The Effect of Pterygomasseteric Sling’s Area in the Postoperative Stability after Mandibular Setback Surgery

Table 3

Student’s -test for significance for T32 menton between forward movement group () and backward movement group () among T1, T2, and T3 periods.

Variable	Forward		Backward		p value
	Mean	SD	Mean	SD
Horizontal change (mm)
T21	−13.8	4.41		3.93	0.034
T32	3.0	1.89		1.78	<0.001
T31	−10.8	3.59		4.37	0.072
Vertical change (mm)
T21	1.0	1.71	−0.03	2.01	0.086
T32	−1.2	1.76	0.5	1.52	0.003
T31	−0.2	1.37	0.4	2.04	0.261
Area of PMS (mm^2)
T1	1658.5	168.38	1716.4	298.11	0.447
T3	1360.3	161.70	1453.4	302.00	0.224
T31	−298.2	102.60	−263.1	182.93	0.451

: number of patients; no movement (); PMS: pterygomasseteric sling; significant ; T21: immediate surgical change; T32: postoperative stability; T31: final surgical change.