Phase III - Category 3 - Class I Malocclusion
treated with bilateral extraction of permanent
teeth in the maxillary and mandibular arch
Cephalometric Summary

Area of Study

Measurement

(A1)

(A2)

(B)

Difference
(A
1-B)

Maxilla to
Cranial Base

SNA

84º

 

83º

-1º

Mandible to
Cranial Base

SNB
SN-Go-Gn
FMA

82º
27º
20º

 

82º
25º
21º


.5º

Maxillo-
Mandibular

ANB

 

-1º

Maxillary
Dentition

1 to NA (mm)
1 to SN
6-6 (mm) (casts)

2mm
108º
32mm

 

3mm
107º
32mm

1mm
-1º
0mm

Mandibular
Dentition

1 to NB (mm)
1 to Go-Gn
6-6 (mm) (casts)
3-3 (mm) (casts)

3.5mm
95º
32mm
27mm

 

3.5mm
92º
27mm
28mm

0mm
-3º
-5mm
+1mm

Soft Tissues

Esthetic Plane

-5mm

 

-6mm

-1mm

A1 =
Pretreatment records

A2 =
Interim or progress records if indicated

B =
Posttreatment records


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