Table 2. Descriptive statistics for the transverse changes between bilateral rugae points in relation to the median palatal plane for pre- and post-treated orthodontic patients.

VARIABLE		MEAN	SD	MAXIMUM	MINIMUM
1st lateral left ruga	Pre	120.56	8.85	166.01	106.92	P<0.05
	Post	139.51	18.26	150.12	74.73
1st medial left ruga	Pre	23.70	14.69	58.14	7.07	P>0.05
	Post	26.04	14.02	56.47	11
1st lateral right ruga	Pre	122.33	13.35	136.53	110.03	P>0.05
	Post	144.52	17.28	155.08	124.58
1st medial right ruga	Pre	33.49	15.43	50.36	20.1	P>0.05
	Post	24.75	3.05	28.07	22.09
2nd lateral left ruga	Pre	142.83	24.81	171.42	127.01	P<0.05
	Post	131.95	22.82	158.2	116.84
2nd medial left ruga	Pre	49.05	20.07	64.28	26.31	P>0.05
	Post	46.01	16	62	30
2nd lateral right ruga	Pre	121.47	34.32	160.05	94.34	P>0.05
	Post	136.7	27.57	168.01	116.07
2nd medial right ruga	Pre	46.86	46.99	100.3	12	P>0.05
	Post	44.70	40.98	92	20
3rd lateral left ruga	Pre	177.06	22.43	202.16	159	P>0.05
	Post	157.49	30.29	192.17	136.24
3rd medial left ruga	Pre	91.46	6.19	98.18	86	P>0.05
	Post	94.13	3.37	98.02	82.02
3rd lateral right ruga	Pre	169.38	12.99	162.01	122.07	P>0.05
	Post	173.43	15.98	190	158.11
3rd medial right ruga	Pre	79.38	54.29	130.06	22.09	P>0.05
	Post	75.54	46.44	106.02	22.09

Values are expressed in pixels. SD= standard deviation.