Revista Dental Press de Ortodontia e Ortopedia Facial
versión On-line ISSN 1980-5500
QUAGLIO, Camila Leite; HENRIQUES, Rafael Pinelli; HENRIQUES, José Fernando Castanha y FREITAS, Marcos Roberto de. Class II division 1 associated with maxillary transverse deficiency treated by Hyrax expander and Herbst appliance: clinical case report . Rev. Dent. Press Ortodon. Ortop. Facial [online]. 2009, vol.14, n.5, pp.118-128. ISSN 1980-5500. http://dx.doi.org/10.1590/S1415-54192009000500016.
The Angle Class II division 1 malocclusion is often accompanied by maxillary transverse deficiency. When ever is possible, this maxillary transverse problem must be corrected before the anteroposterior correction. The rapid maxillary expanders is the appliance more used to correct the transverse deficiency. For the Class II malocclusion correction the fixed functional appliances are more studied and used. They are a kind of intraoral appliance that almost don't need patient's collaboration. The aim of this study is to show the results' stability after six years of the orthodontic treatment with Hyrax expander, followed by Herbst and straight wire appliances. After a literature review, a clinical case with maxillary transverse deficiency and Class II division 1 malocclusion treated with this therapy is reported. The treatment duration was very brief and the results were functionally and esthetically satisfactory with a long-term stability.
Palabras clave : Malocclusion; Angle Class II; Orthodontics; Palatal expansion technique.