Journal of Applied Oral Science
Print version ISSN 1678-7757
ALMEIDA, Renato Rodrigues de et al. Posterior crossbite - treatment and stability. J. Appl. Oral Sci. [online]. 2012, vol.20, n.2, pp. 286-294. ISSN 1678-7757. http://dx.doi.org/10.1590/S1678-77572012000200026.
Posterior crossbite is defined as an inadequate transversal relationship of maxillary and mandibular teeth. Even when eliminating the etiologic factors, this malocclusion does not have a spontaneous correction, and should be treated with maxillary expansion as early as possible. This treatment aims at providing a better tooth/skeletal relationship, thereby improving masticatory function, and establishing a symmetrical condyle/fossa relationship. Should posterior crossbite not be treated early, it may result in skeletal changes, demanding a more complex approach. Additionally, an overcorrection expansion protocol should be applied in order to improve the treatment stability. Although the literature has reported a high rate of relapse after maxillary expansion, the goal of this study was to demonstrate excellent stability of the posterior crossbite correction 21 years post treatment.
Keywords : Orthodontics; Malocclusion; Palatal expansion technique.