Expansão rápida maxilar com uso do aparelho HYRAX

Abstract

The maxillary constriction is among the most common and harmful craniofacial skeletal problems. Rapid maxillary expansion (RME) or disjunction is one of the most commonly used medical procedures in orthodontic practice and is a method used to restore the normal transverse relationship between skeletal bone bases. To get a maxillary expansion is necessary the disjunction of the palatine suture through orthopedics appliances. The aim of this study was to review the literature on rapid maxillary expansion using Hyrax appliance and demonstrate, through a case report of a female patient, 9 years old, its results, both clinically and radiographically. The Hyrax appliance is an active and tooth-borne expander fixed that has the advantage of easy cleaning by not having acrylic cover, like Haas, on the palate, which caused irritation of the soft tissue due to the food impaction in this. In conclusion, RME, when properly indicated, is efficient and stable and the Hyrax appliance is effective as to the disjunction and allows the patient to make a better cleaning.