Comparisons of Jaw Line and Face Line after Mandibular Setback: Intraoral Vertical Ramus versus Sagittal Split Ramus Osteotomies

Table 1

Comparison of lateral dimensions after mandibular setback operations (SSRO vs. IVRO).

	Postoperation changes
	SSRO				IVRO				SSRO vs. IVRO
	Mean	SD	p value		Mean	SD	p value		p value
Pog (horizontal)	-5.0	3.41	< 0.0001		-11.9	4.15	< 0.0001		< 0.0001	†, IVRO > SSRO
Pog (vertical)	-1.4	2.73	0.008		-0.2	2.68	0.7355	—	0.0774	—
Ramus width	-0.6	2.16	0.1252	—	-3.9	3.05	< 0.0001		< 0.0001	†, IVRO > SSRO
Gonial width	-0.9	3.65	0.2198	—	-5.8	2.66	< 0.0001		< 0.0001	†, IVRO > SSRO
Ramus angle	2.2	3.03	0.0006		0.9	4.97	0.3288	—	0.3011	—
Gonial angle	-2.6	3.77	0.0010		5.3	4.45	< 0.0001		< 0.0001	†, IVRO > SSRO
Mandibular plane angle	-0.4	3.42	0.5173	—	6.2	4.39	< 0.0001		< 0.0001	†, IVRO > SSRO

: intragroup comparison: statistically significant, p < 0.05.
†: intergroup comparison: statistically significant, p < 0.05.
—: not significant.