Table 3.

Comparison of frontal angles 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
Or-ramus angle	2.3	5.53	0.0326	∗	-7.3	11.15	0.0015	∗	0.0001	†, SSRO > IVRO
Or-muscle angle	2.9	11.36	0.1749	—	-0.5	9.56	0.7874	—	0.1917	—
Or-skin angle	0.7	7.50	0.5965	—	-5.4	6.51	0.0001	∗	0.0010	†, SSRO > IVRO
Jaw angle	-3.8	6.95	0.0052	∗	7.1	9.99	0.0007	∗	0.0001	†, IVRO > SSRO
Face angle	-3.5	11.48	0.1073	—	3.4	7.66	0.0229	∗	0.0054	†, IVRO > SSRO

∗: intragroup comparison: statistically significant, p < 0.05.

†: intergroup comparison: statistically significant, p < 0.05.

—: not significant.