Combined Orthodontic and Surgical Approach in the Correction of a Class III Skeletal Malocclusion with Mandibular Prognathism and Vertical Maxillary Excess Using Bimaxillary Osteotomy
Table 1
Cephalometrics for orthognathic surgery.
Variable
Clinical norm
Pretreatment
Posttreatment
Description
Horizontal (skeletal)
N-A-Pg
mm
−2°
7°
Convexity
N-A
mm
5 mm
9 mm
Maxillary position
N-B
mm
13 mm
5 mm
Mandibular position
N-Pg
mm
15 mm
10 mm
Position of chin
Vertical (skeletal and dental)
N-ANS
mm
56 mm
51 mm
Anterior upper facial height
ANS-Gn
mm
76 mm
72 mm
Anterior lower facial height
PNS-N
mm
56 mm
51 mm
Posterior upper facial height
MP-HP
31°
28°
Angle of mandibular to horizontal plane
1U-NF
mm
29 mm
27 mm
Distance of incisal edge of 1U to palatal plane
1L-MP
mm
46 mm
46 mm
Distance of incisal edge of 1L to mandibular plane