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
6U-NF	mm	29 mm	25 mm	Distance of mesial cusp of 6u to palatal plane
6L-MP	mm	29 mm	30 mm	Distance of mesial cusp of 6l to mandibular plane
Maxilla and mandible
ANS-PNS	mm	53 mm	54 mm	Maxillary length
Ar-Go	mm	58 mm	57 mm	Ramus length
Go-Pg	mm	86 mm	79 mm	Mandibular length
B-Pg	mm	6 mm	9 mm	Chin prominence
Ar-Go-Gn		144°	138°	Gonial angle
Dentition
A-B		−10.5°	0°	Distance of A to B on occlusal plane
Max1-NF		136°	121°	Angle of axis of 1U to palatal plane
Mand1-MP		86°	84°	Angle of axis of 1L to mandibular plane