Maxillary Expansion in Mixed Dentition

Abstract

Posterior crossbite is one of the most prevalent malocclusions in the mixed dentition period; it does not have a spontaneous correction and should be treated as early as possible, after an accurate diagnosis. Maxillary expansion is considered an effective and reliable method for increasing transverse dimension in patients with unilateral or bilateral posterior crossbites. Moreover, it seems that this not only enlarges the constricted maxillae, but also creates additional spaces in the dental arches to resolve borderline dental crowding in some patients. This chapter addresses the aetiology, diagnosis and treatment of maxillary transverse discrepancy in the mixed dentition period.

Keywords: Hyrax appliance, Maxillary expansion, Posterior cross-bite, Quadhelix appliance.

Cite as