Relationship between Frontal Gap and Postoperative Stability in the Treatment of Mandibular Prognathism

Table 1

Summary of menton (Me) and frontal gap in T21, T32, and T31.

Variable	Mean	SD	value
Me (horizontal, mm)
T21	−12.4	4.23	<0.001
T32	1.0	3.00	0.068
T31	−11.4	3.78	<0.001
Me (vertical, mm)
T21	0.6	1.73	0.048
T32	−0.5	1.96	0.153
T31	0.1	1.59	0.664
Frontal gap T2 (mm)
Right gap	4.7	2.68	0.079
Left gap	4.0	2.48

T21: immediate surgical changes; T32: postoperative stability; T31: 2-year surgical change.
Significant .