Surgery-first for a patient with mild hemifacial microsomia: A case report and review of literature

Table 1 The analysis of initial study casts

Bolton analysis
Anterior Bolton analysis			Overall Bolton analysis
Maxillary 6 width	40.78		Maxillary 12 width		84.80
Mandibular 6 width	33.81		Mandibular 12 width		81.07
Ratio	0.83		Ratio		0.96
Overbite/Overjet		Pretreatment		Posttreament
21-Overjet		1.68		2.27
11-Overjet		2.48		2.47
12-Overjet		1.87		2.25
22-Overjet		-0.15		2.01
Arch width		Pretreatment		Posttreament
The upper arch width of 3-3		33.66		33.86
The lower arch width of 3-3		24.30		26.44
The upper arch width of 6-6		52.63		50.85
The lower arch width of 6-6		48.78		47.56

Table 2 Cephalometric analysis at pretreatment and posttreatment

	Pretreatment	Posttreatment	Norm ± SD
Skeletal
SNA (°)	86.6	86.9	82.0 ± 3.5
SNB (°)	84.7	83.0	80.9 ± 3.4
ANB (°)	1.9	3.9	1.6 ± 1.5
Pog-NB (mm)	0.9	2.0	3.0 ± 1.7
FMA (°)	23.0	35.7	22.9 ± 4.5
Wits (°)	-5.7	-3.8	-1.0 ± 1.0
S-Go/N-Me	69	65.8	65.0 ± 4.0
Y-Axis (°)	65.5	67.1	67.0 ± 5.5
MP-SN (°)	30.8	35.7	33.0 ± 6.0
Dental
U1-NA (mm)	2.8	2.7	4.3 ± 2.7
U1-NA (°)	17.2	17.4	22.8 ± 5.7
L1-NB (mm)	3.8	5.2	4.0 ± 1.8
L1-NB (°)	21.7	35	25.3 ± 6.0
U1-SN (°)	103.8	102.4	103.1 ± 5.5
IMPA (°)	86.2	96.3	95.0 ± 7.0
FMIA (°)	70.8	56.2	65.7 ± 8.5

S: Sella; N: Nasion; A: A-point; B: B point; SNA: Sella-nasion-A point; SNB: Sella-nasion-B point; ANB: A point-nasion-B point; FMA: Angle between mandibular plane and Frankfort horizontal plane; MP-SN: Angle between mandibular plane and sella-nasion plane; NA: Nasion-A point plane; NB: Nasion-B point plane; IMPA: Lower incisor mandibular plane angle; FMIA: Lower incisor Frankfort horizontal plane angle; SD: Standard deviation.

Table 3 Frontal cephalometric analysis at pretreatment and posttreatment

	Pretreatment	Posttreatment	Norm ± SD
Maxillo-Mandibular relationships
Frontal convexity, left (mm)	16.9	13.9	11.9 ± 2.5
Frontal convexity, right (mm)	11.1	12.0	11.9 ± 2.5
Maxillo-Mandi Midline (mm)	-14.3	0.7	0.0 ± 2.0
Skeletal/Dental
Occlusal plane tilt	-4.9	-0.4	0.0 ± 2.0
Molar to jaw, left (mm)	10.3	11.0	13.1 ± 1.7
Molar to jaw, right (mm)	8.0	11.2	13.1 ± 1.7
Denture to jaw midline (mm)	-1.5	0.2	0.0 ± 1.5
Deep skeletal structure
Maxillary width (mm)	62.3	62.4	64.1 ± 3.0
Mandibular width (mm)	85.6	81.5	81.3 ± 3.0
Facial width (mm)	129.0	128.8	124.7 ± 3.0

SD: Standard deviation.