Dentoskeletal and soft tissue changes in class II subdivision treatment with asymmetric extraction protocols

Progress in Orthodontics

Table 5 Intergroup comparison at the posttreatment stage (t tests)

	Group 1—3 extractions (n = 31)		Group 2—1 extraction (n = 32)
Variables	Mean	S.D.	Mean	S.D.	P
Maxillary component
SNA (°)	82.37	4.75	82.70	4.65	0.778
Co-A (mm)	81.77	4.00	83.12	3.46	0.156
Mandibular component
SNB (°)	79.81	4.22	79.24	2.55	0.518
Co-Gn (mm)	114.50	6.30	113.95	5.36	0.708
Maxillomandibular relationship
ANB (°)	2.56	2.44	3.46	2.83	0.183
NAP (°)	174.60	3.95	173.38	3.86	0.218
Growth pattern
SN.GoGn (°)	28.61	5.45	26.68	4.80	0.140
LAFH (mm)	65.88	4.76	63.42	4.77	0.044^a
Maxillary dentoalveolar component
Mx1.NA (°)	23.34	5.21	27.66	8.11	0.014^a
Mx1-NA (mm)	4.85	2.42	5.12	4.13	0.758
Mx1-PP (mm)	27.74	2.27	26.38	2.81	0.039^a
Mx6-PP (mm)	22.31	2.21	20.20	2.19	0.000^a
Mx Molar asymmetry (mm)	1.83	0.42	2.94	1.07	0.000^a
Mandibular dentoalveolar component
Md1.NB (°)	27.79	5.18	30.94	5.13	0.018^a
Md1-NB (mm)	5.42	1.39	6.80	2.00	0.002^a
IMPA (°)	96.89	6.49	102.34	7.39	0.002^a
Md1-GoGn (mm)	36.95	2.94	35.95	2.89	0.180
Md6-GoGn (mm)	28.95	2.28	28.72	2.58	0.713
Md Molar asymmetry (mm)	3.15	0.58	1.88	0.54	0.000^a
Dental relationship
Overjet (mm)	2.65	0.68	2.94	0.73	0.109
Overbite (mm)	1.01	0.74	0.81	0.95	0.353
Upper lip
UL-S Line (mm)	0.56	2.67	0.14	2.55	0.524
Prn-H (mm)	4.72	5.07	5.96	4.64	0.312
Lower lip
LL-S Line (mm)	1.81	2.86	1.07	2.48	0.272
Facial convexity and nasolabial angle
Z Angle (°)	77.99	6.95	74.59	4.46	0.023^a
N’.Sn.Pog’(°)	157.49	5.94	157.67	5.90	0.905
Cm.Sn.UL (°)	106.79	9.51	102.93	10.55	0.132