Table 2. Jaw changes of 4 patients with bilateral mandibular ramus elongation.

No.	SNA(°)		SNB(°)		Ramus height (mm)				Distance of chin retrognathia (mm)
	Pre	Post	Pre	Post	Right		Left		Pre	Post	advancement
					Pre	Post	Pre	Post
1	78.82	74.01	62.46	70.89	54.50	64.25	54.66	64.31	38.29	19.68	18.61
2	75.63	79.13	58.07	64.4	64.45	67.82	63.92	68.73	48.9	41.7	7.20
3	77.28	77.33	66.17	71.82	67.43	71.63	63.91	69.16	34.39	26.92	7.47
4	80.73	79.19	61.23	64.31	47.6	59.29	46.33	60.63	39.42	31.94	7.48
Mean	78.12	77.42	61.99	67.86	58.50	65.75	57.21	65.71	40.25	30.06	10.19