Functional treatment of maxillary hypoplasia and mandibular prognathism

The first case is a 5 years 8 months old Antillean girl, presenting an articulated complete cross-bite of the whole arch (Figure 1). The maxilla is hypoplastic in the anteroposterior and transverse directions, without any lateral deviation of the mandible, the overbite is reversed but normal in quantity. This is at primary teeth stage, without any diastemas, the lower teeth are tipped lingually to try to compensate for the discrepancy.