In the present study, it can be concluded that Wunderer's activator and a face mask were successful in improving the skeletal and dentoalveolar discrepancy, and it could be used in correction of skeletal Class III due to
maxillary deficiency by restricted the growth of the mandible and enhance the advancement of the maxilla.
Inclusion criteria of the study were active growth period, true class III skeletal relationships due to maxillary deficiencies, a negative ANB angle due to lowered SNA angle, posteriorly positioned A point due to maxillary deficiency according to McNamara analysis, and concave profile.
Reverse pull headgear therapy is indicated for patients with maxillary deficiency. The new reverse pull headgear was used for the same indication as the conventional one.
This 13 years old male patient had moderate maxillary deficiency, a class III concave profile and a transverse maxillary arch form with unilateral crossbite.
The treatment of maxillary deficiency by opening the midpalatal suture.
After radiological and facial evaluation, the patient was diagnosed with a Class III malocclusion, presenting a dolichofacial, asymmetrical, concave profile, with
maxillary deficiency and a slightly increased mandibular growth.
This can be interpreted as an anterior mandibular excess or
maxillary deficiency. Uysal and Sari18 found overall ratio discrepancy in 18% and anterior discrepancy in 21.3% of the subjects.
However, bilateral crossbite and functional crossbite are usually associated with transverse
maxillary deficiency [5,6].
