0.5938 | — | | 3 | 3.2 | 4.07 | 0.0002 | | -0.9 | 7.37 | 0.5005 | — | 0.0207 | †, SSRO > IVRO |
| Muscle plane | 0 | 0.1 | 4.29 | 0.8846 | — | 0.9 | 3.84 | 0.2341 | — | 0.6025 | — | | 1 | 0.9 | 3.90 | 0.2505 | — | 0.7 | 4.10 | 0.3548 | — | 0.7963 | — | | 2 | 0.9 | 4.24 | 0.2606 | — | 0.0 | 4.03 | 0.9648 | — | 0.3837 | — | | 3 | 1.2 | 5.75 | 0.2578 | — | -0.5 | 6.19 | 0.6877 | — | 0.2604 | — |
| Skin plane | 0 | 0.5 | 4.14 | 0.5345 | — | 1.2 | 5.18 | 0.2284 | — | 0.6785 | — | | 1 | -0.5 | 4.09 | 0.5580 | — | 0.3 | 5.61 | 0.7874 | — | 0.6460 | — | | 2 | 0.2 | 5.18 | 0.8635 | — | -0.9 | 5.75 | 0.4063 | — | 0.4108 | — | | 3 | 1.3 | 5.00 | 0.1720 | — | -1.4 | 6.70 | 0.2751 | — | 0.0995 | — |
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: intragroup comparison: statistically significant, p < 0.05. †: intergroup comparison: statistically significant, p < 0.05. —: not significant. |