The present study reports a case of Angle Class II malocclusion treatment of a male growing patient with 10-mm overjet, excessive overbite and transverse maxillary deficiency. The case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO), with DI equal to or greater than 10, as a requirement for the title of certified by the BBO.
Angle Class III malocclusion; Palatal expansion technique; Growth and development
| Measurements | Normal | A | B | Dif. A/B | ||
|---|---|---|---|---|---|---|
| Skeletal pattern |
SNA | (Steiner) | 82° | 84° | 81° | 3 |
| SNB | (Steiner) | 80° | 78° | 80° | 2 | |
| ANB | (Steiner) | 2° | 6° | 1° | 5 | |
| Angle of convexity | (Downs) | 0° | 8° | -5° | 13 | |
| Y axis | (Downs) | 59° | 63° | 59° | 4 | |
| Facial angle | (Downs) | 87° | 87° | 88° | 1 | |
| SN-GoGn | (Steiner) | 32° | 23° | 23° | 0 | |
| FMA | (Tweed) | 25° | 17° | 19° | 2 | |
| Dental pattern |
IMPA | (Tweed) | 90° | 106° | 106° | 0 |
| 1.NA (degrees) | (Steiner) | 22° | 30° | 25° | 5 | |
| 1-NA (mm) | (Steiner) | 4 mm | 8 mm | 5 mm | 3 | |
| 1.NB (degrees) | (Steiner) | 25° | 27° | 30° | 3 | |
| 1-NB (mm) | (Steiner) | 4 mm | 5 mm | 3 mm | 2 | |
| - Interincisal angle | (Downs) | 130° | 119° | 126° | 7 | |
| 1-APo | (Ricketts) | 1 mm | 0 mm | -1 mm | 1 | |
| Profile | Upper lip — S-line | (Steiner) | 0 mm | 1 mm | -3 mm | 4 |
| Lower lip — S-line | (Steiner) | 0 mm | 2 mm | -3 mm | 5 |
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