Disjunção maxilar e tração reversa da maxila em adolescente com má oclusão classe III: relato de caso.

Abstract

The maxillary expansion associated with orthopedic forces, applied both in the maxilla and in the jaw, improve facial balance. The maxillary protraction is indicated in orthodontic treatment as a non-surgical alternative for correction of malocclusion Class III malocclusion. This approach allows the orthopedic forward displacement of the maxilla with resulting downward movement while the jaw is rotated clockwise by correcting the relation of the apical bases and improving soft tissue profile. The jaw traction can be associated with rapid maxillary expansion movements, intercepting technique that helps in the treatment of malocclusion due to maxillary atresia, with the purpose of establishing a harmonious balance between the dental arches. In younger patients, this therapy gets better results when compared with older patients. This study aimed to report the case of a patient in the young permanent dentition stage with maxillary atresia, anterior and posterior cross bite and malocclusion Class III treated by rapid maxillary expansion with Haas breaker and maxillary protraction with mask facial Petit. The maxillary expansion therapy associated with maxillary protraction resulted in benefits to the patient with regard to the correction of transverse deficiencies and malocclusion Class III.